|
|
|
| Registros recuperados: 342 | |
|
|
| ACEVEDO-GUTIÉRREZ,Leidy Yoana; PATERNINA,Luis Enrique; PÉREZ-PÉREZ,Juan Camilo; LONDOÑO,Andrés Felipe; LÓPEZ,Gustavo; RODAS,Juan David. |
| RESUMEN Las garrapatas son artrópodos de gran impacto sobre la economía pecuaria y la salud humana debido a las pérdidas generadas en la producción, y a su capacidad de transmitir microorganismos. Pese a la evidencia de circulación de una gran diversidad de garrapatas en Colombia, no se cuenta con compilaciones actualizadas de la variedad de especies presentes, por lo cual los autores presentan una revisión de literatura sobre las garrapatas de la familia Ixodidae reportadas en Colombia incluyendo su distribución geográfica, sus hospederos y los microorganismos reportados en aquellas especies registradas en este país. En la recopilación se evidenció la presencia en Colombia de diferentes especies de garrapatas de los géneros Amblyomma, Ixodes,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Artrópodos vectores; Artrópodos hematófagos; Bacteria; Distribución espacial; Infestación; Virus. |
| Ano: 2020 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2020000100126 |
| |
|
|
| PEREZ C,ALEXANDER; ROJAS S,JOHANNA; FUENTES C,JUSTO. |
| El objetivo del presente trabajo fue aislar diversidad de bacterias endófitas cultivables asociadas a raíces del pasto colosuana Bothriochloa pertusa (L) A. Camus en tres localidades del departamento de Sucre, Colombia. La diversidad de bacterias endófitas fue realizada mediante el aislamiento de colonias en medios de cultivos. La densidad poblacional fue estimada por conteo directo de colonias en placa y las características culturales de cada morfotipo fueron obtenidas mediante observación de cada colonia formada. Se determinó la correlación diversidad, densidad poblacional y localidades, utilizando ANOVA y análisis de componentes principales o de correspondencia simple, mediante el programa estadístico R, 2009 (4,5). Fueron muestreadas 20 fincas por... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bacteria; Endófitas; Raíz; Pasto. |
| Ano: 2010 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2010000200015 |
| |
|
|
| ACOSTA,EDINSON ANDRÉS; GÓMEZ,ELIANA; ROMERO TABAREZ,MAGALLY; CADAVID RESTREPO,GLORIA ESTER; MORENO HERRERA,CLAUDIA XIMENA. |
| El caracol Pala, Strombus gigas (Strombidae), es de gran importancia ecológica y socioeconómica en el área caribeña colombiana. Sin embargo, es una especie catalogada como "vulnerable" y existe muy poca información referente a las especies bacterianas asociadas al caracol que puedan ser importantes para el desarrollo, manejo productivo y de seguridad acuícola de estos gastrópodos. En este trabajo, nosotros empleamos un estudio microbiológico y molecular de la región intergénica entre los genes 16S y 23S rDNA, análisis del gen rDNA 16S y secuenciación, para analizar las bacterias asociadas al caracol Pala (S. gigas). La composición de bacterias cultivables asociadas fue evaluada por su capacidad para crecer en agar marino y en medios de cultivos selectivos.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Strombus gigas; Caracol pala; Bacteria; Región intergénica 16S-23S; RDNA 16S. |
| Ano: 2009 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2009000200007 |
| |
|
|
| Silva, Fernanda Gomes Bezerra da; Yamamoto, Sandra Mari; Silva, Eva Mônica Sarmento da; Queiroz, Mario Adriano Ávila; Gordiano, Layse Araújo; Formiga, Marcela Almeida. |
| This study evaluated the effects of different concentrations of 30% propolis ethanol extract (PEE) and sodium monensin on the intake of dry matter, nutrient digestibility and ruminal fermentation and hematological parameters in sheep. Six adult castrated male sheep fistulated in the rumen were assigned to a 6 x 6 Latin square design. The addition of PEE or sodium monensin to the diet did not change the digestibility coefficients of dry matter (79.4%), crude protein (77.0%), neutral detergent fiber (76.1%), acid detergent fiber (69.7%), hemicellulose (80.9%), and organic matter (79.4%). Sheep fed diets with inclusion of sodium monensin showed 11.3% reduction in dry matter intake (1.76 kg day-1) compared to those which received PEE (2.00 kg day-1). The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nutrition; Ionophores; Bacteria; Rumen; Sheep blood. |
| Ano: 2015 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/25725 |
| |
|
|
| Souza, Edison Antonio de; Universidade Estadual Paulista “Júlio de Mesquista Filho"; Inoue, Hemily Tiemi; Universidade Estadual Paulista “Júlio de Mesquista Filho"; Fernandes Júnior, Ary; Universidade Estadual Paulista “Júlio de Mesquista Filho"; Veiga, Nabor; Universidade Estadual Paulista “Júlio de Mesquista Filho"; Orsi, Ricardo de Oliveira; UNESP - Botucat - SP. |
| The antibacterial activity of propolis produced throughout the year by different methods of collection (‘intelligent’ collector of propolis - ICP; plastic screen - PC; conventional scraping - CS) on Staphylococcos aureus and Escherichia coli is investigated. Fifteen beehives (five per collector) of Africanized Apis mellifera were used. Monthly produced propolis, with the same collection technique, was mixed for the preparation of the extract. The ethanol extract of propolis (EEP) was prepared at the ratio of 30% (30 g of propolis, completing the volume for 100 mL with ethanol 70%). Two microorganisms, a positive bacterium Gram Staphylococcus aureus and a negative bacterium Gram Escherichia coli, through the methodology of diffusion in agar, were used for... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Apiculture; Biological properties; Quality; Bacteria. |
| Ano: 2014 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/21436 |
| |
|
|
| Canhas, Isabela Nascimento; Heneine, Luiz Guilherme Dias; Fraga, Thaís; Assis, Débora Cristina Sampaio de; Borges, Márcia Helena; Chartone-Souza, Edmar; Nascimento, Andréa Maria Amaral. |
| Toxins and venoms produced by living organisms have exhibited a variety of biological activities against microorganisms. In this study, we tested seven snake venoms from the family Viperidae for antibacterial activity and the activities of reversal of antibiotic resistance and inhibition of biofilm formation against 22 clinical isolates of Staphylococcus aureus. Bothrops moojeni venom exhibited anti staphylococcal activity with the lowest mean value of minimum inhibitory concentration (MIC). Moreover, reversal of antibiotic resistance was observed for combinations of B. moojeni venom (½ x MIC) and norfloxacin or ampicillin (both ½ x MIC) for 86.4% and 50% of the isolates, respectively. B. moojeni venom alone at ½ MIC inhibited 90% of biofilm formation,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bothrops moojeni; Bacteria; Antibiotic-resistance; NorA efflux pump; Biofilm.. |
| Ano: 2017 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/33826 |
| |
|
| |
|
|
| LIXA,CAROLINA; MUJO,AMANDA; ANOBOM,CRISTIANE D.; PINHEIRO,ANDERSON S.. |
| Bacteria are able to synchronize the population behavior in order to regulate gene expression through a cell-to-cell communication mechanism called quorum sensing. This phenomenon involves the production, detection and the response to extracellular signaling molecules named autoinducers, which directly or indirectly regulate gene expression in a cell density-dependent manner. Quorum sensing may control a wide range of biological processes in bacteria, such as bioluminescence, virulence factor production, biofilm formation and antibiotic resistance. The autoinducers are recognized by specific receptors that can either be membrane-bound histidine kinase receptors, which work by activating cognate cytoplasmic response regulators, or cytoplasmic receptors... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Autoinducer; Bacteria; Quorum sensing; Receptor; Structure. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000502189 |
| |
|
|
| KELECOM,ALPHONSE. |
| After 40 years of intensive research, chemistry of marine natural products has become a mature field. Since 1995, there are signals of decreased interest in the search of new metabolites from traditional sources such as macroalgae and octocorals, and the number of annual reports on marine sponges stabilized. On the contrary, metabolites from microorganisms is a rapidly growing field, due, at least in part, to the suspicion that a number of metabolites obtained from algae and invertebrates may be produced by associated microorganisms. Studies are concerned with bacteria and fungi, isolated from seawater, sediments, algae, fish and mainly from marine invertebrates such as sponges, mollusks, tunicates, coelenterates and crustaceans. Although it is still to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bacteria; Fungi; Alkaloids; Despsipeptides; Terpenoids; Acetogenins; Biological activities. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652002000100012 |
| |
|
|
| SOBRAL,LAUREANA V.; MELO,KELLY N.; SOUZA,CLECIANA M.; SILVA,SÍLVIO F.; SILVA,GILVANIA L.R.; SILVA,ANDRESSA L.F.; WANDERLEY,KATHARINE A.A.; OLIVEIRA,IDJANE S.; CRUZ,ROBERTA. |
| ABSTRACT To the fungal microbiota the UFPE and biotechnological potential enzymatic and antimicrobial production. Air conditioned environments were sampled using a passive sedimentation technique, the air I ratio and the presence of aflatoxigenic strains evaluated for ANVISA. Icelles were to determine the enzymatic activity of lipase, amylase and protease metabolic liquids to determine antimicrobial activity. Diversity was observed in all CAV environments, CFU/m3 ranged from 14 to 290 and I/E ratio from 0.1 to 1.5. The of the fungal genera were: Aspergillus (50%), Penicillium (21%), Talaromyces (14%), Curvularia and Paecilomyces (7% each). Aspergillus sydowii (Bainier & Sartory) Thom & Church presented enzymatic activity and the Talaromyces... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Air quality; Bacteria; Enzymes; Filamentous fungi; Refrigerated environments. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000502327 |
| |
|
| |
|
| |
|
| |
|
|
| Leopoldino,W.M.; Lana,R.P.; Borges,A.C.; Mantovani,H.C.; Teixeira,R.M.A.; Oliveira,J.S.; Jaremtchuk,A.R.; Eifert,E.C.; Martins,R.G.R.. |
| Ruminal fluid from steers fed on pasture was incubated with artificial media at pH 5.5 and 7.0 in two experiments. In the first, the effect of monensin level on resistance of ruminal bacteria to potassium depletion was evaluated; in the second, effects of the ionophores monensin and lasalocid on ammonia and protein production were quantified. In experiment 1, culture media affected potassium level. The monensin concentration needed to cause half maximal potassium depletion was 2.77µM at pH 5.5 but was 0.056µM at pH 7.0, showing that bacteria incubated at pH 5.5 were more tolerant to monensin than those incubated at pH 7.0. Both ionophores as well as increased acidity caused decreased ammonia production. Both ionophores inhibited ammonia production by 56%,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bacteria; Lasalocid; Monensin; PH; Rumen. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352005000600012 |
| |
|
|
| Moreira,M.A.S.; Moraes,C.A.. |
| One hundred and ninety-seven isolates of Gram-negative bacteria, comprising 10 genera, were isolated from poultry carcasses at a processing plant in order to investigate resistance to low levels of antibiotics. The samples were taken just after evisceration and before inspection. Most of the isolates were of Samonella and Escherichia. Other genera present were Enterobacter, Serratia, Klebsiella, Kluyvera, Erwinia, Citrobacter, Pseudomonas and Aeromonas. Distinct profiles of antibiotic resistance were detected. Resistance to more than two antibiotics predominated and spanned several classes of antibiotics. Salmonellae and escherichiae were mainly resistant to the aminoglycosides, followed by tetracycline, nitrofuran, sulpha, macrolide, chloramphenicol,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Poultry; Antibiotic; Multi-resistance; Bacteria; Growth promoter. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352002000100001 |
| |
|
|
| Prado,M.R.; Brito,E.H.S.; Girão,M.D.; Sidrim,J.J.C.; Rocha,M.F.G.. |
| A total of 22 clinical specimens were obtained from 19 dogs with corneal ulcer (16 unilateral and three bilateral) for isolation and antimicrobial susceptibility evaluation of the isolated bacteria. Bacterial growth was observed in 100% of the samples (n=22). Staphylococcus intermedius was the predominant species (35.5%), followed by Corynebacterium xerosis (19.3%). Gentamicin, ciprofloxacin, chloramphenicol and tobramycin had a high efficacy against all of the isolated bacteria. The results evidenced that 80.7% of the isolates were Gram positive cocci and Gram positive bacilli, and that those microorganisms were sensitive to gentamicin, ciprofloxacin, chloramphenicol and tobramycin. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dog; Corneal ulcer; Bacteria. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352006000600008 |
| |
|
|
| Aquino,S.; Lui,C.C.; Corrêa,B.. |
| ABSTRACT The quality of products derived from eggs depends on the quality of the raw material source and the industrial production. The contamination by fungi and bacteria can occur after exposure of the product in the retail market. The objective of this study was to evaluate the microbiological quality of 60 samples of derivated egg products and evaluate the effects of gamma radiation of cobalt-60, using the dose of 5 and 10 kGy, for decontamination of products collected in the retail market in the São Paulo city. The bacterial count was performed by the most probable number (MPN) and the fungal counts by serial dilution after plating surface. It was observed a decrease in the humidity and water activity (Aw) values of irradiated whole egg powder and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bacteria; Sterilization; Fungi; Irradiation; Powdered egg. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352017000601683 |
| |
|
| |
|
|
| Cóndor-Luján,Báslavi; Francia-Quiroz,Juan C.. |
| ABSTRACT In the last decades, sponges have emerged as the largest source of active compounds of animal origin for pharmaceutical purposes. In Peru information on these animals is incipient and scattered, which limits taking the right measures for their adequate management, exploitation, and conservation. The aim of this study is to provide an update on the scope and perspectives of sponge research in Peru, with an emphasis on species richness and their antibacterial potential. Likewise, research initiatives carried out in other South American Pacific countries are reviewed. Research efforts in Peru have allowed the description of 46 species; however, the sponge richness is underestimated. On the other hand, in other latitudes, active principles with... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antimicrobial activity; Bacteria; Biotechnology; Marine biodiversity; Porifera.. |
| Ano: 2022 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-97612022000200107 |
| |
|
|
| Suárez,Jorge A.; García,Alberto; Newmark,Federico; Bador,Regis. |
| Con el objeto de determinar los factores iniciales que pueden afectar la sobrevivencia de postlarvas de camarón durante el proceso de larvicultura, se muestrearon tres laboratorios ubicados en la costa Atlántica de Colombia, cubriendo 71 lotes de nauplios en un período de 10 meses durante 1996. Para cada lote de nauplios se hizo seguimiento de variables cualitativas (origen, modo de transporte, presencia de bacterias en el agua de transporte) y variables cuantitativas (tiempo y densidad de transporte, características de la calidad del agua, proporciones de cada estadío y deformidad de los nauplios). Las variables calidad del agua y densidad (nauplios/l) se evaluaron durante los procesos de empaque, transporte, recepción, aclimatación y siembra de los... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nauplio; Calidad; Bacteria; Transporte. |
| Ano: 2001 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-97612001000100001 |
| |
| Registros recuperados: 342 | |
|
|
|
