Arsenic tolerance in bacterial cultures isolated from metal contaminated soil
Several centuries of uninterrupted mining activities in Zacatecas, Mexico has caused soil pollution with toxic metals and metalloids such as arsenic. In this study, the arsenic-tolerance of ten bacterial isolates from a metal contaminated site were analyzed, and high tolerance was observed in both s...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2017 |
| País: | México |
| Institución: | Universidad Autónoma de Zacatecas |
| Repositorio: | Redalyc-UAZ |
| OAI Identifier: | oai:redalyc.org:41652062002 |
| Acceso en línea: | https://www.redalyc.org/articulo.oa?id=41652062002 |
| Access Level: | acceso abierto |
| Palabra clave: | Multidisciplinarias (Ciencias Sociales) bacillus micrococcus acinetobacter Arsenic tolerance antibiotic resistance |
| Sumario: | Several centuries of uninterrupted mining activities in Zacatecas, Mexico has caused soil pollution with toxic metals and metalloids such as arsenic. In this study, the arsenic-tolerance of ten bacterial isolates from a metal contaminated site were analyzed, and high tolerance was observed in both solid (40 mM – 300 mM of sodium dihydrogen arsenate and 4 mM – 25 mM of sodium arsenite) and liquid media (7.2 mM and 11.3 mM arsenite). The arsenic tolerant isolates were identified by biochemical and 16S rRNA-encoding gene amplification analysis as members of the Bacillus, Micrococcus, and Acinetobacter genus. A study of resistance to antibiotics revealed a high prevalence of resistance to beta-lactams and moderate prevalence to nitrofurantoin, vancomycin, and ceftriaxone, suggesting that the antibiotic multiresistance of the isolates is probably related to arsenic tolerance through a plasmid or chromosomally encoded resistance mechanism. |
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