Effect of Neospora caninum infection on milk production in first-lactation dairy cows

Mark Thurmond, Sharon K. Hietala

Research output: Contribution to journalArticle

106 Citations (Scopus)

Abstract

Objective - To determine whether cows seropositive to Neospora caninum produced less milk during their irst lactation than seronegative cows. Design - Repeated-measures, prospective study. Animals - 372 Holstein cows in their first lactation. Procedure - Cows were tested repeatedly before and during their first lactation for antibodies to N caninum. One-way and repeated-measures ANOVA were used to determine whether mean daily milk weights and milk weights from Dairy Herd Improvement Association testing were less for seropositive cows than for seronegative cows. Results - Weekly mean daily milk weights for the 118 seropositive cows were significantly less than those for the 254 seronegative cows, and milk production for seropositive cows (mean, 55.2 lb/cow/d) was 2.5 lb/cow/d less than that for seronegative cows (mean, 57.7 lb/cow/d). Analysis of results from Dairy Herd Improvement Association testing revealed that production of seropositive cows was less for milk (3.1 lb/cow/d), fat-corrected milk (3.6 lb/cow/d), and fat (0.14 lb/cow/d) than production of seronegative cows. Clinical Implications - The economic impact of N caninum infection in dairy cows can include reduced revenues from decreased milk production, which may warrant culling of young, seropositive replacement stock.

Original languageEnglish (US)
Pages (from-to)672-674
Number of pages3
JournalJournal of the American Veterinary Medical Association
Volume210
Issue number5
StatePublished - Mar 1 1997

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Neospora
Neospora caninum
Lactation
milk production
Milk
dairy cows
lactation
cows
Infection
infection
Weights and Measures
Fats
milk
Dairy Herd Improvement Associations
Analysis of Variance
Economics
Prospective Studies
Antibodies

ASJC Scopus subject areas

  • veterinary(all)

Cite this

Effect of Neospora caninum infection on milk production in first-lactation dairy cows. / Thurmond, Mark; Hietala, Sharon K.

In: Journal of the American Veterinary Medical Association, Vol. 210, No. 5, 01.03.1997, p. 672-674.

Research output: Contribution to journalArticle

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