Surface water of a perennial river exhibits multi-antimicrobial resistant shiga toxin and enterotoxin producing Escherichia coli

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• 作者：Siya Ram ; Poornima Vajpayee ; Ram Lakhan Singh ; Rishi Shanker
• 关键词：ETEC ; STEC ; Multi-antimicrobials resistant ; Surface water ; Virulence determinants
• 刊名：Ecotoxicology and Environmental Safety
• 出版年：2009
• 出版时间：February 2009
• 年：2009
• 卷：72
• 期：2
• 页码：490-495
• 全文大小：344 K

文摘

The high incidences of waterborne diseases are frequently associated with shiga toxin (STEC) and enterotoxin producing Escherichia coli (ETEC). Therefore, in the present study, surface water samples collected from the river Saryu were analyzed for the presence of multi-antimicrobial resistant ETEC and STEC. Forty-two E. coli isolates were screened for virulence determinants of STEC and ETEC. Eighteen E. coli isolates exhibit both stx1 and stx2 genes (66.6 % ) or only stx1 (33.3 % ) gene. eaeA, hlyA, and chuA genes were present in 94.5 % , 83.3 % , and 55.6 % of STEC, respectively. Further, it was observed that 12 isolates exhibit only ST1 gene (25 % ) or both LT1 and ST1 genes (75 % ). The resistance to multi-antimicrobials was observed in 100 % and 27.7 % of ETEC and STEC isolates, respectively. The presence of multi-antimicrobial resistant diarrheagenic E. coli in surface waters of south Asia is an important health concern due to risk of developing waterborne outbreaks.