Age-related decline in carriage of ampicillin-resistant Escherichia coli in young calves |
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| Authors: | Hoyle Deborah V Shaw Darren J Knight Hazel I Davison Helen C Pearce Michael C Low J Chris Gunn George J Woolhouse Mark E J |
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| Institution: | Centre for Tropical Veterinary Medicine, Roayl (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush Veterinary Centre, Roslin, Midlothian, United Kingdom. Deborah.Hoyle@ed.ac.uk |
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| Abstract: | The presence of ampicillin-resistant Escherichia coli (Amp(r) E. coli) in the fecal flora of calves was monitored on a monthly basis in seven cohorts of calves. Calves were rapidly colonized by Amp(r) E. coli, with peak prevalence in cohort calves observed in the 4 months after the calves were born. The prevalence of calves yielding Amp(r) E. coli in cohorts consistently declined to low levels with increasing age of the calves (P < 0.001). |
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