Occurrence of antibiotic resistance in Escherichia coli from surface waters and fecal pollution sources near Hamilton, Ontario
Occurrence of antibiotic resistance in Escherichia coli from surface waters and fecal pollution sources near Hamilton, Ontario
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DOI：
10.1139/w05-028
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发表时间：
2005-06-01
影响因子：
2.8
通讯作者：
Hill, S
中科院分区：
文献类型：
--
作者：
Edge, TA;Hill, S
对从安大略省汉密尔顿周围的地表水和粪便污染源中分离出来的 462 株大肠杆菌进行了抗生素耐药性检查。大肠杆菌对所研究的 14 种抗生素中的每一种都具有最高浓度的耐药性，尽管高耐药性的发生率大多较低。从 CSO 水箱污水中分离出的 12 株大肠杆菌中，有 2 株对氨苄西林、环丙沙星、庆大霉素和四环素具有多重耐药性，超过其临床断点。与来自城市废水源的大肠杆菌相比，来自鸟粪的大肠杆菌的抗生素耐药性不那么普遍。根据抗生素耐药性数据计算的判别函数，区分大肠杆菌与鸟类和废水粪便污染源的平均分类正确率为 68%。初步的微生物源追踪结果表明，有时，与城市废水源相比，鸟粪可能是海湾公园海滩水域大肠杆菌的更重要贡献者。
Antibiotic resistance was examined in 462 Escherichia coli isolates from surface waters and fecal pollution sources around Hamilton, Ontario. Escherichia coli were resistant to the highest concentrations of each of the 14 antibiotics studied, although the prevalence of high resistance was mostly low. Two of 12 E. coli isolates from sewage in a CSO tank had multiple resistance to ampicillin, ciprofloxacin, gentamicin, and tetracycline above their clinical breakpoints. Antibiotic resistance was less prevalent in E. coli from bird feces than from municipal wastewater sources. A discriminant function calculated from antibiotic resistance data provided an average rate of correct classification of 68% for discriminating E. coli from bird and wastewater fecal pollution sources. The preliminary microbial source tracking results suggest that, at times, bird feces might be a more prominent contributor of E. coli to Bayfront Park beach waters than municipal wastewater sources.