期刊
PREVENTIVE VETERINARY MEDICINE
卷 52, 期 1, 页码 53-61出版社
ELSEVIER
DOI: 10.1016/S0167-5877(01)00233-1
关键词
Neospora caninum; cattle; risk factors
A study was conducted with a 1998 retained-ownership population of Texas (USA) beef calves to determine the ranch-management practices associated with calf seroprevalence to Neospora caninum. Management practices of 76 Texas ranches that consigned 760 calves to a retained-ownership feedlot program were reviewed from a mailed questionnaire. Ninety-nine of 760 (13%; 95% CI, 9.4%, 17.7%) calves were positive to N. caninum and 59% of the ranches consigned at least one positive calf. In the logistic multiple-regression model which controlled for overdispersion, increased odds of calf-level seropositivity was associated with seasonal calving patterns, with stocking > 1 cow/calf unit/2.2 ha, using a round-bale feeder, allowing wildlife access to the weaning supplement, and self-rea-red replacement heifers. However, decreased odds of seropositivity was associated with using a cattle-working dog and with using a self-contained cattle feeder. There was substantial overdispersion. due to ranch. (C) 2001 Elsevier Science B.V. All rights reserved.
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