Agerholm J S, Basse A, Krogh H V, Christensen K, Rønsholt L
Department of Pathology and Epidemiology, National Veterinary Laboratory, Copenhagen, Denmark.
Acta Vet Scand. 1993;34(4):371-7. doi: 10.1186/BF03548180.
The aetiology of abortions and calf mortality in 65 Danish cattle herds consisting of both dairy and beef breeds during a 1-year period is described. All observed aborted foetuses, still-born calves, and calves dying before 6 months of age were necropsied, and relevant microbiological examinations were performed. A total of 240 calves and 66 abortions were submitted corresponding to a calf mortality rate of 7%. The abortion frequency could not be calculated. 43% of the calves died at day 0, while 22% were aborted, 15% died during the first week of life, 9% died from 1 to 4 weeks of age, and 11% died at the age of 1 to 6 months. The most common cause was neonatal pulmonic atelectasis (stillbirth) followed by foetal infections, pneumonia, and septicaemia.
描述了在1年时间里，丹麦65个奶牛和肉牛混合牛群中流产及犊牛死亡率的病因。对所有观察到的流产胎儿、死产犊牛以及6月龄前死亡的犊牛进行了尸检，并进行了相关微生物学检查。总共提交了240头犊牛和66例流产病例，犊牛死亡率为7%。流产频率无法计算。43%的犊牛在出生当天死亡，22%为流产，15%在出生第一周内死亡，9%在1至4周龄时死亡，11%在1至6月龄时死亡。最常见的原因是新生儿肺不张（死产），其次是胎儿感染、肺炎和败血症。
