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Journal Articles Epidemiology and Infection Year : 2022

Risk factors of Shiga toxin-producing Escherichia coli in livestock raised on diversified small-scale farms in California

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Abstract

The increasing number of diversified small-scale farms (DSSF) that raise outdoor-based livestock in the USA reflects growing consumer demand for sustainably produced food. Diversified farms are small scale and raise a combination of multiple livestock species and numerous produce varieties. This 2015–2016 cross-sectional study aimed to describe the unique characteristics of DSSF in California, estimate the prevalence of Shiga toxin-producing Escherichia coli (STEC) in livestock and evaluate the association between risk factors and the presence of STEC in livestock, using generalised linear mixed models. STEC prevalence was 13.62% (76/558). Significant variables in the mixed-effect logistic regression model included daily maximum temperature (OR 0.95; CI 95% 0.91–0.98), livestock sample source (cattle (OR 4.61; CI 95% 1.64–12.96) and sheep (OR 5.29; CI 95% 1.80–15.51)), multiple species sharing the same barn (OR 6.23; CI 95% 1.84–21.15) and livestock having contact with wild areas (OR 3.63; CI 95% 1.37–9.62). Identification of STEC serogroups of public health concern (e.g. O157:H7, O26, O103) in this study indicated the need for mitigation strategies to ensure food safety by evaluating risk factors and management practices that contribute to the spread and prevalence of foodborne pathogens in a pre-harvest environment on DSSF.

Dates and versions

hal-03832482 , version 1 (27-10-2022)

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Laura Patterson, Nora Navarro-Gonzalez, Michele Jay-Russell, Peiman Aminabadi, Alda Pires. Risk factors of Shiga toxin-producing Escherichia coli in livestock raised on diversified small-scale farms in California. Epidemiology and Infection, 2022, 150, pp.e125. ⟨10.1017/S0950268822001005⟩. ⟨hal-03832482⟩
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