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Survival of Escherichia coli O157:H7 in Soils from Jiangsu Province, China

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  • Taoxiang Zhang
  • Haizhen Wang
  • Laosheng Wu
  • Jun Lou
  • Jianjun Wu
  • Philip C Brookes
  • Jianming Xu

Abstract

Escherichia coli O157:H7 (E. coli O157:H7) is recognized as a hazardous microorganism in the environment and for public health. The E. coli O157:H7 survival dynamics were investigated in 12 representative soils from Jiangsu Province, where the largest E. coli O157:H7 infection in China occurred. It was observed that E. coli O157:H7 declined rapidly in acidic soils (pH, 4.57 – 5.14) but slowly in neutral soils (pH, 6.51 – 7.39). The survival dynamics were well described by the Weibull model, with the calculated td value (survival time of the culturable E. coli O157:H7 needed to reach the detection limit of 100 CFU g−1) from 4.57 days in an acidic soil (pH, 4.57) to 34.34 days in a neutral soil (pH, 6.77). Stepwise multiple regression analysis indicated that soil pH and soil organic carbon favored E. coli O157:H7 survival, while a high initial ratio of Gram-negative bacteria phospholipid fatty acids (PLFAs) to Gram-positive bacteria PLFAs, and high content of exchangeable potassium inhibited E. coli O157:H7 survival. Principal component analysis clearly showed that the survival profiles in soils with high pH were different from those with low pH.

Suggested Citation

  • Taoxiang Zhang & Haizhen Wang & Laosheng Wu & Jun Lou & Jianjun Wu & Philip C Brookes & Jianming Xu, 2013. "Survival of Escherichia coli O157:H7 in Soils from Jiangsu Province, China," PLOS ONE, Public Library of Science, vol. 8(12), pages 1-6, December.
    • Handle: RePEc:plo:pone00:0081178
    DOI: 10.1371/journal.pone.0081178
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    Cited by:

    1. Hao Pang & Amir Mokhtari & Yuhuan Chen & David Oryang & David T. Ingram & Manan Sharma & Patricia D. Millner & Jane M. Van Doren, 2020. "A Predictive Model for Survival of Escherichia coli O157:H7 and Generic E. coli in Soil Amended with Untreated Animal Manure," Risk Analysis, John Wiley & Sons, vol. 40(7), pages 1367-1382, July.
    2. S Naganandhini & Z John Kennedy & M Uyttendaele & D Balachandar, 2015. "Persistence of Pathogenic and Non-Pathogenic Escherichia coli Strains in Various Tropical Agricultural Soils of India," PLOS ONE, Public Library of Science, vol. 10(6), pages 1-19, June.

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