Consulta: subjectFacets:"Antimicrobial"
Registros recuperados: 69
Data/hora: 17/06/2024 04:09:38

Avaliação do revestimento de quitosana como carreador de nisina para prolongar a vida de prateleira de queijos caprinos.
Provedor de dados: 119
Autores: SOUSA, C. R. V.; BASTOS, M. do S. R.; BORGES, M. de F.; OLIVEIRA, M. de A.; MENDES, F. R. S.; ROSENTHAL, A.; BENEVIDES, S. D.
Tipo: Parte de livro
Palavras-chave: Polymer; Biodegradable; Antimicrobial; Dairy goat products; Antimicrobiano; Polímero.; Biodegradável; Lácteos caprinos.
Ano: 2016
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1059214

Clavanin bacterial sepsis control using a novel methacrylate nanocarrier.
Provedor de dados: 119
Autores: SAÚDE, A. C. M.; OMBREDANE, A. S.; SILVA, O. N.; BARBOSA, J. A. R. G.; MORENO, S. E.; ARAUJO, A. C. G.; FALCAO, R.; SILVA, L. P.; DIAS, S. C.; FRANCO, O. L.
Tipo: Separatas
Palavras-chave: Antimicrobial; Nanobiotechnology; Peptide.; Nanoparticles.
Ano: 2014
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1005987

Revisão da fitoquímica de Annonaceae Jussieu.
Provedor de dados: 119
Autores: SAITO, M. L.
Considerando a importância da familia Annonaceae Jussieu do ponto de vista de sua composição química e atividades biologicas, foram levantadas informacões sobre os componentes químicos já isolados de espécies esta família.
Tipo: Artigo de periódico
Palavras-chave: Anestesica; Sedativa; Analgésica; Hipotensiva; Citotoxica; Antimicrobiana; Antitussiva; Emetica; Expectorante; Antialergica; Alcaloides; Sedative; Anaesthetic; Cytotoxic; Antimicrobial; Anticough; Emetical; Expectorant; Antiallergic; Annonaceae; Composição Química; Alkaloids; Chemical composition; Hypotension.
Ano: 1995
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/12423

Psidium cattleianum fruits: A review on its composition and bioactivity.
Provedor de dados: 119
Autores: PEREIRA, E. dos S.; VINHOLES, J.; FRANZON, R. C.; DALMAZO, G.; VIZZOTTO, M.; NORA, L.
Tipo: Artigo de periódico
Palavras-chave: Antidiabetic; Anticancer; Antimicrobial; Anti-inflammatory; Anti-aging; Araçá; Antioxidante; Chemical composition.
Ano: 2018
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1094287

Recombinant Cry1la protein is highly toxic to cotton boll weevil (Anthonomus grandis boheman) and fall armyworm (Spodoptera frugiperda).
Provedor de dados: 119
Autores: MARTINS, E. S.; AGUIAR, R. W. D. S.; MARTINS, N. F.; MELATTI, V. M.; FALCÃO, R.; GOMES, A. C. M. M.; RIBEIRO, B. M.; MONNERAT, R. G.
Tipo: Separatas
Palavras-chave: Antimicrobial; Bacillus; Biocontrol; Genes; Pests.
Ano: 2008
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/190641

Teste de susceptibilidade a antimicrobianos de isolados de Escherichia coli provenientes de queijos a base de leite não pasteurizado.
Provedor de dados: 119
Autores: RIBEIRO, L. R; BARBOSA, M. M. C.; PINTO, F. R.; SOUZA, V. de; OLIVEIRA, M. C.; BORGES, L. A.; MEDEIROS, M. I. M.; AMARAL, L. A.; FAIRBROTHER, J. M.
Tipo: Parte de livro
Palavras-chave: Antimicrobiano; Susceptibilidade; Resistência antimicrobiana; Resistance to antibiotics.; Antimicrobial; Chesse; Milk byproducts; Pathogenic Bacteria; Escherichia coli; Bactéria patogênica; Queijo; Produto derivado do leite; Pasteurização; Patogenicidade; Segurança alimentar; Food security; Milk; Pathogenicity; Pasteurization.
Ano: 2013
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/969531

Antimicrobial activity in polymeric films with different concentrations of silver nanoparticles.
Provedor de dados: 119
Autores: BRITO, S. C.; BRESOLIN, J. D.; SIVIERI, K.; FERREIRA, M. D.
Tipo: Anais e Proceedings de eventos
Palavras-chave: Polyethilene; Silver nanoparticles; Antimicrobial.
Ano: 2019
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1118557

Low-density polyethylene films incorporated with silver nanoparticles to promote antimicrobial efficiency in food packaging.
Provedor de dados: 119
Autores: BRITO, S. C.; BRESOLIN, J. D.; SIVIERI, K.; FERREIRA, M. D.
Tipo: Artigo de periódico
Palavras-chave: Silver nanoparticles; Antimicrobial.
Ano: 2019
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1118015

Quality and microbiological protection of table eggs by ultrasonic application of acidic electrolyzed water and chitosan
Provedor de dados: 109
Autores: Cabanillas-Beltrán,Héctor; González-Estrada,Ramsés R; Gutiérrez-Martínez,Porfirio; Hernández-López,Silvia María.
Abstract Ultrasonic nebulization was used as a novel method of chitosan (CH) and acidic electrolyzed water (AEW) application on table eggs; effects on preservation, quality and antimicrobial properties were investigated. The effect of the application of CH and AEW alone or in combination on eggs quality was evaluated in terms of weight loss, shell thickness, yolk colour, Haugh units and shell strength. Additionally, the application of CH and AEW as antimicrobial agent was investigated in order to evaluate their efficacy against Salmonella enteritidis and Escherichia coli (ATCC 25922). A negative effect was observed by the sole application of AEW on eggshell thickness and strength. Conversely, the combination of AEW and CH improve eggshell strength, as well...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antimicrobial; Biopolymer; Fogging; Sanitizer.
Ano: 2020
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122020000200097

Characterization and biological properties of sulfated polysaccharides of Corallina officinalis and Pterocladia capillacea
Provedor de dados: 39
Autores: Ismail,Mona Mohamed; Amer,Mohamed Saleh.
ABSTRACT Red seaweed possess various sulfated polysaccharides (SPs) that could potentially be exploited as bioactive agents for medical and industrial applications. Crude polysaccharides from the red algae Corallina officinalis (SP1) and Pterocladia capillacea (SP2) were extracted and characterized according to their chemical content and their antioxidant, anti-inflammatory, anticoagulant, antibacterial, antifungal, and antifouling activities. The isolated polysaccharides contained low levels of protein and high levels of carbohydrate and sulfate. The extracted SPs were characterized by Fourier-transform infrared (FTIR) and nuclear magnetic resonance (NMR) spectral data and revealed that SP1 is composed of carrageenan, while SP2 is composed of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anticoagulant; Antifouling; Antimicrobial; Antioxidant; Polysaccharides; Red seaweed.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062020000400623

Essential oil from Chenopodium ambrosioides L.: secretory structures, antibacterial and antioxidant activities
Provedor de dados: 3
Autores: Santiago, Juliana Andrade; Cardoso, Maria das Graças; Batista, Luís Roberto; Castro, Evaristo Mauro de; Teixeira, Maria Luisa; Pires, Marinês Ferreira.
The aim of this study was to evaluate the antibacterial and antioxidant activities of essential oil from Chenopodium ambrosioides L. and to determine its secretory structures. The essential oil was extracted through the hydrodistillation technique using a modified Clevenger apparatus (2 hours) and chemically characterized by GC/MS and GC-FID. The antioxidant activity was determined by monitoring the reduction of 2,2-diphenyl-1-picrylhydrazyl (DPPH) and by the oxidation of the β-carotene/linoleic acid system. The evaluation of antibacterial activity was performed by the agar cavity diffusion technique using the microorganisms Staphylococcus aureus, Listeria monocytogenes, Escherichia coli and Salmonella Cholerasuis. The characterization of trichomes was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Natural products; Antioxidant assays; Antimicrobial; Trichomes.
Ano: 2016
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/28303

Assessment of natural vegetal extracts in the inhibition of Leuconostoc mesenteroides MSI
Provedor de dados: 114
Autores: Serra,M. A; Garnero,J. A; Nicolau,V. V; Andreatta,A. E.
The present study focuses on the assessment of natural vegetal extracts in the inhibition of bacteria altering Vienna sausages whose growth becomes evident in the vacuum packed product after two to three weeks of refrigerated storage causing packages to swell. The different natural extracts were obtained by means of steam stripping, microwave assisted extraction and ultrasound assisted extraction. Apart from these extracts, commercial essential oils, pure compounds present in the vegetal kingdom and solutions were also evaluated. For each of the extracts, microbial sensitivity tests were carried out in order to assess the inhibitory/bactericidal effect against Leuconostoc mesenteroides MS1. It has been found that the essential oils obtained from Citrus...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Leuconostoc mesenteroides MS1; Antimicrobial; Essential oil; Inhibitor; Bactericide; Vienna sausage.
Ano: 2018
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1668-298X2018000100006

Isolation, characterization and evaluation of antimicrobial and cytotoxic activity of estragole, obtained from the essential oil of croton zehntneri (euphorbiaceae)
Provedor de dados: 42
Autores: ANDRADE,THALLITA C.B.; LIMA,SIDNEY G. DE; FREITAS,RIVELILSON M.; ROCHA,MÁRCIO S.; ISLAM,TOREQUL; SILVA,TERESINHA G. DA; MILITÃO,GARDENIA C.G.
Croton zehntneri (Euphorbiaceae) is a native aromatic plant from Northeast region of Brazil. The monoterpenoid estragole (ESL) has been isolated by classical chromatographic methods from the essential oil (EO) of C. zehnteneri leaves and characterized by GC-FID and GC-MS, its antimicrobial and cytotoxic potentials being assessed. The analysis of the EO enabled the identification of 100% of the integrated constituents, of which yield was about 1.8%. The main components identified were: eucalyptol, estragole (84.7%) and spathulenol. The dosage of 50 μg/disk of ESL presented fairly significant zones of inhibition against Gram-positive bacteria and fungi. The ESL presented toxicity against Artemia salina with LC50 and LC90 of 4,54 and 8,47 μg mL-1. However, in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antimicrobial; Croton zehntneri; Cytotoxic; Estragole.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000100173

Antioxidant and antimicrobial potential of selected varieties of Piper betle L. (Betel leaf)
Provedor de dados: 42
Autores: SARMA,CHAYANIKA; RASANE,PRASAD; KAUR,SAWINDER; SINGH,JYOTI; SINGH,JOGINDER; GAT,YOGESH; GARBA,UMAR; KAUR,DAMANPREET; DHAWAN,KAJAL.
Abstract Piper betle L., is an evergreen perennial creeper belonging to family Piperaceae and is known to possess numerous medicinal properties. Current study focuses on evaluating antioxidant and antimicrobial potential of betel leaf. For the present study, distilled water, hexane, acetone and ethanolic extracts of two varieties of betel leaves: Meetha paan and Banarasi paan were used. Biochemical tests such as proximate analysis (moisture, ash, protein, lipids, minerals viz., sodium and potassium), antioxidant activity tests (DPPH radical scavenging activity, total phenolics, ascorbic acid, reducing power) and antimicrobial test (antibacterial and antifungal susceptibility test) against four pathogens viz., B. subtilis, E. coli, A. niger and S....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Piper betle; Piperaceae; Antioxidant; Antimicrobial; Biochemical.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000703871

Chemical Constituents and Pharmacology properties of Aristolochia triangularis: a south brazilian highly-consumed botanical with multiple bioactivities
Provedor de dados: 42
Autores: OLIVEIRA,SIMONE Q.; KRATZ,JADEL M.; CHAVES,VITOR C.; GUIMARÃES,TATIANA R.; COSTA,DANIELLE T.M.; DIMITRAKOUDI,SAPFO; VONTZALIDOU,ARGYRO; BORDIGNON,SÉRGIO A.L.; SIMIONATO,CESAR P.; STEINDEL,MÁRIO; REGINATTO,FLÁVIO H.; SIMÕES,CLÁUDIA M.O.; SCHENKEL,ELOIR P.
Abstract: Aristolochia triangularis Cham., is one of the most frequently used medicinal plant in Southern Brazil. Preparations containing the leaves and/or stems are traditionally used as anti-inflammatory, diuretic, as well as antidote against snakebites. This study screened A. triangularis extracts, fractions and isolated compounds for different bioactivities. A weak antiproliferative activity against human lung cancer cell line (A549) was observed only for chloroform fraction obtained from stems (CFstems - CC50: 2.93 µg/mL). Also, a moderate antimicrobial activity against Staphylococcus aureus was detected just for chloroform fraction obtained from leaves (CFleaves -13-16 mm inhibition zone). Additionally, two semi-purified fractions (CFstems-4 and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aristolochia triangularis; Antiproliferative; Antiherpes; Antimicrobial; Antiprotozoal; Aristolochic acids.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000500801

Antimicrobial, antioxidant and cytotoxicity potential of Manihot multifida (L.) Crantz (Euphorbiaceae)
Provedor de dados: 42
Autores: FABRI,RODRIGO L.; SÁ,DANIEL S. DE; PEREIRA,ANA PATRÍCIA O.; SCIO,ELITA; PIMENTA,DANIEL S.; CHEDIER,LUCIANA M.
Manihot multifida (L.) Crantz (Euphorbiaceae) is widely used in popular medicine for the treatment of infected wounds. This study evaluated thein vitro antioxidant and antimicrobial potential of this species against strains of Gram-positive and Gram-negative bacteria and fungi, known to cause infections in humans. The extracts showed minimal inhibitory concentration (MIC) varying from 39 to 2500 µg/mL for antimicrobial activity. The methanolic extract of fruits, aqueous and hexane extracts of leaves showed a very strong activity against Candida albicans(ATCC 18804) with MIC of 39 µg/mL. Furthermore, the methanolic extract of M. multifida leaves exhibited DPPH (1,1-diphenyl-2-picrylhydrazyl) scavenging potential with inhibitory concentration (IC50) values...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antimicrobial; Antioxidant; Candida albicans; Cytotoxicity; Manihot multifida.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000100303

Scutia buxifolia Reissek essential oil: in vitro antioxidant and antimicrobial activities
Provedor de dados: 42
Autores: BOLIGON,ALINE A.; PIANA,MARIANA; BRUM,THIELE F. DE; FROEDER,AMANDA L.F.; BELKE,BIANCA V.; SCHWANZ,THIAGO G.; MARIO,DÉBORA N.; ALVES,SYDNEY H.; ATHAYDE,MARGARETH L.
The volatile oil from the stem bark of Scutia buxifolia (Rhamnaceae) has been obtained by hydrodistillation and analyzed by GC-MS. Twenty-one components were identified representing 99.93 % of the total oil composition, spathulenol (35.87%), β-cubebene (17.26%), germacrene D (6.43%), linalool (5.19%), carvacrol (4.05%) were the main components of S. buxifolia essential oil. Antioxidant and antimicrobial properties of the essential oil were evaluated by free radical scavenging (DPPH) assay and micro broth dilution method, respectively. S. buxifolia essential oil presented interesting radical scavenging activity (IC50 = 15.03 ± 0.11 µg/mL). The antibacterial assay showed that S. buxifolia stem bark essential oil was moderately active against the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Scutia buxifolia; Essential oil; Antioxidant; Antimicrobial.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000301463

Essential oil of Mitracarpus frigidus as a potent source of bioactive compounds
Provedor de dados: 42
Autores: Fabri,Rodrigo L.; Coimbra,Elaine S.; Almeida,Ana C.; Siqueira,Ezequias P.; Alves,Tânia M.A.; Zani,Carlos L.; Scio,Elita.
In our previous work (Fabri et al. 2009), we showed that different extracts of Mitracarpus frigidus had significant antibacterial, antifungal and leishmanicidal activities. In order to increase our knowledge about this species, this work assesses the chemical composition and the in vitro biological activity of its essential oil. Thus, the essential oil obtained by hydrodistillation of the aerial parts of M. frigidus was analyzed by GC/MS. Among several compounds detected, 11 were identified, being linalool and eugenol acetate the major components. The essential oil exhibited a moderate antibacterial effect against Staphyloccocus aureus, Bacillus cereus, Pseudomonas aeruginosa and Enterobacter cloacae (MIC 250 µg/mL). On the other hand, it showed a strong...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mitracarpus frigidus; Essential oil; Antimicrobial; Antileishmanial; Cytotoxicity.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652012000400021

Identification and antimicrobial susceptibility patterns of Staphylococcus spp. isolated from canine chronic otitis externa
Provedor de dados: 45
Autores: Silva,N.
Swab samples obtained from 96 dogs with chronic otitis externa were cultured for the isolation of Staphylococcus species. Of 57 staphylococcal strains, 41 (72%) were coagulase-negative (CNS). The identification of staphylococci strains was made by standard procedures for the routine identification of staphylococci in clinical practice. S. sciuri was the most frequent species isolated (22.8%) from chronic otitis externa in dogs followed by S. intermedius (12.3%), S. auricularis (10.5%) and S. aureus (8.8%). Three (5.2%) CNS strains could not be identified. Bacterial isolates were susceptible to enrofloxacin, gentamicin, cephalothin, chloramphenicol and neomycin. Resistance was most common to penicillin G, oxacillin and ampicillin.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dog; Otitis externa; Staphylococci; Antimicrobial.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352001000200001

Microbiological analysis and sensitivity profile of Staphylococcus spp. in subclinical mastitis of dairy goats
Provedor de dados: 45
Autores: Salaberry,S.R.S.; Saidenberg,A.B.S.; Zuniga,E.; Gonsales,F.F.; Melville,P.A.; Benites,N.R.
Subclinical mastitis in goats causes economic losses and risks to public health. Given the need for research that shows the most isolated staphylococci species and sensibility tests comparing the resistance between coagulase-negative (CNS) and positive Staphylococcus (CPS) goats with subclinical mastitis, the aim of this study was to identify the microorganisms isolated from milk samples of goats with subclinical mastitis, as well as define the staphylococci species and determine the sensitivity profile of Staphylococcus spp. to antimicrobials. To collect samples, tests were performed for mug of black background and California mastitis test (CMT), collecting milk from CMT positive animals. A total of 226 samples from seven herds of dairy goats was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antimicrobial; Milk; Sensibility test; Staphylococci.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352016000200336

Antimicrobial profile screening of two oils of Copaifera genus
Provedor de dados: 45
Autores: Pieri,F.A.; Silva,V.O.; Souza,C.F.; Costa,J.C.M.; Santos,L.F.; Moreira,M.A.S.
O objetivo deste estudo foi identificar a atividade inibitória de óleos de copaíba sobre o crescimento dos micro-organismos: Shigella flexneri, Klebsiella pneumoniae, Escherichia coli, Proteus mirabilis, Pseudomonas aeruginosa, Citrobacter freundi, Staphylococcus aureus, Actinobacillus pleuropneumoniae e Haemophilus parasuis. Foi realizado um teste de difusão em ágar com duas soluções a 10% de óleos de copaíba obtidos de duas diferentes espécies de copaíba (Copaifera officinalis e C. langsdorffii) e um controle negativo com tween 80 e água. Os isolados clínicos de H. parasuis e A. pleuropneumoniae foram incubados em microaerofilia. Os resultados mostraram três espécies Gram-negativas inibidas por ambas as soluções de óleo de copaíba: E. coli, P. aeruginosa...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phytotherapics; Antimicrobial; Antibacterial; Copaifera.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352012000100037

An epidemiological study of reproductive failure in dairy herds from Goiânia
Provedor de dados: 45
Autores: Andrade,J.R.A.; Silva,N.; Silveira,W.; Teixeira,M.C.C.
An epidemiological study was carried out on 2823 cows from 34 dairy herds from Goiania in the State of Goias-Brazil during 2001 to 2002. The pregnancy rate was 47.8%. In 1473 non-pregnant cows, causes of reproductive failure problems were sought. The most prevalent uterine infection was endometritis (17.0%). Uterine disorders such as partial hypoplasia of the genital system (0.04%), macerate fetus (0.01%), adhesion of ovaries (0.04%), stillbirth (0.04%), retained placenta (0.01%), cervix inflammation (0.6%) and abortion (0.88%) also were found. Uterine swabs were collected aseptically for microbiological culture. Gram positives cocci (41.3%) and Gram negatives rods (52.6%) were found, and Staphylococcus aureus and Escherichia coli were the most prevalent...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dairy herd; Endometritis; Etiology; Antimicrobial.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352005000600002

Antioxidant, antimicrobial, toxicity and analgesic properties of ethanol extract of Solena amplexicaulis root
Provedor de dados: 48
Autores: Kabir,Md Golam; Rahman,Md Monsor; Ahmed,Nazim Uddin; Fakruddin,Md; Islam,Saiful; Mazumdar,Reaz Mohammad.
BACKGROUND: This study was subjected to investigate different pharmacological properties of ethanol extract ofSolena amplexicaulis root. RESULTS: The extract contains flavonoid, alkaloid, saponin and steroid compounds. The extract exhibited excellent antioxidant activity in DPPH radical scavenging activity. The extract also showed potent activity in brine shrimp lethality bioassay. The LC50 value was found to 44.677 µg/ml. The extract showed better anti-bacterial activity against gram-negative bacteria. In antifungal assay, the maximum 79.31% of anti-mycotic activity was observed against Aspergillus ochraceus while minimum 44.2% against Rhizopus oryzae. MIC value ranged between 1500 - 3000 µg/ml. The extract was found moderately toxic with a 24-hr LD50...
Tipo: Journal article
Palavras-chave: Solena amplexicaulis; Antioxidant; Antimicrobial; Acute toxicity.
Ano: 2014
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602014000100036

Estimation of antioxidant, antimicrobial activity and brine shrimp toxicity of plants collected from Oymyakon region of the Republic of Sakha (Yakutia), Russia
Provedor de dados: 48
Autores: Paudel,Babita; Bhattarai,Hari Datta; Chan Kim,Il; Lee,Hyoungseok; Sofronov,Roman; Ivanova,Lena; Poryadina,Lena; Yim,Joung Han.
BACKGROUND: Several plants are reported to be produced various biological active compounds. Lichens from the extreme environments such as high altitude, high UV, drought and cold are believed to be synthesized unique types of secondary metabolites than the other one. Several human pathogenic bacteria and fungi have been muted into drug resistant strains. Various synthetic antioxidant compounds have posed carcinogenic effects. This phenomenon needs further research for new effective drugs of natural origin. This manuscript aimed to screen new source of biological active compounds from plants of subarctic origin. RESULTS: A total of 114 plant species, including 80 species of higher plants, 19 species of lichens and 15 species of mosses, were collected from...
Tipo: Journal article
Palavras-chave: Antimicrobial; Antioxidant; Brine shrimp; DPPH; Lichen; Moss.
Ano: 2014
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602014000100010

Antimicrobial effect of Anacardium Occidentale extract and cosmetic formulation development
Provedor de dados: 52
Autores: Gonçalves,Gisele Mara Silva; Gobbo,Juliana.
The objective of this work was to assess the activity of the extract of Anacardium occidentale Staphylococcus epidermidis and S. aureus and then to develop cosmetic formulations from those extracts. These formulations were stable in relation to their pH and rheological behavior, but were gradually darkened when stored for assessment at temperatures between 40 and 60ºC. Thus, even though the extract appeared a promising raw material for use in cosmetic formulations, those compounds might still require adjustments to improve the stability.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anacardium occidentale L; Antimicrobial; Cosmetic; Extract; Rheology.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132012000600006

Production biomolecule with inhibitory activity against Gram-negative bacteria isolated from faeces of broilers and swine
Provedor de dados: 52
Autores: Bordignon Junior,Sidnei Emílio; Miyaoka,Mitiyo Fukuda; Spier,Michele Rigon; Rubel,Rosália; Soccol,Vanete Thomaz; Soccol,Carlos Ricardo.
The aim of this study was to investigate the potential of lactic acid bacteria, bacilli and yeasts isolates to produce antimicrobial substances, especially against Gram-negative bacteria isolated from the animal faeces, searching for a new alternative to control the enteritis diseases in animal health. Evaluations were performed by microdilution in broth using crude extract obtained from the cultivation of 272 strains against Escherichia coli, S. Typhimurium, S. Enteritidis and Pseudomonas aeruginosa. Thirty-five lactic acid bacteria presented some antimicrobial action. One Lactobacillus isolate, named FLPB-1, was selected to studies the kinetics of the production. An important increase in the production was obtained when the producer strain had...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antimicrobial; Enteritis; Lactic acid bacteria; Bacteriocin.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000400011

Endophytic fungi found in association with Bacopa monnieri as potential producers of industrial enzymes and antimicrobial bioactive compounds
Provedor de dados: 52
Autores: Katoch,Meenu; Salgotra,Aseem; Singh,Gurpreet.
This study aimed to screen the endophytic fungal species of ethano-medicinal plant Bacopa monnieri (L.) Pennell for their ability to produce antimicrobial substances against Bacillus subtilis, Pseudomonas aeroginosa, Salmonella typhimurium, Escherichia coli, Klebsiella pneumonia, Staphylococcus aureus, and Candida albicans. Endophytes were also screened for their ability to produce amylase, cellulase, protease and lipase to evaluate their ecological role within the host plant. Twenty-six endophytes were isolated and seventeen were identified. All the isolated endophytes exhibited amylolytic activity. Lipolytic, cellulolytic, proteolytic activity was shown by 98, 28 and 31% isolates, respectively. Similarly, all the endophytes (100%) exhibited significant...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bacopa monnieri; Antimicrobial; ITS 5.8S rDNA; Lipase; Amylase; Endophyte.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132014000500714

Antimicrobial effect of a crude sulfated polysaccharide from the red seaweed Gracilaria ornata
Provedor de dados: 52
Autores: Amorim,Rodrigo das Neves dos Santos; Rodrigues,José Ariévilo Gurgel; Holanda,Márjory Lima; Quinderé,Ana Luíza Gomes; Paula,Regina Célia Monteiro de; Melo,Vânia Maria Maciel; Benevides,Norma Maria Barros.
The aim of this study was to determine the yield, chemical composition, specific rotation (SR), infrared (IR) spectroscopy and the effect on bacterial growth of a crude sulfated polysaccharide (SP) from the red marine alga G. ornata (Go). Go-1 (25°C), Go-2 (80°C), and Go-3 (80°C) were sequentially extracted and yielded 9.2%. The contents of sulfate (5.88-10.3%) and proteins (0.1-3.7%) were small. The values of SR were [µ]D20°f -19.0, -51.0, and -56.5, respectively. IR spectrums showed the presence of galactose-4 sulfate and absence of 3,6-anydrogalactose-2 sulfate, galactose-6 sulfate and galactose-2 sulfate. SR and IR techniques confirmed SPs. Go-3 was tested on the growth of bacteria (Bacillus subtilis, Staphylococcus aureus, Enterobacter aerogens,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Rhodophyta; Sulfated macromolecules; Chemical analysis; Antimicrobial.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132012000200001

Evaluation of Antimicrobial Activity of Glucose Oxidase from Aspergillus niger EBL-A and Penicillium notatum
Provedor de dados: 52
Autores: Zia,Muhammad Anjum; Riaz,Ayesha; Rasul,Samreen; Abbas,Rao Zahid.
This work aimed to study the production and purification of glucose oxidase by Aspergillus niger and Penicillium notatum using corn steep liquor as the substrate and evaluate its antimicrobial activity for use in pharmaceutical and food industries. The enzyme was purified by ammonium sulfate precipitation (60-85%), DEAE-cellulose ion exchange and Sephadex G-200 size exclusion chromatography. The crude enzyme extracts of A. niger and P. notatum showed 2.32 and 5.53 U mg-1 specific activities, respectively, which after desalting was 15.52 and 12.05 U mg-1, and after ion exchange and gel filtration chromatography was 29.09 - 62 and 25.72 - 59.37 U mg-1 for A. niger and P. notatum, respectively. The antimicrobial activity was determined by disc diffusion...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glucose oxidase; Antimicrobial; Aspergillus niger; Penicillium notatum.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132013000600010

Chemical Composition and Biological Activities of The Essential Oil And Anatomical Markers Of Lavandula Dentata L. Cultivated In Brazil
Provedor de dados: 52
Autores: Justus,Barbara; Almeida,Valter Paes de; Gonçalves,Melissa Marques; Assunção,Daniele Priscila da Silva Fardin de; Borsato,Debora Maria; Arana,Andres Fernando Montenegro; Maia,Beatriz Helena Lameiro Noronha Sales; Paula,Josiane de Fátima Padilha de; Budel,Jane Manfron; Farago,Paulo Vitor.
ABSTRACT Lavandula dentata, popularly known as lavender, is commonly used in traditional medicine for the treatment of digestive and inflammatory disorders. The objective of this study was to analyzed the chemical oil composition, antioxidant and antimicrobial activities of the essential oil and anatomical markers of the leaf and stem of L. dentata cultivated in South Brazil. Essential oil showed an antioxidant activity similar to rutin and gallic acid when analyzed by phosphomolybdenum method. However, by the free radical DPPH and ABTS methods, it showed a slight potential antioxidant. Essential oil presented 1,8-cineol (63%) as major component, antimicrobial activity against Gram-positive, Gram-negative bacteria strains and Candida albicans, by broth...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anatomy; Antimicrobial; Antioxidant; Lamiaceae; Quality control; Volatile oil.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132018000100441

Epidemiological and microbiological aspects of acute bacterial diarrhea in children from Salvador, Bahia, Brazil
Provedor de dados: 55
Autores: Diniz-Santos,Daniel R.; Santana,José S.; Barretto,Junaura R.; Andrade,Maria Goreth M.; Silva,Luciana R.
In the few cases of acute childhood diarrhea that require antimicrobial therapy, the correct choice of the drug depends on detailed previous knowledge of local strains. In order to establish such parameters in our city, we reviewed the results of all 260 positive stool cultures of children between 0 and 15 years of age during two years at a pediatric tertiary care facility in Salvador, Brazil. Bacterial strains had been presumptively identified by culturing in selective media and by biochemical testing, and their antimicrobial susceptibility patterns were automatically detected by the MicroScan Walkaway System. Data about patients' sex and age, monthly distribution of the cases, pathogens isolated and their antimicrobial resistance patterns were recorded....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Diarrhea; Antimicrobial; Resistance; Children; Epidemiology.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702005000100013

Toxic, antimicrobial and hemagglutinating activities of the purple fluid of the sea hare Aplysia dactylomela Rang, 1828
Provedor de dados: 56
Autores: Melo,V.M.M.; Fonseca,A.M.; Vasconcelos,I.M.; Carvalho,A.F.F.U.
The antimicrobial, hemagglutinating and toxic activities of the purple fluid of the sea hare Aplysia dactylomela are described. Intact or dialyzed purple fluid inhibited the growth of species of Gram-positive and Gram-negative bacteria and the action was not bactericidal but bacteriostatic. The active factor or factors were heat labile and sensitive to extreme pH values. The fluid preferentially agglutinated rabbit erythrocytes and, to a lesser extent, human blood cells, and this activity was inhibited by the glycoprotein fetuin, a fact suggesting the presence of a lectin. The fluid was also toxic to brine shrimp nauplii (LD50 141.25 µg protein/ml) and to mice injected intraperitoneally (LD50 201.8 ± 8.6 mg protein/kg), in a dose-dependent fashion. These...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aplysia; Antimicrobial; Purple fluid; Toxicity; Hemagglutinating activity.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1998000600010

Antimicrobial and toxicological studies of some metal complexes of 4-methylpiperazine-1-carbodithioate and phenanthroline mixed ligands
Provedor de dados: 58
Autores: Kalia,S.B.; Kaushal,G.; Kumar,M.; Cameotra,S.S.; Sharma,A.; Verma,M.L.; Kanwar,S.S.
A few mixed ligand transition metal carbodithioate complexes of the general formula [M(4-MPipzcdt)x(phen)y]Y (M = Mn(II), Co(II), Zn(II); 4-MPipzcdt = 4-methylpiperazine-1-carbodithioate; phen = 1,10-phenanthroline; x = 1 and y = 2 when Y = Cl; x = 2 and y = 1 when Y = nil) were synthesized and screened for their antimicrobial activity against Candida albicans, Escherichia coli, Pseudomonas aeruginosa,Staphylococcus aureus andEnterococcusfaecalis by disk diffusion method. All the complexes exhibited prominent antimicrobial activity against tested pathogenic strains with the MIC values in the range &lt;8-512 μgmL-1. The complexes [Mn(4-MPipzcdt)2(phen)] and [Co(4-MPipzcdt)(phen)2]Cl inhibited the growth of Candida albicans at a concentration as low as 8...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antimicrobial; Metal ions; 4-methylpiperazine-1-carbodithioate; MIC; Zone of inhibition.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822009000400024

The antimicrobial efficacy of Lippia alba essential oil and its interaction with food ingredients
Provedor de dados: 58
Autores: Machado,Terezinha Feitosa; Nogueira,Nádia Accioly P.; Pereira,Rita de Cássia Alves; Sousa,Cívita Teixeira de; Batista,ValériaChaves Vasconcelos.
The objective of this study was to evaluate the antimicrobial potential of Lippia alba essential oil (EOLa) and to investigate the effect of food ingredients on its efficacy. The antimicrobial potential of the oil was determined by the presence or absence of inhibition zones, minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) against Escherichia coli, Listeria innocua, Listeria monocytogenes, Pseudomonas aeruginosa, Salmonella choleraesuis and Staphylococcus aureus. The effect of food ingredients and the pH on the antimicrobial efficacy of oil was assessed by monitoring the maximum growth rate of Listeria monocytogenes in model media. The model media included potato starch (0, 1, 5 or 10%), beef extract (1, 5, 3, 6 or 12%),...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Essential oil; Antimicrobial; Food ingredient.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000200045

Influence of subinhibitory concentrations of antimicrobials on hydrophobicity, adherence and ultra-structure of Fusobacterium nucleatum
Provedor de dados: 58
Autores: Okamoto,Ana C.; Gaetti-Jardim Jr.,Elerson; Arana-Chavez,Victor E.; Avila-Campos,Mario J.
Fusobacterium nucleatum is considered a bridge organism between earlier and later colonizers in dental biofilms and a putative periodontopathogen. In Dentistry, antimicrobial agents are used for treatment and control of infectious diseases associated with dental plaque. Antiseptics have been used in association with antibiotics to reduce infections after oral surgeries. In this study, the influence of subinhibitory concentrations (SC) of chlorhexidine, triclosan, penicillin G and metronidazole, on hydrophobicity, adherence to oral epithelial cells, and ultra-structure of F. nucleatum was examined. All isolates were susceptible to chlorhexidine, triclosan, and metronidazole; however, most of the isolates were susceptible to penicillin G, and all of them...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fusobacterium nucleatum; Hydrophobicity; Adherence; Antimicrobial; Ultra-structure.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822002000200017

Antimicrobial activity of some medicinal plants from the cerrado of the central-western region of Brazil
Provedor de dados: 58
Autores: Violante,Ivana Maria Póvoa; Hamerski,Lidilhone; Garcez,Walmir Silva; Batista,Ana Lucia; Chang,Marilene Rodrigues; Pott,Vali Joana; Garcez,Fernanda Rodrigues.
Ethanol extracts from six selected species from the Cerrado of the Central-Western region of Brazil, which are used in traditional medicine for the treatment of infectious diseases and other medical conditions, namely Erythroxylum suberosum St. Hil. (Erythroxylaceae), Hyptis crenata Pohl. ex Benth. (Lamiaceae), Roupala brasiliensis Klotz. (Proteaceae), Simarouba versicolor St. Hil. (Simaroubaceae), Guazuma ulmifolia Lam. (Sterculiaceae) and Protium heptaphyllum (Aubl.) March. (Burseraceae), as well as fractions resulting from partition of these crude extracts, were screened in vitro for their antifungal and antibacterial properties. The antimicrobial activities were assessed by the broth microdilution assay against six control fungal strains, Candida...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antifungal; Antibacterial; Antimicrobial; Artemia salina; Cerrado.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000400009

EMJH medium with 5-fluorouracil and nalidixic acid associated with serial dilution technique used to recover Leptospira spp from experimentally contaminated bovine semen
Provedor de dados: 58
Autores: Miraglia,Fabiana; Moraes,Zenaide Maria de; Melville,Priscilla Anne; Dias,Ricardo Augusto; Vasconcellos,Silvio Arruda.
Bovine semen experimentally contaminated with Leptospira santarosai serovar Guaricura was submitted to the modified EMJH medium with 5-fluorouracil (300mg/L) and nalidixic acid (20mg/L), named as "selective medium" and using the serial dilution technique, in order to evaluate the percentage of recovery of the added microorganism. The selective EMJH medium was found with higher percentage of recovery of leptospiras and minor losses of samples due to contamination with opportunistic microorganisms than the non-selective EMJH medium: 151/376 (40.0%) of positive growth; and 38/376 (10.0%) contamination and 58/376 (15%) and 129/376 (34.0%), respectively. These results were statistically significant (p&lt;0. 0001; Fisher). Differences were found when the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Leptospires; Culture media; Antimicrobial; Isolation; Semen.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822009000100033

Antimicrobial activity of allylic thiocyanates derived from the Morita-Baylis-Hillman reaction
Provedor de dados: 58
Autores: Sá,Marcus Mandolesi; Ferreira,Misael; Lima,Emerson Silva; Santos,Ivanildes dos; Orlandi,Patrícia Puccinelli; Fernandes,Luciano.
Bacterial resistance to commonly used antibiotics has been recognized as a significant global health issue. In this study, we carried out the screening of a family of allylic thiocyanates for their action against a diversity of bacteria and fungi with a view to developing new antimicrobial agents. Allylic thiocyanates bearing halogenated aryl groups, which were readily obtained in two steps from the Morita-Baylis-Hillman adducts, showed moderate-to-high activity against selective pathogens, including a methicillin-resistant S. aureus (MRSA) strain. In particular cases, methyl (Z)-3-(2,4-dichlorophenyl)-2-(thiocyanomethyl)-2-propenoate exhibited antimicrobial activity comparable to the reference antibiotic Imipenem.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antimicrobial; Allylic thiocyanate; Morita-Baylis-Hillman reaction; MRSA.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000300007

Antimicrobial resistance and PCR-ribotyping of Shigella responsible for foodborne outbreaks occurred in southern Brazil
Provedor de dados: 58
Autores: Paula,Cheila Minéia Daniel de; Geimba,Mercedes Passos; Amaral,Patrícia Heidrich do; Tondo,Eduardo Cesar.
Little information about Shigella responsible for foodborne shigellosis is available in Brazil. The present study aimed to investigate the antimicrobial resistance and PCR-ribotyping patterns of Shigella isolates responsible for foodborne outbreaks occurred in Rio Grande do Sul State (RS), Southern Brazil in the period between 2003 and 2007. Shigella strains (n=152) were isolated from foods and fecal samples of victims of shigellosis outbreaks investigated by the Surveillance Service. Identification of the strains at specie level indicated that 71.1% of them were S. flexneri, 21.5% S. sonnei, and 0.7% S. dysenteriae. Ten strains (6.7%) were identified only as Shigella spp. An increasing occurrence of S. sonnei was observed after 2004. Most of the strains...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Shigellosis; Shigella; Antimicrobial; PCR-Ribotyping; RS/Brazil.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822010000400015

Antimicrobial potential of pyroligneous extracts – a systematic review and technological prospecting
Provedor de dados: 58
Autores: Souza,Juliana Leitzke Santos de; Guimarães,Victoria Burmann da Silva; Campos,Angela Diniz; Lund,Rafael Guerra.
Abstract Pyroligneous extract is applied in diverse areas as an antioxidant, an antimicrobial, and an anti-inflammatory agent. The discovery of new cost-effective antimicrobial agents of natural origin remains a challenge for the scientific community. This study aimed to conduct a systematic review and a technological forecasting of the existent evidence regarding the use of pyroligneous extract as a potential antimicrobial agent. Studies were identified through an investigation of various electronic databases: PubMed, SciFinder, Web of Science, Scopus, Scielo, Google scholar, and ProQuest. Patents were searched through INPI, Google patents, Espacenet, Patents online, USPTO, and WIPO. The literature on antimicrobial activity of pyroligneous extract are...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Food preservation; Antimicrobial; Infections; Preservative; Pharmaceutical.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822018000500128

Isolation, Purification and Evaluation of Antibacterial Agents from Aloe vera
Provedor de dados: 58
Autores: Lawrence,Rubina; Tripathi,Priyanka; Jeyakumar,Ebenezer.
The ethanol, methanol and acetone extracts of Aloe vera gel were studied for their antimicrobial activity against four Gram-positive and Gram-negative bacteria using agar well diffusion method. The extracts showed varied levels of antimicrobial activity against the tested pathogens. The ethanol and methanol extracts showed higher activity while acetone extract, showed least or no activity against most of the tested pathogens. Fractions obtained from the extracts by Thin Layer and Column Chromatography were studied for their antagonistic properties using Spot Assay Technique. Compounds with maximum antibacterial activity isolated from the ethanol and methanol extracts were identified as p - coumaric acid (Mol. wt.165), ascorbic acid (Mol. wt.177 ),...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aloe vera; Gel; Antimicrobial; Compounds.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822009000400023

Analysis of bacterial communities and characterization of antimicrobial strains from cave microbiota
Provedor de dados: 58
Autores: Yasir,Muhammad.
Abstract In this study for the first-time microbial communities in the caves located in the mountain range of Hindu Kush were evaluated. The samples were analyzed using culture-independent (16S rRNA gene amplicon sequencing) and culture-dependent methods. The amplicon sequencing results revealed a broad taxonomic diversity, including 21 phyla and 20 candidate phyla. Proteobacteria were dominant in both caves, followed by Bacteroidetes, Actinobacteria, Firmicutes, Verrucomicrobia, Planctomycetes, and the archaeal phylum Euryarchaeota. Representative operational taxonomic units from Koat Maqbari Ghaar and Smasse-Rawo Ghaar were grouped into 235 and 445 different genera, respectively. Comparative analysis of the cultured bacterial isolates revealed distinct...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Caves; 16S ribosomal RNA; Microbiota; Antimicrobial; Sediments.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822018000200248

New antimicrobial combinations: substituted chalcones- oxacillin against methicillin resistant Staphylococcus aureus
Provedor de dados: 58
Autores: Talia,Juan Manuel; Debattista,Nora Beatriz; Pappano,Nora Beatriz.
Staphylococcus aureus, the most virulent Staphylococcus species, is also the prevalent pathogen isolated from hospitalized patients and the second most common from patients in outpatient settings. In general, bacteria have the genetic ability to transmit and acquire resistance to drugs, which are utilized as therapeutic agents. Related studies of antimicrobial activity indicate that crude extracts containing flavonoids, triterpenes and steroids have showed significative activity against several Staphylococcus aureus strains. Combination effects between flavonoids and antibiotics also have been reported. The aim of the present work was to investigate in vitro synergism between several chalcones substituted in combination with oxacillin, an antibiotic used...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Substituted chalcones; Oxacillin; Combinations; Antimicrobial; S. aureus.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822011000200010

Chemical composition and bioactivity of methanolic extract obtained from Lepista sordida
Provedor de dados: 60
Autores: Acharya,Krishnendu; Ghosh,Sandipta; Biswas,Rhituparna.
The present study aimed at the evaluation of chemical composition and bioactive potential of methanolic extract obtained from Lepista sordida in terms of antioxidative and antimicrobial efficacy. The macrofungus is recognized for its high nutritional value and medicinal properties. However, to the best of our knowledge bioactivity of its methanolic extract is yet to be explored. In this investigation, quantitative analysis of mycochemicals revealed the extract contained significant amount of phenolic compounds such as phenols and flavonoids. Ascorbic acid was found in higher amount than β carotene and lycopene which were present in vestigial amounts. A phenolic profile was also determined using high performance liquid chromatography that further confirmed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antimicrobial; Free radical scavenger; High performance liquid chromatography; Mycotaxon; Mycochemicals.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502019000100600

Design and characterization of nanocarriers loaded with Levofloxacin for enhanced antimicrobial activity; physicochemical properties, in vitro release and oral acute toxicity
Provedor de dados: 60
Autores: Siafaka,Panoraia; Okur,Mehmet Evren; Ayla,Şule; Er,Sevda; Cağlar,Emre Şefik; Okur,Neslihan Üstündağ.
Inorganic and carbon based nanomaterials are widely used against several diseases, such as cancer, autoimmune diseases as well as fungi and bacteria colonization. In this work, Santa Barbara Amorphous mesoporous silica (SBA), Halloysite Nanotubes (HNTs) and Multiwalled Carbon Nanotubes (CNTs) were loaded with fluoroquinolone Levofloxacin (LVF) to be applied as antimicrobial agents. The prepared via adsorption nanocarriers were characterized by Fourier-Transformed Spectroscopy, Scanning Electron Microscopy as well as High Pressure liquid Chromatography. In vitro release studies were carried out using Simulated Body Fluid at 37oC and data analyzed by various kinetic models showing slow dissolution over 12-24 hours. Antimicrobial studies showed improved...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Carbon nanotubes; Santa barbara amorphous; Halloysite nanotubes; Levofloxacin; Toxicity; Antimicrobial.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502019000100514

Screening and identification of bacteriocin-like inhibitory substances producing lactic acid bacteria from fermented products
Provedor de dados: 116
Autores: CHOEISOONGNERN,Thiwanya; SIVAMARUTHI,Bhagavathi Sundaram; SIRILUN,Sasithorn; PEERAJAN,Sartjin; CHOISET,Yvan; RABESONA,Hanitra; HAERTLÉ,Thomas; CHAIYASUT,Chaiyavat.
Abstract A total of 544 isolates of lactic acid bacteria isolated from fermented products: 451 isolates from fermented products from Thailand and 93 isolated from French fermented products were screened for bacteriocin production. 10 isolates showed antimicrobial activities. Identification of the selected strains by random amplification of polymorphic DNA-polymerase change reaction using the primers E1, E2 and M13 showed three different RAPD patterns. One of the isolates from each product was chosen and good antimicrobial activity were displayed by 3 strains including MP6/2, PKS2-1 and OV1-1 producing in MRS broth bacteriocin-like substance (BLIS) inhibiting Candida albicans ATCC 90028, Carnobacterium maltraromaticum NCDO 2760, Lactobacillus sakei subsp....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lactic acid bacteria; Bacteriocin; Fermented food products; Antimicrobial.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612019005031114

Impact of whey protein isolate coatings containing different antimicrobial agents on sliced bologna-type sausage during refrigerated storage
Provedor de dados: 116
Autores: KALKAN,Selin; ERGİNKAYA,Zerrin.
Abstract In this study, we aimed to determine the possibility of using the edible whey protein isolates coatings containing different antimicrobial agents on the bologna-type sausage slices and the inactivation effects of these coatings against Listeria innocua. For this purpose, edible whey protein isolates (WPI) coatings were prepared to contain essential oils (thyme, coriander, pimento, rosemary, basil), potassium sorbate (PS), sodium benzoate (SB)(4% w/v) and Nisin(10.000 IU). The antimicrobial effect against L. innocua, sensory characteristics (appearance, color, odor, texture, flavor and overall acceptability) and physical (color) and chemical (pH and water activity) properties of bologna slices coated WPI coatings were determined for during the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Edible coatings; Antimicrobial; Listeria innocua; Whey protein isolate; Food packaging.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612019005024102

Molecular characterization and evaluation of antimicrobial susceptibility of enteropathogenic E. coli (EPEC) isolated from minas soft cheese
Provedor de dados: 116
Autores: Dias,Mariana Tavares; Bricio,Silvia Maria Lopes; Almeida,Davi Oliveira; Oliveira,Luiz Antônio Trindade; de Filippis,Ivano; Marin,Victor Augustus.
Foodborne disease caused by microorganisms is a problem of public health. Minas soft cheese is a national product manufactured using simple technology; it has high level of acceptance in the country making its production an important economic activity. Many microorganisms may be present in foods including the bacterium Escherichia coli (E. coli). Overall, E. coli is a harmless commensal bacterium; however, some strains may have a pathogenic potential. Several outbreaks of foodborne diseases associated with consumption of contaminated cheese have been reported, and the presence of pathogenic strains of E. coli has increased. The objective of this study was to isolate, evaluate the antimicrobial susceptibility, and characterize, by Multiplex PCR, the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Minas soft cheese; EPEC; Antimicrobial.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612012000400017

Purification, partial characterization and antimicrobial activity of Lectin from Chenopodium Quinoa seeds
Provedor de dados: 116
Autores: POMPEU,Dávia Guimarães; MATTIOLI,Marcelo Augusto; RIBEIRO,Rosy Iara Maciel de Azambuja; GONÇALVES,Daniel Bonoto; MAGALHÃES,Juliana Teixeira de; MARANGONI,Sérgio; SILVA,José Antônio da; GRANJEIRO,Paulo Afonso.
Abstract A novel lectin was isolated from the seeds of Chenopodium quinoa. To achieve this end, the crude extract from the quinoa was submitted to two purification steps, Sephadex G50 and Mono Q. The hemagglutinating activity showed that this lectin agglutinates human erythrocytes. Its activity is inhibited by glucose and mannose, and remained stable under a wide range of pH levels and temperatures. The quinoa lectin was found to be a heterodimeric lectin of approximately 60 kDa, consisting of two subunits of approximately 25 kDa and 35 kDa. This lectin had its antimicrobial activity tested against several bacteria strains and effectively inhibited three strains. These strains were all Gram-negative, making this lectin a promising antimicrobial tool.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antimicrobial; Chenopodium quinoa; Glucose/mannose-specific; Lectin; Seeds.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612015000400696

Influence of temperature and packaging type on quality parameters and antimicrobial properties during Yateí honey storage
Provedor de dados: 116
Autores: MARTÍNEZ,Ramón Alejandro; SCHVEZOV,Natasha; BRUMOVSKY,Luis Alberto; ROMÁN,Amada Beatriz Pucciarelli.
Abstract Tetragonisca fiebrigi, is a bee of the subfamily Meliponidae traditionally known as Yateí. Its honey differs from the honey produced by Apis mellifera because it is less viscous, more acidic, has sweetness and particular aromas. It is important to know the behavior of yatei honey in different storage conditions, in order to preserve the characteristics of the honey and ensure the product as harmless. The objective was to determine the influence of temperature, packaging type and storage time of Yateí honey on antimicrobial properties, microbial (Total Mesophilic Aerobic and Mold and Yeast Count) and physicochemical parameters (pH, hydroxymethylfurfural (HMF), acidity, moisture content and diastase), with methodology of national and international...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Yatei honey; Quality; Antimicrobial; Container; Plastic; Glass.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612018000500196

Moringa oleifera inhibits growth of Candida spp. and Hortaea werneckii isolated from Macrobrachium amazonicum prawn farming with a wide margin of safety
Provedor de dados: 65
Autores: Rocha,Marcos Fábio Gadelha; Alencar,Lucas Pereira de; Brilhante,Raimunda Sâmia Nogueira; Sales,Jamille de Alencar; Ponte,Yago Brito de; Rodrigues,Pedro Henrique de Aragão; Sampaio,Célia Maria de Souza; Cordeiro,Rossana de Aguiar; Castelo-Branco,Débora de Souza Collares Maia; Oliveira,Francisco Carlos de; Barbosa,Francisco Geraldo; Teixeira,Carlos Eduardo Cordeiro; Paiva,Manoel de Araújo Neto; Bandeira,Tereza de Jesus Pinheiro Gomes; Moreira,José Luciano Bezerra; Sidrim,José Júlio Costa.
This study aimed to evaluate the antifungal activity of M. oleifera extracts against fungi isolated from farmed prawns and test the toxicity of the extracts on larvae of Macrobrachium amazonicum. The ethanol extracts of pods, seeds, leaves, stems and flowers and chloroform extract of flowers of M. oleifera were tested against 14 strains of Candida spp. and 10 strains of Hortaea werneckii isolated from farming water and the digestive tract of M. amazonicum. Antifungal activity was determined by microdilution, based on the M27-A3 and M38-A2 CLSI documents. Toxicity was evaluated by exposing larvae of M. amazonicum at concentrations between 10-1000mg mL-1, counting dead larvae (CL50) after 24 hours. The best results were verified with the chloroform extract...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aquaculture; Fungi; Prawn; Moringa oleifera; Antimicrobial.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782014001202197

Phytochemical screening and antimicrobial activity testing of crude hydroalcoholic extract from leaves of Sphagneticola trilobata (Asteraceae)
Provedor de dados: 65
Autores: Leite,Ana Greice Borba; Farias,Eulina Tereza Nery; Oliveira,Ana Paula de; Abreu,Ruan Emmanuell Franco de; Costa,Mateus Matiuzzi da; Almeida,Jackson Roberto Guedes da Silva; Estevão,Lígia Reis de Moura; Evêncio-Neto,Joaquim.
ABSTRACT:  This study aimed to perform phytochemical analysis and to test the antimicrobial activity of the crude hydroalcoholic extract obtained from the leaves of Sphagneticola trilobata. Classes of secondary metabolites present in the extract were identified through phytochemical screening using analytical thin-layer chromatography. Antimicrobial activity was evaluated by testing cultures of Staphylococcus aureus, S. epidermidis, Staphylococcus spp., Escherichia coli, Serratia marcescens, Enterococcus faecalis, Pseudomonas aeruginosa, Salmonella Typhimurium, and Klebsiella pneumoniae isolated from human skin and those of Staphylococcus spp. isolated from dog skin using the broth microdilution method. In the phytochemical screening, classes of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antimicrobial; Phytochemical Screening; Phenolic compounds.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000400452

Intein-mediated expression of cecropin in Escherichia coli
Provedor de dados: 69
Autores: Díaz,Mauricio; Venturini,Elena; Marchetti,Stefano; Arenas,Gloria; Marshall,Sergio H.
Different strategies have been used to overcome the difficulties to produce antimicrobial peptides. Here we used Intein Mediated Purification with an Affinity Chitin-binding Tag (IMPACT-System, New England Biolabs) for the expression of the antimicrobial peptide cecropin to reduce its sensitivity to intracellular proteases and use its inducible self-cleaving capability to remove the carrier. Cecropin was cloned into suitable expression vector pTYB11, and expression induced by IPTG in Escherichia coli ER2566. The use of 22ºC induction allowed the expression of cecropin with its intein carrier in soluble form. Cell extracts were purified by chitin affinity chromatography and intein-mediated splicing of the target protein was achieved by thiol addition,...
Tipo: Journal article
Palavras-chave: Antimicrobial; Cecropin; Fusion; Intein; Peptide; Soluble.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582012000200003

Antimicrobial and molecular interaction studies on derivatives of curcumin against Streptococcus pneumoniae which caused pneumonia
Provedor de dados: 69
Autores: Li,Liang-Mei; Li,Jun; Zhang,Xiu-Ying.
Background: The antimicrobial properties and molecular interaction analysis of curcumin and its derivatives against three different strains of Streptococcus pneumoniae (Penicillin-susceptible, Penicillin-intermediate and Penicillin-resistant) are studied. Results: These properties were analyzed based on the measurement of the inhibition zone, minimum inhibitory concentration (MIC), and rate of kill revealed that curcumin monoglucoside, curcumin diglucoside and curcumin possessed strong antimicrobial properties even on the Penicillin-resistant strains. Additionally, the molecular docking simulation analyses against Penicillin Binding Protein of S. pneumoniae also confirm that these compounds docked at the active site of the enzyme. Further, the molecular...
Tipo: Journal article
Palavras-chave: Antimicrobial; Curcumin; MIC; Molecular docking; Penicillin-resistant.
Ano: 2016
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582016000100002

Antibacterial activity of the Antarctic bacterium Janthinobacterium sp: SMN 33.6 against multi-resistant Gram-negative bacteria
Provedor de dados: 69
Autores: Asencio,Geraldine; Lavin,Paris; Alegría,Karen; Domínguez,Mariana; Bello,Helia; González-Rocha,Gerardo; González-Aravena,Marcelo.
Background The increment of resistant strains to commonly used antibiotics in clinical practices places in evidence the urgent need to search for new compounds with antibacterial activity. The adaptations that Antarctic microorganisms have developed, due to the extreme environment that they inhabit, promote them as a potential new source of active compounds for the control of microorganisms causing infections associated with health care. The aim of this study was to evaluate the antibacterial activity of an ethanol extract of the Antarctic bacterium Janthinobacterium sp., strain SMN 33.6, against nosocomial multi-resistant Gram-negative bacteria. Results Inhibitory activity against human Gram-negative bacterial pathogens, with concentrations that varied...
Tipo: Journal article
Palavras-chave: Antarctica; Antimicrobial; Antibiotic resistance; Bacterial pigment.
Ano: 2014
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582014000100001

Atividade antimicrobiana do óleo essencial de capim-limão contra Salmonella Typhimurium em repolho.
Provedor de dados: 14
Autores: MACHADO, T. F.; PEREIRA, R. de C. A.; REBOUÇAS, J. de O.; PONTES, C. M.; XAVIER, T. F.
Tipo: Folhetos
Palavras-chave: Antimicrobiano; Sanitização; Antimicrobial; Essential oil; Óleo Essencial; Cymbopogon citratus.
Ano: 2013
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/981606

Evidence of a bactericidal permeability increasing protein in an invertebrate, the Crassostrea gigas Cg-BPI
Provedor de dados: 5
Autores: Gonzalez, Marcelo; Gueguen, Yannick; Destoumieux Garzon, Delphine; Romestand, Bernard; Fievet, Julie; Pugniere, M; Roquet, F; Escoubas, Jean-michel; Vandenbulcke, F; Levy, O; Saune, Laure; Bulet, P; Bachere, Evelyne.
A cDNA sequence with homologies to members of the LPS-binding protein and bactericidal/permeability-increasing protein (BPI) family was identified in the oyster Crassostrea gigas. The recombinant protein was found to bind LIPS, to display bactericidal activity against Escherichia coli, and to increase the permeability of the bacterial cytoplasmic membrane. This indicated that it is a BPI rather than an LPS-binding protein. By in situ hybridization, the expression of the C gigas BPI (Cg-bpi) was found to be induced in hemocytes after oyster bacterial challenge and to be constitutive in various epithelia of unchallenged oysters. Thus, Cg-bpi transcripts were detected in the epithelial cells of tissues/organs in contact with the external environment (mantle,...
Tipo: Text
Palavras-chave: Oyster innate immunity; Mollusk; Hemocyte; Epithelia; Antimicrobial.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-3564.pdf

Use of Natural Antimicrobial Peptides and Bacterial Biopolymers for Cultured Pearl Production
Provedor de dados: 5
Autores: Simon-colin, Christelle; Gueguen, Yannick; Bachere, Evelyne; Kouzayha, Achraf; Saulnier, Denis; Gayet, Nicolas; Guezennec, Jean.
Cultured pearls are the product of grafting and rearing of Pinctada margaritifera pearl oysters in their natural environment. Nucleus rejections and oyster mortality appear to result from bacterial infections or from an inappropriate grafting practice. To reduce the impact of bacterial infections, synthetic antibiotics have been applied during the grafting practice. However, the use of such antibiotics presents a number of problems associated with their incomplete biodegradability, limited efficacy in some cases, and an increased risk of selecting for antimicrobial resistant bacteria. We investigated the application of a marine antimicrobial peptide, tachyplesin, which is present in the Japanese horseshoe crab Tachypleus tridentatus, in combination with...
Tipo: Text
Palavras-chave: Pearl oyster; Exopolysaccharide; Tachyplesin; Antimicrobial.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00275/38599/37128.pdf

Reduction of potential ennoblement of stainless steel in natural seawater by an ecofriendly biopolymer
Provedor de dados: 5
Autores: Abi Nassif, L.; Rioual, S.; Farah, W.; Hellio, C.; Fauchon, M.; Trepos, R; Abboud, M.; Diler, E.; Thierry, D.; Lescop, B.
The effect of biofilm formation on passive stainless steel in seawater environments is of primary importance since it leads to potential ennoblement of surfaces and subsequently to localized corrosion such as pitting and crevice corrosion. This study aims at developing an ecofriendly alginate biopolymer containing both non-toxic calcium and a limited amount of biocidal zinc ions which inhibits this effect. For this purpose, calcium alginate containing less than 1 % of zinc ions localized in the vicinity of the steel surface in natural and renewed seawater is demonstrated to reduce significantly the ennoblement process of steel. After 1 month of immersion, a mass loss of only 4 % of the active material is observed authorizing thereby long-term protection of...
Tipo: Text
Palavras-chave: Biopolymer; Steel; Ennoblement; Antimicrobial; Alginate; Biofilm.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00604/71607/73083.pdf

Antimicrobial Compounds from Eukaryotic Microalgae against Human Pathogens and Diseases in Aquaculture
Provedor de dados: 5
Autores: Falaise, Charlotte; Francois, Cyrille; Travers, Marie-agnes; Morga, Benjamin; Haure, Joel; Tremblay, Rejean; Turcotte, Francois; Pasetto, Pamela; Gastineau, Romain; Hardivillier, Yann; Leignel, Vincent; Mouget, Jean-luc.
The search for novel compounds of marine origin has increased in the last decades for their application in various areas such as pharmaceutical, human or animal nutrition, cosmetics or bioenergy. In this context of blue technology development, microalgae are of particular interest due to their immense biodiversity and their relatively simple growth needs. In this review, we discuss about the promising use of microalgae and microalgal compounds as sources of natural antibiotics against human pathogens but also about their potential to limit microbial infections in aquaculture. An alternative to conventional antibiotics is needed as the microbial resistance to these drugs is increasing in humans and animals. Furthermore, using natural antibiotics for...
Tipo: Text
Palavras-chave: Biological activity; Antimicrobial; Antibacterial; Antifungal; Antiviral; Biological activity; Haslea; Microalgae; Sustainable aquaculture.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00349/46052/45719.pdf

Improving the Antioxidant Properties of Calophyllum inophyllum Seed Oil from French Polynesia: Development and Biological Applications of Resinous Ethanol-Soluble Extracts
Provedor de dados: 5
Autores: Cassien, Mathieu; Mercier, Anne; Thétiot-laurent, Sophie; Culcasi, Marcel; Ricquebourg, Emilie; Asteian, Alice; Herbette, Gaëtan; Bianchini, Jean-pierre; Raharivelomanana, Phila; Pietri, Sylvia.
Tamanu oil from Calophyllum inophyllum L. has long been used in traditional medicine. Ethanol extraction was found the best strategy for recovering bioactive compounds from the resin part of Tamanu oil, yielding two neutral and acidic resins fractions with high phenolics, flavonoids and pyranocoumarins concentrations. A further cascade of LPLC/HPLC separations of neutral and acidic resin fractions allowed identifying fifteen metabolites, and among them, calanolide D and 12-oxocalanolide A (both in neutral fraction) were first identified from a natural source. All these extracts, subfractions and isolated metabolites demonstrated increased free radical scavenging, antioxidant, anti-inflammatory, antimicrobial and antimycobacterial activity compared to...
Tipo: Text
Palavras-chave: Calophyllum inophyllum L; Tamanu oil; Ethanol-soluble resin extracts; Lipophilic antioxidants; Phenolics; Pyranocoumarins; Antimicrobial; Anti-inflammatory; UV protection; EPR spin trapping.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00677/78918/81283.pdf

Differential distribution and defence involvement of antimicrobial peptides in mussel
Provedor de dados: 5
Autores: Mitta, Guillaume; Vandenbulcke, Franck; Noel, Thierry; Romestand, Bernard; Beauvillain, Jean Claude; Salzet, Michel; Roch, Philippe.
In previous papers, we characterised 3 types of 4-kDa, cysteine-rich, cationic antimicrobial peptides: MGDs (for Mytilus galloprovincialis defensins), mytilins and myticins, which are abundant in the mussel hemocytes. In the present work, me revealed a differential distribution of the cells expressing the different genes. In addition, using confocal and electron microscopy, we confirmed that defensins and mytilins were partially located in different sub-types of circulating hemocytes although the peptides can be located in the same cell, and even in the same granule. We also demonstrated that mytilins exert their microbicidal effect within the cells through the process of phagosome-mytilin granule fusion leading to the co-location of ingested bacteria and...
Tipo: Text
Palavras-chave: Innate immunity; Hemocyte; Mussel; Myticin; Mytilin; Defensin; Antimicrobial.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/2000/publication-413.pdf

Potential use of antibiotic to improve performance of laboratory-reared Nezara viridula (L.) (Heteroptera: Pentatomidae)
Provedor de dados: 82
Autores: Hirose,Edson; Panizzi,Antônio R.; Cattelan,Alexandre J.
The antibiotic streptomycin added to the drinking water at a concentration of 125 mg/l during nymphal development of Nezara viridula (L.) (Heteroptera: Pentatomidae)accelerated the development in ca. 2 days, increased survivorship, and doubled adult longevity; nymph survivorship and adult body weight were not affected when compared to control insects. Streptomycin has potential in rearing N. viridula, especially in improving quality of field-collected adults, by mitigating the introduction of pathogenic bacteria, and improving the quality of the population.
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Stink bug; Rearing; Antimicrobial.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2006000200022

Ants as carriers of antibiotic-resistant bacteria in hospitals
Provedor de dados: 82
Autores: Moreira,Denise D.O.; Morais,Verônica de; Vieira-da-Motta,Olney; Campos-Farinha,Ana E. de C.; Tonhasca Jr.,Athayde.
The presence of antimicrobial-resistant bacteria and carried by ants isolated from hospitals was investigated in Campos dos Goytacazes, RJ, Brazil. Three health institutions were visited from 2001 to 2002 and samples were collected within critical areas of medical care based on criteria of greater risk of patient hospital acquired-infection. Four ant species were identified, Tapinoma melanocephalum (Fabricius)(63.1%), Paratrechina longicornis (Latreille)(21.1%), Monomorium pharaonis (L.)(10.5%), and Solenopsis saevissima (S. Smith)(5.3%) carrying 21 species of bacteria. The tests for bacteria species identification and antimicrobial-resistance profile were carried out by using standardized kits and evaluated by automated equipment. Among the bacteria...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nosocomial infection; Antimicrobial; Control; Urban ant.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2005000600017

Phenotypic and genotypic resistance profile of Salmonella Typhimurium to antimicrobials commonly used in poultry
Provedor de dados: 89
Autores: Biffi,CP; Stefani,LM; Miletti,LC; Matiello,CA; Backes,RG; Almeida,JM; Neves,GB.
Isolates of Salmonella sp (104) from poultry samples were isolated and serotyped where eleven were identified as Salmonella Typhimurium (ST). ST isolates were phenotypically tested by disk diffusion and minimum inhibitory concentration (MIC). Four genes related to enrofloxacin (GyrA, GyrB, ParC and ParE), two to gentamicin (AadA and AadB) and two to ceftiofur (BlaCMY-2 and AmpC) resistance were searched by PCR. Our results showed ST resistance to all three antibiotics tested (18.1% for ceftiofur, 45.4% for gentamicin, and 18.1% for enrofloxacin) according to the diffusion test. In the MIC test, the ST isolates showed higher levels of resistance (27.2% for ceftiofur, 54.5% for gentamicin, and 18.2% for enrofloxacin). Three resistance genes out of four...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antimicrobial; Gene; Resistance; Salmonella.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2014000200013

Evaluation of olive leaf extract as a growth promoter on the performance, blood biochemical parameters, and caecal microflora of broiler chickens
Provedor de dados: 96
Autores: Erener,Guray; Ocak,Nuh; Ozturk,Ergin; Cankaya,Soner; Ozkanca,Resit; Altop,Aydın.
ABSTRACT The objective of the study was to examine the effects of an alcoholic liquid olive leaf extract (OLE) obtained from fresh leaves on the growth performance, carcass weight, caecal microflora, and some plasma variables, such as triglycerides, total cholesterol, high-density lipoprotein (HDL), and low-density lipoprotein (LDL) cholesterol in broiler chickens. A total of 375 one-day-old male broilers (Ross 308) were randomly divided into five treatments with five replicate pens (15 birds each) per treatment. The birds were fed either a basal diet with no supplement (control), with 75 (OLE75), 150 (OLE150), 300 (OLE300), and 600 (OLE600) mg kg−1 oleuropein, provided by 0.66, 1.33, 2.65, and 5.32 g kg−1 of the OLE. The dietary supplementation of OLE...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antimicrobial; Feed additive; Oleuropein; Olive leaves; Plant extract; Poultry.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982020000100600

Nutrient digestion, microbial protein synthesis, and blood metabolites of Jersey heifers fed chitosan and whole raw soybeans
Provedor de dados: 96
Autores: Gandra,Jefferson Rodrigues; Takiya,Caio Seiti; Oliveira,Euclides Reuter de; Paiva,Pablo Gomes de; Goes,Rafael Henrique de Tonissi e Buschinelli de; Gandra,Érika Rosendo de Sena; Araki,Hayne Mayumi Cariolano.
ABSTRACT This study was undertaken to determine the effects of chitosan and whole raw soybean on nutrient intake and total tract digestion, nitrogen utilization, microbial protein synthesis, blood metabolites, and energy balance of dairy heifers. Twelve Jersey heifers (6±0.5 months of age and 139.50±25.56 kg of live weight; mean ± standard deviation) were randomly assigned to a replicated Latin square design with a 2 × 2 factorial arrangement. The experimental period consisted of 14 days of adaptation to diets, six days of sampling, and five days of washout. The experimental diets were: control (CO); chitosan (CHI, inclusion of 2.0 g kg−1 DM of chitosan); whole raw soybean (WS, 163.0 g kg−1 of WS on diet DM basis); and chitosan + whole raw soybean...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antimicrobial; Nitrogen metabolism; Oilseed; Rumen modulator.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982016000300130

Evaluation of the use of probiotic (Bacillus subtilis C-3102) as additive to improve performance in broiler chicken diets
Provedor de dados: 96
Autores: Nunes,Jaqueline Oliveira; Bertechini,Antonio Gilberto; Brito,Jerônimo Ávito Gonçalves de; Fassani,Édison José; Mesquita,Fabrício Rivelli; Makiyama,Letícia; Meneghetti,Camila.
The objective of this experiment was to evaluate the use of probiotic based upon Bacillus subtilis C-3102 (BS) in broiler diets containing or not conventional additive growth-promoter (AGP). A total of 1,824 one-day-old chicks of the Cobb-500 strain were used and distributed into 48 plots (1.50 × 2.00 m). A completely randomized design with four treatments and 12 repetitions was adopted. The treatments evaluated were: 1- Negative Control - AGP-free diet (NC); 2 - Positive Control, with AGP halquinol 30 mg/kg diet (PC); 3 - NC + BS (3x10(5) cfu/g diet); and 4 - PC + BS (3x10(5) cfu/g diet). The diets were on corn, soybean meal and meat and bone meal basis, formulated according to the nutrient allowances of the Strain Cobb Guide, following a feed program...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antimicrobial; Meat poultry production; Microbiota; Nutrition.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012001100012

Actividad antimicrobiana e irritabilidad vaginal y dérmica de extractos acuosos de hojas secas de Solanum americanum Mill.
Provedor de dados: 98
Autores: Martínez Guerra,María Julia; López Barreiro,Marisol; Morejón Rodríguez,Zulema; Boucourt Rodríguez,Elisa; García Hernández,Ana Ibis.
INTRODUCCIÓN: Solanum americanum Mill. (yerba mora) es usada de forma tradicional para el tratamiento de las úlceras en la piel, se utiliza además como antiinflamatorio y antiséptico en enfermedades de la piel y en cérvico-vaginitis. Sin embargo, existen pocos estudios preclínicos que validen su uso. OBJETIVO: evaluar la actividad antimicrobiana, la irritabilidad vaginal y dérmica de 2 decocciones de hojas secas de Solanum americanum Mill. MÉTODOS: se prepararon 2 extractos acuosos de: a) hojas secas al 20 % y se evaluó la actividad antimicrobiana mediante el método de difusión en agar, frente a los microorganismos Candida albicans, Escherichia coli, Klebsiella pneumoniae y Salmonella thyphymurium; así como la irritabilidad en vagina de coneja por el...
Tipo: Journal article
Palavras-chave: Solanum americanum; Antimicrobiana; Irritabilidad dérmica; Irritabilidad vaginal; Solanum americanum; Antimicrobial; Skin irritability; Vaginal irritability.
Ano: 2009
URL: http://scielo.sld.cu/scielo.php?script=sci_arttext&pid=S1028-47962009000100003