Prevention of Experimentally Induced Enteric Colibacillosis in Newborn Calves
نویسندگان
چکیده
منابع مشابه
Prevention of experimentally induced enteric colibacillosis in newborn calves.
Severe enteric colibacillosis, characterized by profuse watery diarrhea, dehydration, apathy, hypothermia, and inability to stand, was produced in seven of eight newborn, colostrum-fed calves from nonvaccinated dams after oral challenge of calves with 10(11) viable cells of Escherichia coli strain B44. Twenty-nine of 32 calves from dams vaccinated with various preparations of E. coli strain B44...
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Colibacillosis is considered as one of the most important problems faced in livestock production, causing great economic losses. Calves become exposed to pathogenic E. coli in the environment when other infected or carrier calves and cows shed the bacteria in the feces. Diagnosing of E. coli infection in calves depends on an accurate history, clinical signs, culture of internal organs for bacte...
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Pregnant cows and heifers were vaccinated with a crude K99 extract prepared from an Escherichia coli K-12, K99 strain. A similar group, injected with an extract prepared from the K-12 parent strain, served as a control. Eleven calves were born to both groups and challenged orally with a mean of 1.6 x 10(11) bacteria of enterotoxic E. coli B41 (O101:K99+, ST+) at the time of first colostrum upta...
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ژورنال
عنوان ژورنال: Infection and Immunity
سال: 1973
ISSN: 0019-9567,1098-5522
DOI: 10.1128/iai.8.4.540-543.1973