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
Centre for Tropical Veterinary Medicine, Roayl (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush Veterinary Centre, Roslin, Midlothian, United Kingdom.
Appl Environ Microbiol. 2004 Nov;70(11):6927-30. doi: 10.1128/AEM.70.11.6927-6930.2004.
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).
对七个牛犊群组的粪便菌群每月监测一次,以了解其中耐氨苄青霉素大肠杆菌(Amp(r) E. coli)的存在情况。牛犊迅速被Amp(r) E. coli定植,在出生后4个月的群组牛犊中观察到患病率达到峰值。随着牛犊年龄的增长,各群组中产生Amp(r) E. coli的牛犊患病率持续下降至低水平(P < 0.001)。