4.6 Article

Correlation of Shiga Toxin Gene Frequency with Commonly Used Microbial Indicators of Recreational Water Quality

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APPLIED AND ENVIRONMENTAL MICROBIOLOGY
卷 75, 期 2, 页码 316-321

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AMER SOC MICROBIOLOGY
DOI: 10.1128/AEM.01205-08

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  1. Pennsylvania Water Resources Research Center
  2. Coastal Zone Management
  3. Department of Environmental Protection
  4. EPA
  5. Mercyhurst College
  6. Erie County Department of Health
  7. Regional Science Consortium
  8. Pennsylvania Sea Grant

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Shiga toxin (Stx) genes produce proteins that are pathogenic to humans, leading to severe gastrointestinal illness. This work focuses on examining the abundance and distribution of stx genes in relation to common microbial indicators in beach water and streams in the vicinity of Presque Isle State Park in Erie, PA. By use of quantitative PCR, the relative abundance levels of stx DNA in over 700 samples in the sampling area were determined. The results demonstrate that the abundance and distribution of stx genes are variable and do not correlate with the abundance of Escherichia coli bacteria, enterococci, or viral particles. These results suggest that microbial indicators of water quality are not adequate in predicting the occurrence of organisms that harbor stx genes and highlight the need for standardized pathogen-specific detection protocols for waters utilized for recreational swimming.

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