Quantification of Persistence of Escherichia coli O157:H7 in Contrasting Soils
Figure 1
Survival of E. coli O157:H7 in autoclaved and unautoclaved (a) sand and (b) clay soils after 60 days incubation in a growth chamber at C. E. coli O157: H7 was enumerated on TSA-ampicilin plates from soil with different concentrations of pathogen. Each point represents the average of triplicate sampling, and the bars at each point indicate survival coefficient obtained at each sampling point. All were log transformed as reported in the text. Double Weibull model parameters of E. coli O157:H7 in autoclave and nonautoclave sandy and clay soils (c, d)
