Antibiotic contamination and occurrence of antibiotic-resistant bacteria in aquatic environments of northern Vietnam

The ubiquitous application and release of antibiotics to the environment can result in bacterial antibiotic resistance, which in turn can be a serious risk to humans and other animals. Southeast Asian countries commonly apply an integrated recycling farm system called VAC (Vegetable, Aquaculture and...

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Vydáno v:	The Science of the total environment Ročník 409; číslo 15; s. 2894 - 2901
Hlavní autoři:	Hoa, Phan Thi Phuong, Managaki, Satoshi, Nakada, Norihide, Takada, Hideshige, Shimizu, Akiko, Anh, Duong Hong, Viet, Pham Hung, Suzuki, Satoru
Médium:	Journal Article
Jazyk:	angličtina
Vydáno:	Kidlington Elsevier B.V 01.07.2011 Elsevier
Témata:	Acinetobacter Aeromonas analysis Animal farm Animal, plant and microbial ecology Anti-Bacterial Agents Anti-Bacterial Agents - analysis antibiotic resistance Antibiotics Applied ecology Aquaculture aquatic environment Bacteria Bacteria - genetics Bacteria - growth & development Bacteria - isolation & purification Biological and medical sciences Canals Contamination Drug Resistance, Bacterial Drug Resistance, Bacterial - genetics dry season Ecotoxicology, biological effects of pollution Environmental Monitoring erythromycin Erythromycin - analysis farm ponds Farms Fresh water environment Fundamental and applied biological sciences. Psychology gene transfer Genes genetics growth & development humans integrated agricultural systems isolation & purification Microorganisms quantitative analysis rain Resistant bacteria risk Southeast Asians statistics & numerical data Sul Sulfamethazine Sulfamethazine - analysis sulfamethoxazole Sulfamethoxazole - analysis Sulfonamide swine vegetables Vietnam Water Microbiology Water Pollutants, Chemical Water Pollutants, Chemical - analysis Water Pollution, Chemical Water Pollution, Chemical - statistics & numerical data Asia Vietnam Resistant bacteria Acinetobacter Vietnam Sulfonamide Sul Animal farm Drug Farming animal Neisseriaceae Contamination Antibiotic Sensitivity resistance Micrococcales Bacteria Organic compounds
ISSN:	0048-9697, 1879-1026, 1879-1026
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Shrnutí:	The ubiquitous application and release of antibiotics to the environment can result in bacterial antibiotic resistance, which in turn can be a serious risk to humans and other animals. Southeast Asian countries commonly apply an integrated recycling farm system called VAC (Vegetable, Aquaculture and Caged animal). In the VAC environment, antibiotics are released from animal and human origins, which would cause antibiotic-resistant bacteria (ARB). This study evaluated occurrence of ARB in the VAC environment in northern Vietnam, with quantitative analysis of antibiotic pollution. We found that sulfonamides were commonly detected at all sites. In dry season, while sulfamethazine was a major contaminant in pig farm pond (475–6662 ng/l) and less common in city canal and aquaculture sites, sulfamethoxazole was a major one in city canal (612–4330 ng/l). Erythromycin (154–2246 ng/l) and clarithromycin (2.8–778 ng/ml) were the common macrolides in city canal, but very low concentrations in pig farm pond and aquaculture sites. High frequencies of sulfamethoxazole-resistant bacteria (2.14–94.44%) were found whereas the occurrence rates of erythromycin-resistant bacteria were lower (< 0.01–38.8%). A positive correlation was found between sulfamethoxazole concentration and occurrence of sulfamethoxazole-resistant bacteria in dry season. The sulfamethoxazole-resistant isolates were found to belong to 25 genera. Acinetobacter and Aeromonas were the major genera. Twenty three of 25 genera contained sul genes. This study showed specific contamination patterns in city and VAC environments and concluded that ARB occurred not only within contaminated sites but also those less contaminated. Various species can obtain resistance in VAC environment, which would be reservoir of drug resistance genes. Occurrence of ARB is suggested to relate with rainfall condition and horizontal gene transfer in diverse microbial community.
Bibliografie:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0048-9697 1879-1026 1879-1026
DOI:	10.1016/j.scitotenv.2011.04.030