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Registros recuperados: 84 | |
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TAVARES,Emanuele N; ANDRADE,Jacqueline C; De M. OLIVEIRA,Cícera Datiane; TINTINO,Saulo R; LIMA,Micheline A; COUTINHO,Henrique D.M. |
Nowadays, it is widely known that resistant pathogenic strains are becoming one of the greatest health problems related to human sciences. It is also known that fatty acids can present antimicrobial activity. The corn and soy oils are rich in fatty acids. In this regard, this work aimed to evaluate antibacterial and modulatory activity of these two industrial fixed oils. Both tests were performed using the microdilution method to Minimum inhibitory concentration under 1024 mg/ml. The aminoglycosides activity was enhanced by combining corn oil using E. coli 27. One of the mechanisms that might explain the synergism toward the corn oil, in part, might be due to the hidrophobic nature of the saturated and unsaturated lipids present in the sample. The results... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antibacterial activity; Corn oil; Modulation; Soy oil. |
Ano: 2015 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2015000100003 |
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Sousa, Erlânio Oliveira de; Rodrigues, Fabíola Fernandez Galvão; Campos, Adriana Rolim; Costa, José Galberto Martins da. |
Several plants have been evaluated not only for alone antimicrobial activity, but as resistance-modifying agent. This work is the first on the modulation of antibiotic activity by Lantana camara L. extracts against multiresistant strains of Escherichia coli and Staphylococcus aureus. The antibacterial activities of leaf and root ethanol extracts alone or in association with aminoglycosides were determined against bacterial strains by a microdilution test. The minimum inhibitory concentration (MIC) of the extracts was compared with of the aminoglycosides. Phytochemical prospection revealed the presence of quinones, steroids, flavonoids, saponins, tannins, triterpenoids and alkaloids. The results showed antibacterial activities of the extracts and... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lantana camara L.; Antibacterial activity; Aminoglycosides; Synergism. Microbiologia. |
Ano: 2015 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/22877 |
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Leandro,Luís F.; Mendes,Carlos A.; Casemiro,Luciana A.; Vinholis,Adriana H.C.; Cunha,Wilson R.; Almeida,Rosana de; Martins,Carlos H.G.. |
In this work, we used the Minimum Inhibitory Concentration (MIC) technique to evaluate the antibacterial potential of the apitoxin produced by Apis mellifera bees against the causative agents of tooth decay. Apitoxin was assayed in naturaand in the commercially available form. The antibacterial actions of the main components of this apitoxin, phospholipase A2, and melittin were also assessed, alone and in combination. The following bacteria were tested: Streptococcus salivarius, S. sobrinus, S. mutans, S. mitis, S. sanguinis, Lactobacillus casei, and Enterococcus faecalis. The MIC results obtained for the commercially available apitoxin and for the apitoxin in natura were close and lay between 20 and 40µg / mL, which indicated good antibacterial activity.... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antibacterial activity; Apitoxin; Melittin; Phospholipase A2; Tooth decay; Oral pathogens. |
Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000100147 |
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SUTILI,FERNANDO J.; CUNHA,MAURO A.; ZIECH,ROSANGELA E.; KREWER,CARINA C.; ZEPPENFELD,CARLA C.; HELDWEIN,CLARISSA G.; GRESSLER,LETICIA T.; HEINZMANN,BERTA M.; VARGAS,AGUEDA C.; BALDISSEROTTO,BERNARDO. |
In vitro and in vivo activity of the Lippia alba essential oil (EO) against Aeromonas sp. was evaluated. In the in vitro assay the minimum inhibitory concentration (MIC) and a minimum bactericidal concentration (MBC) of EO for Aeromonas cells were determined using the microdilution method. Twenty five strains of Aeromonassp. isolated from infected fish obtained from local fish farms were used. MIC and MBC values were 2862 and 5998 µg mL-1 for L. alba EO and 0.5 and 1.2 µg mL-1for gentamicin, respectively. In the in vivo assay silver catfish juveniles (Rhamdia quelen) (7.50 ± 1.85 g and 10.0 ± 1.0 cm) with typical injuries associated to Aeromonas infection were divided into four treatments (in triplicate n=10): untreated fish (negative control), 10 mg L-1... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antibacterial activity; Essential oils; Fish; Gentamicin. |
Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000100095 |
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Piana,Mariana; Brum,Thiele F. de; Boligon,Aline A.; Alves,Camilla F.S.; Freitas,Robson B. de; Nunes,Letícia T.; Mossmann,Natalia J.; Janovik,Vanessa; Jesus,Roberta S.; Vaucher,Rodrigo A.; Santos,Roberto C.V.; Athayde,Margareth L.. |
American foulbrood (AFB) is a serious worldwide spreading disease in bees caused by Paenibacillus larvae. Plants extracts are known to decrease or inhibit the growth of these bacteria. The purpose of this study was to evaluate the antimicrobial activity of Calendula. officinalis, Cariniana domestica, and Nasturtium officinale extracts against the P. larvae and to evaluate the toxicity of the extracts in bees. In vitro activity against P. larvae of the extracts was evaluated by micro dilution method and the minimal inhibitory concentrations (MICs) were also determined. The concentrations used in the toxicity test were established based on the MIC values and by the spraying application method. The P. larvae was susceptible to the evaluated crude extract of... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antibacterial activity; American foulbrood; Brazilian plants; Paenibacillus larvae. |
Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000201041 |
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CARNEIRO,NÁRGELLA S.; ALVES,CASSIA C.F.; ALVES,JOSÉ M.; EGEA,MARIANA B.; MARTINS,CARLOS H.G.; SILVA,THAYNÁ S.; BRETANHA,LIZANDRA C.; BALLESTE,MAIRA P.; MICKE,GUSTAVO A.; SILVEIRA,EDUARDO V.; MIRANDA,MAYKER L.D.. |
ABSTRACT Many essential oils (EOs) of different plant species possess interesting antimicrobial effects on buccal bacteria and antioxidant properties. Eugenia klotzschiana Berg (pêra-do-cerrado, in Portuguese) is a species of Myrtaceae with restricted distribution in the Cerrado. The essential oils were extracted through the hydrodistillation technique using a modified Clevenger apparatus (2 hours) and chemically characterized by GC-MS. The major compounds were α-copaene (10.6 %) found in oil from leaves in natura, β-bisabolene (17.4 %) in the essential oil from dry leaves and α-(E)-bergamotene (29.9 %) in oil from flowers. The antioxidant activity of essential oils showed similarities in both methods under analysis (DPPH and ABTS˙+) and the results... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antioxidant activity; Antibacterial activity; Brazilian pear; Drying; Eugenia klotzschiana; Sesquiterpenes. |
Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000401907 |
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MONTENEGRO,GLORIA; PORTALUPPI,MARIANA C; SALAS,FRANCISCO A; DÍAZ,MARÍA F. |
An ethanol extract prepared from the gametophyte Chilean native moss Sphagnum magellanicum was dried out, weighed and dissolved in distilled water. This extract was then assayed for its antibacterial activity against the G(-) bacteria Azotobacter vinelandii, Erwinia carotovora subsp. carotovora, Enterobacter aerogenes, Escherichia coli, Pseudomonas aeruginosa, Salmonella typhi, Vibrio cholerae, and the G(+) bacteria Staphylococcus aureus subsp. aureus, and Streptococcus type b. The growth of the cultures of E. carotovora subsp. carotovora, and V. cholerae was inhibited at a concentration of 581mg/ml of extract, while the cultures of E. coli, S. typhi and Streptococcus type b were inhibited at a concentration of 1.16 mg/mL of extract. The concentration of... |
Tipo: Journal article |
Palavras-chave: Sphagnum magellanicum; Phenolic compounds; Antibacterial activity; MIC. |
Ano: 2009 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602009000200012 |
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Sebei,Khaled; Sakouhi,Fawzi; Herchi,Wahid; Khouja,Mohamed Larbi; Boukhchina,Sadok. |
BACKGROUND: In this paper, we have studied the essential oils chemical composition of the leaves of seven Eucalyptus species developed in Tunisia. Eucalyptus leaves were picked from trees growing in different arboretums in Tunisia. Choucha and Mrifeg arboretums located in Sedjnene, region of Bizerte (Choucha: E. maideni, E. astrengens et E. cinerea; Mrifeg : E. leucoxylon), Korbous arboretums located in the region of Nabeul, North East Tunisia with sub-humid bioclimate, (E. lehmani), Souiniet-Ain Drahem arboretum located in region of Jendouba (E. sideroxylon, E. bicostata). Essential oils were individually tested against a large panel of microorganisms includingStaphylococcus aureus (ATCC 6539), Escherichia coli (ATCC 25922), Enterococcus faecalis... |
Tipo: Journal article |
Palavras-chave: Eucalyptus; Essential oil; Antibacterial activity; -pinene. |
Ano: 2015 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602015000100007 |
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Agripino,Débora Gomes; Lima,Marcos Enoque Leite; Silva,Marcelo Rogério da; Meda,Cristiane Infante; Bolzani,Vanderlan da Silva; Cordeiro,Inês; Young,Maria Claudia Marx; Moreno,Paulo Roberto H.. |
I. Atlantic Rain Forest . Ecological Station Juréia-Itatins) Crude extracts from 88 plant species occurring in São Paulo State (Brazil), collected in an Atlantic Forest region, have been screened for antimicrobial and DNA-damaging activities. Of the 114 extracts assayed for antibacterial activity, only the extracts from leaves and stems of Aspidosperma ramiflorum (Apocynaceae) showed a slight activity against Escherichia coli. In the antifungal assay with Candida albicans, no active extract was observed, while in the bioautography assay with Cladosporium sphaerospermum and C. cladosporioides 12% were active. However, only the extract of Psychotria mapoureoides (Rubiaceae) stems showed a strong inhibition of both fungi. The DNA-damaging assay with mutant... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Atlantic Rain forest; Antibacterial activity; Antifungal activity; Antitumoral activity; Plants screening. |
Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032004000200009 |
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Oliveira,Jana Luíza Toscano Mendes de; Diniz,Margareth de Fátima Melo; Lima,Edeltrudes de Oliveira; Souza,Evandro Leite de; Trajano,Vinícius Nogueira; Santos,Bernadete Helena Cavalcante. |
This study aimed to evaluate the antibacterial activity of Origanum vulgare L. and O. majorana L. essential oils on Staphylococcus aureus, S. coagulase negative, Enterobacter spp., Proteus spp., Acinetobacter spp., Klebsiella spp. isolated from the patients with conjunctivitis. The results showed a prominent inhibitory effect of both the essential oils on all the bacterial strains, noted by the large bacterial growth inhibition zones (15-32mm). The Minimum Inhibitory Concentrations (MIC) values were between 5-20µL/mL and 2.5-10 µL/mL for O. vulgare and O. majorana essential oil, respectively. The MIC were able to cause significant (P<0.05) inhibitory effect on the cell viability of Klebsiella spp., Proteus spp. and S. aureus providing a total... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Origanum vulgare L.; Origanum marjorana L.; Essential oil; Antibacterial activity; Conjunctivitis. |
Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000100006 |
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Kumar,Sanjeet; Das,Gitishree; Shin,Han-Seung; Kumar,Pradeep; Patra,Jayanta Kumar. |
ABSTRACT >The in vitro antimicrobial activity of Gymnopetulum chinense (Cucurbitaceae), a lesser known climber of Eastern Ghats and recently recorded species from Odisha, India was studied against five selected human pathogenic bacteria (Streptococcus mutans, S. pyogenes, Vibrio cholerae, Shigella flexneri and Salmonella typhi), by agar well diffusion (AWD), disc diffusion (DD) and broth dilution methods. Different solvent extracts were prepared from the leaves of G. chinense using various solvents viz. n-hexane, chloroform, methanol, acetone and aqueous. The nomenclature, detailed description and photographs of the plant are provided to facilitate its easy identification. The leaf extract showed presence of phenolic compounds, tannin, saponin,... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antibacterial activity; Gymnopetulum chinense; Cucurbits; Streptococcus pyogenes; Antimicrobial resistance. |
Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132017000100438 |
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Singariya,Premlata; Kumar,Padma; Mourya,Krishan Kumar. |
The present study was carried out to determine the possible bioactive components (steroids) of Cenchrus setigerus using GC-MS analysis and in vivo estimation of metabolites (total soluble sugar, soluble protein, proline and total phenolics), photosynthetic pigments (chlorophyll-a, chlorophyll-b and carotenoids) of seedlings and antimicrobial activity of extracts in various polar solvents from the leaves of C. setigerus. Antimicrobial activity was evaluated against three Gram-negative bacteria, including Proteusmirabilis, Klebsiella pneumonia and Agrobacterium tumefaciens andone fungus Aspergillus niger using 'disc diffusion' method, followed by the determination of minimum inhibitory concentrations (MIC) by broth dilution method. Results revealed the... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cenchrus grass; Photosynthetic pigments; Total soluble sugar; Proline; Antibacterial activity; MIC; MBC/MFC. |
Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132014000100010 |
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Registros recuperados: 84 | |
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