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| Megchún García, Juan Valente. |
| La contaminación del agua es un fenómeno de interés mundial, originado, entre otras causas, por actividades antrópicas. Las bacterias coliformes deterioran la calidad del agua y afectan la salud pública. La contaminación del agua superficial y subterránea por coliformes totales y Escherichia coli se origina, en general, por fuentes puntuales derivadas de asentamientos humanos, como los ubicados en el Módulo de Riego I-1 La Antigua, Ver. Por tanto, el objetivo de este estudio fue valorar el nivel de contaminación del agua subterránea y superficial por coliformes totales y la presencia de Escherichia coli, e identificar las fuentes puntuales de contaminación en el agroecosistema con caña de azúcar del Módulo de Riego I-1 La Antigua. Se hicieron recorridos de... |
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Palavras-chave: Contaminación microbiológica del agua; Saccharum officinarum; Bacterias entéricas; Aquatic microbiological contamination; Enteric bacteria; Agroecosistemas Tropicales; Maestría. |
| Ano: 2013 |
URL: http://hdl.handle.net/10521/2340 |
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| Alam,Mohammad Zubair; Aqil,Farrukh; Ahmad,Iqbal; Ahmad,Shamim. |
| This study reports the occurrence of antibiotic resistance and production of β-lactamases including extended spectrum beta-lactamases (ESβL) in enteric bacteria isolated from hospital wastewater. Among sixty-nine isolates, tested for antibiotic sensitivity, 73.9% strains were resistant to ampicillin followed by nalidixic acid (72.5%), penicillin (63.8%), co-trimoxazole (55.1%), norfloxacin (53.6%), methicillin (52.7%), cefuroxime (39.1%), cefotaxime (23.2%) and cefixime (20.3%). Resistance to streptomycin, chloramphenicol, nitrofurantoin, tetracycline, and doxycycline was recorded in less than 13% of the strains. The minimum inhibitory concentration (MIC) showed a high level of resistance (800-1600 µg/mL) to one or more antibiotics. Sixty three (91%)... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Beta-lactamase; ESβL; Antibiotic resistance; Enteric bacteria; Plasmid transfer. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822013000300021 |
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| Troussellier, Marc; Bonnefont, Jean-luc; Courties, Claude; Derrien, Annick; Dupray, Elizabeth; Gauthier, Michel; Gourmelon, Michele; Joux, Fabien; Lebaron, Philippe; Martin, Yvan; Pommepuy, Monique. |
| The effects of different environmental factors (nutrient deprivation, hyperosmotic shock, exposure to light) on enteric bacteria which have been transferred into the marine environment, have been studied experimentally (microcosms) by considering demographic, physiological and genetic responses in Escherichia coli or Salmonella typhimurium populations. Short-term experiments (less than or equal to 48 h) showed that nutrient deprivation induced limited changes in measured bacteriological variables, but when combined with hyperosmotic shock, it results in an energy charge decrease and inactivation of membrane transport. Light exposure mainly affects the colony-forming capacity of bacterial populations. Combining different stress factors confirmed the rapid... |
| Tipo: Text |
Palavras-chave: Genetics; Cellular states; Physiology; Seawater; Enteric bacteria; Génétique; Etats cellulaires; Physiologie; Eau de mer; Entérobactéries. |
| Ano: 1998 |
URL: http://archimer.ifremer.fr/doc/1998/publication-845.pdf |
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