HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Mubiru, D. N. Articles by Grove, J. H. Search for Related Content PubMed Articles by Mubiru, D. N. Articles by Grove, J. H. Agricola Articles by Mubiru, D. N. Articles by Grove, J. H.

Mortality of Escherichia coli O157:H7 in Two Soils with Different Physical and Chemical Properties

Department of Agronomy, Univ. of Kentucky, Lexington, KY 405460091.

^* Corresponding author (mscoyn00{at}pop.uky.edu).

ABSTRACT

Wild and domesticated animals can harbor a pathogenic Escherichia coli strain designated as O157:H7. Potential health problems could occur if strain O157:H7 is a more robust survivor in defecated waste than commonly used indicator bacteria. A laboratory study was conducted to assess E. coli O157:H7 survival relative to a nonpathogenie E. coli strain in two soils with different physical and chemical characteristics. Bacteria in the inoculated soils were enumerated on a weekly basis for 8 wk using a most probable number (MPN) technique. First-order decay models were used to describe bacteria mortality in the soils. Decay series were described slightly better by a two-stage function than by a single-stage function. Strain O157:H7 exhibited similar mortality patterns to the nonpathogenic E. coli in the same soil environment. Both E. coli strains had greater mortality rates in Pope silt loam (coarse-loamy, mixed, active, mesic Fluventic Dystrudept) than Zanesville silt loam (fine-silty, mixed, active, mesic Oxyaquic Fragiudalf). Differences in available soil water probably were the overriding factor in E. coli survival. Escherichia coli O157:H7 survival could be modeled in the same way as nonpathogenic E. coli and appears to have a slightly higher mortality rate.

Contribution (Paper no. 00-06-33) of the Kentucky Agric. Exp. Stn., published with the approval of the director.

Received for publication February 17, 2000.

This article has been cited by other articles:

				P. Fine and A. Hass Role of Organic Matter in Microbial Transport during Irrigation with Sewage Effluent J. Environ. Qual., May 25, 2007; 36(4): 1050 - 1060. [Abstract] [Full Text] [PDF]

				R. A. Holley, K. M. Arrus, K. H. Ominski, M. Tenuta, and G. Blank Salmonella Survival in Manure-Treated Soils during Simulated Seasonal Temperature Exposure J. Environ. Qual., May 31, 2006; 35(4): 1170 - 1180. [Abstract] [Full Text] [PDF]

				A. Unc and M. J. Goss Culturable Escherichia coli in Soil Mixed with Two Types of Manure Soil Sci. Soc. Am. J., March 29, 2006; 70(3): 763 - 769. [Abstract] [Full Text] [PDF]

				R. Saini, L. J. Halverson, and J. C. Lorimor Rainfall Timing and Frequency Influence on Leaching of Escherichia coli RS2G through Soil Following Manure Application J. Environ. Qual., September 1, 2003; 32(5): 1865 - 1872. [Abstract] [Full Text] [PDF]

				J. M. Ritchie, G. R. Campbell, J. Shepherd, Y. Beaton, D. Jones, K. Killham, and R. R. E. Artz A Stable Bioluminescent Construct of Escherichia coli O157:H7 for Hazard Assessments of Long-Term Survival in the Environment Appl. Envir. Microbiol., June 1, 2003; 69(6): 3359 - 3367. [Abstract] [Full Text] [PDF]

				T. Y. Guan and R. A. Holley Pathogen Survival in Swine Manure Environments and Transmission of Human Enteric Illness--A Review J. Environ. Qual., March 1, 2003; 32(2): 383 - 392. [Abstract] [Full Text] [PDF]