What question did this study set out to answer?

To determine the prevalence and exposure rates of Escherichia coli O157:H7 in beef calves at weaning, prior to transport to feedlots or commingling with other cattle.

October 1, 1999Epidemiology and InfectionOpen Access

Prevalence of Escherichia coli O157:H7 in range beef calves at weaning

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Authors

WLWilliam W. LaegreidUniversity of Wyoming RERobert O. ElderSouthern Plains Agricultural Research Center JKJames E. KeenUniversity of Nebraska–Lincoln

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Implication

Cross-sectional study finds widespread Escherichia coli O157:H7 shedding and seroprevalence in range beef calves at weaning, indicating extensive exposure before feedlot entry.

Key Points

To determine the prevalence and exposure rates of Escherichia coli O157:H7 in beef calves at weaning, prior to transport to feedlots or commingling with other cattle.
Sampled 15 range cow-calf herds across Kansas, Missouri, Montana, Nebraska, and South Dakota during weaning in October and November.
Cultured fecal samples to detect live E. coli O157:H7 shedding and performed blocking ELISA tests to measure anti-O157 serum antibody titers.
Fecal culture detected E. coli O157:H7 in 13 of 15 herds (87%), with individual animal shedding within positive herds ranging from 1.7% to 20.0% (mean 7.4 ± 6.2%).
Serologic analysis revealed that 100% of herds were positive for anti-O157 antibodies, with within-herd seropositivity ranging from 63% to 100% and reaching 83% across all evaluated calves.

Cite This Study

Laegreid et al. (1999) studied this question.

synapsesocial.com/papers/6a956a32750ff06d6a768a8f https://doi.org/10.1017/s0950268899002757

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Implication

Cross-sectional study finds widespread Escherichia coli O157:H7 shedding and seroprevalence in range beef calves at weaning, indicating extensive exposure before feedlot entry.

Prevalence of Escherichia coli O157:H7 in range beef calves at weaning

Discussion

Member takes

Implication

Key Points

Cite This Study

Prevalence of Escherichia coli O157:H7 in range beef calves at weaning

Discussion

Member takes

Implication

Key Points

Cite This Study

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