Mortality, morbidity, case-fatality, and culling rates for California dairy cattle as evaluated by the national animal health monitoring system, 1986-87

Ian Gardner, David W. Hird, William W. Utterback, Cyrus Danaye-Elmi, Billy R. Heron, Kathy H. Christiansen, William M. Sischo

Research output: Contribution to journalArticle

57 Scopus citations

Abstract

During 1986 and 1987, mortality, morbidity, case-fatality, and culling rates were estimated for endemic disease conditions in 43 randomly selected California dairy farms. Data were collected mainly by farmer interview. Age-specific mortality rates were: calves 22.8 per 1000 calf-months at risk; young stock 1.2 and cows 2.0 per 100 animal-years at risk. No bulls died during the observational period. For calves, diarrhea/enteritis and pneumonia had the highest incidence rates, 115.8 and 76.5 per 1000 calf-months at risk, respectively. Average incidence rates per 100 cow-years for the five most commonly reported cow diseases were: mastitis 30.3; infertility 7.9; metritis 7.0; footrot 5.5; retained placenta 4.7. The highest case-fatality rate was 32% for cows with traumatic reticulitis (hardware disease). About 25% of all cows were culled. Low production, infertility, and mastitis accounted for 87.6% of all culled cows. Characteristics of participating herds and diagnostic criteria are presented. Limitations of the data and of the collection methods are discussed.

Original languageEnglish (US)
Pages (from-to)157-170
Number of pages14
JournalPreventive Veterinary Medicine
Volume8
Issue number2-3
DOIs
StatePublished - Jan 1 1990

ASJC Scopus subject areas

  • Food Animals
  • Animal Science and Zoology

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