Bovine brucellosis: an investigation of latency in progeny of culture-positive cows.
Bovine brucellosis: an investigation of latency in progeny of culture-positive cows.
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牛布鲁氏菌病：培养阳性奶牛后代潜伏期的调查。
DOI：
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发表时间：
1988
期刊：
影响因子：
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通讯作者：
AI Swann
中科院分区：
文献类型：
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作者：
W. Ray;R. Brown;D. Stringfellow;P. Schnurrenberger;C. M. Scanlan;AI Swann
感染牛种布氏杆菌田间菌株的母牛所产小牛（n = 150）在出生后24小时内断奶或允许哺乳直至断奶（断奶时年龄范围为10 - 43周龄）。断奶后，将雌性小牛分成小组放置在特殊围栏中，以防止进一步直接暴露于布鲁氏菌病。断奶时，将雄性小牛转移到隔离牧场，并作为一组饲养。随后，饲养第一代小母牛，并将其置于单独的隔离栏中，直至妊娠终止。2头第一代小母牛（培养阴性）出现了原因不明的持续性血清学应答（对牛种B）。未从感染母牛的后代（105头）或子代后代（95头胎儿和新生儿）中分离出布鲁氏菌，表明潜伏期可能不常见。
Calves (n = 150) born to cows infected with field strains of Brucella abortus were weaned within 24 hours after birth or allowed to nurse until weaned (age at weaning ranged from 10 to 43 weeks). After weaning, female calves were placed in small groups in special pens constructed to prevent further direct and environmental exposure to brucellae. At weaning, male calves were moved to an isolated pasture and were kept as a single group. Later, first-generation heifers were bred and placed in individual isolation pens until termination of pregnancy. Two of the first-generation heifers (that were culture-negative) developed persistent serologic responses (to B abortus) of unexplained origin. Brucellae were not isolated from progeny of infected cows (105) or from progeny offspring (95 fetuses and neonates), indicating that latency may be infrequent.