Ranch-management factors associated with antibody seropositivity for Neospora caninum in consignments of beef calves in Texas, USA.
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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>1cow/calfunit/2.2ha, using a round-bale feeder, allowing wildlife access to the weaning supplement, and self-reared 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.
author list (cited authors)
Barling, K. S., McNeill, J. W., Paschal, J. C., McCollum, F. T., Craig, T. M., Adams, L. G., & Thompson, J. A.
complete list of authors
Barling, KS||McNeill, JW||Paschal, JC||McCollum, FT||Craig, TM||Adams, LG||Thompson, JA