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Risk factors for fecal shedding of Escherichia coli O157:H7 in dairy calves.
USDA-APHIS Centers for Epidemiology and Animal Health, Fort Collins, CO 80521, USA.
A case-control study was conducted to determine risk factors for fecal shedding of Escherichia coli O157:H7 (ECO) in dairy calves. Three herds previously found to lack calves that shed ECO in their feces were selected for each herd previously found to have calves that shed ECO. Fecal samples from 965 calves on 64 farms were tested for ECO by microbial culture. Sample prevalence of ECO in calves less than 8 weeks old was 1.4% and in calves 8 weeks or older was 4.8%. Calves were 3 times more likely to shed ECO after weaning than before weaning. Shedding of ECO was associated with grouping calves before weaning; feeding whole cottonseed was negatively associated with ECO shedding. The change in results between testing periods illustrated that an individual herd's status cannot be defined by a single testing of a small sample of cattle.
PMID: 7601692 [PubMed - indexed for MEDLINE]
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Cited by 21 PubMed Central articles
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Cattle-level risk factors associated with fecal shedding of Shiga toxin-encoding bacteria on dairy farms, Minnesota, USA.
Cho S, Fossler CP, Diez-Gonzalez F, Wells SJ, Hedberg CW, Kaneene JB, Ruegg PL, Warnick LD, Bender JB.
Can J Vet Res. 2009 Apr; 73(2):151-6.
[Can J Vet Res. 2009]
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Risk factors for the presence of high-level shedders of Escherichia coli O157 on Scottish farms.
Chase-Topping ME, McKendrick IJ, Pearce MC, MacDonald P, Matthews L, Halliday J, Allison L, Fenlon D, Low JC, Gunn G, et al.
J Clin Microbiol. 2007 May; 45(5):1594-603. Epub 2007 Mar 14.
[J Clin Microbiol. 2007]
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Comparison of diversities of Escherichia coli O157 shed from a cohort of spring-born beef calves at pasture and in housing.
Vali L, Pearce MC, Wisely KA, Hamouda A, Knight HI, Smith AW, Amyes SG.
Appl Environ Microbiol. 2005 Mar; 71(3):1648-52.
[Appl Environ Microbiol. 2005]
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