Culling associated with Neospora caninum infection in dairy cows

Mark Thurmond, Sharon K. Hietala

Research output: Contribution to journalArticlepeer-review

108 Scopus citations

Abstract

Objectives - To estimate the extent to which cows infected with Neospora caninum were culled, compared with noninfected cows, and to identify differences in reasons for culling between infected and noninfected cows. Animals - 442 Holstein cows on a commercial dairy with 36% seroprevalence for N caninum. Procedure - Culling of cows was done after first calving without knowledge of N caninum serologic status. Results - Risk of a seropositive cow dying was not different from that of a seronegative cow (P = 0.50). Seropositive cows were culled 6.3 months earlier than seronegative cows, and had a 1.6 times greater risk of being culled, compared with seronegative cows (P = 0.004), after adjusting for culling risk associated with abortion. For cows culled for low milk production, culling risk for a seropositive cow was twice that for a seronegative cow (P = 0.007). Conclusions - The economic impact of N caninum infection in dairy cattle can be expected to extend beyond that for abortion alone. Costs of the disease also may include premature culling and diminished milk production. Clinical Relevance - Plans to control N caninum infection on dairies should include consideration that benefits may include reduction in premature culling and increase in milk production.

Original languageEnglish (US)
Pages (from-to)1559-1562
Number of pages4
JournalAmerican Journal of Veterinary Research
Volume57
Issue number11
StatePublished - Dec 1 1996

ASJC Scopus subject areas

  • veterinary(all)

Fingerprint

Dive into the research topics of 'Culling associated with Neospora caninum infection in dairy cows'. Together they form a unique fingerprint.

Cite this