| occurrence and antibiotic resistance of escherichia coli o157:h7 in a watershed in north-central indiana. | the wildcat creek in north-central indiana is an impaired stream with historically high fecal coliform counts. this study evaluated the presence of both fecal coliforms and escherichia coli o157:h7 at five sites in rural and urban areas in the eastern part of the wildcat creek watershed. escherichia coli o157:h7 was isolated by immunomagnetic separation. shiga-like toxin genes (stx1 and stx2) were detected in selected isolates by polymerase chain reaction (pcr) amplification. isolates of e. coli ... | 2009 | 19329688 |