日粮应激对犊牛粪便中大肠杆菌O157:H7排出的影响。
Effect of dietary stress on fecal shedding of Escherichia coli O157:H7 in calves.
作者信息
Cray W C, Casey T A, Bosworth B T, Rasmussen M A
机构信息
National Animal Disease Center, Agricultural Research Service, U.S. Department of Agriculture, Ames, Iowa 50010, USA.
出版信息
Appl Environ Microbiol. 1998 May;64(5):1975-9. doi: 10.1128/AEM.64.5.1975-1979.1998.
Abstract
Two groups of calves were subjected to dietary stress by withholding of food beginning 1 or 14 days after inoculation with 10(10) CFU of Escherichia coli O157:H7. Following treatment, neither group had a significant increase in fecal shedding of E. coli O157:H7. A third group of calves had food withheld for 48 h prior to inoculation with 10(7) CFU of E. coli O157:H7. These calves were more susceptible to infection and shed significantly more E. coli O157:H7 organisms than calves maintained on a normal diet.
摘要
两组犊牛在接种10(10)CFU大肠杆菌O157:H7后1天或14天开始禁食，从而遭受饮食应激。处理后，两组犊牛的大肠杆菌O157:H7粪便排出量均未显著增加。第三组犊牛在接种10(7)CFU大肠杆菌O157:H7之前禁食48小时。与正常饮食的犊牛相比，这些犊牛更容易感染，且排出的大肠杆菌O157:H7菌显著更多。
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