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

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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

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culling (animals)
dairy cattle
morbidity
Morbidity
cows
Mortality
Mastitis
Health
calves
Infertility
Retained Placenta
Endemic Diseases
mastitis
Enteritis
Incidence
incidence
Diarrhea
footrot
Pneumonia
retained placenta

ASJC Scopus subject areas

  • Food Animals
  • Animal Science and Zoology

Cite this

Mortality, morbidity, case-fatality, and culling rates for California dairy cattle as evaluated by the national animal health monitoring system, 1986-87. / Gardner, Ian; Hird, David W.; Utterback, William W.; Danaye-Elmi, Cyrus; Heron, Billy R.; Christiansen, Kathy H.; Sischo, William M.

In: Preventive Veterinary Medicine, Vol. 8, No. 2-3, 01.01.1990, p. 157-170.

Research output: Contribution to journalArticle

Gardner, Ian ; Hird, David W. ; Utterback, William W. ; Danaye-Elmi, Cyrus ; Heron, Billy R. ; Christiansen, Kathy H. ; Sischo, William M. / Mortality, morbidity, case-fatality, and culling rates for California dairy cattle as evaluated by the national animal health monitoring system, 1986-87. In: Preventive Veterinary Medicine. 1990 ; Vol. 8, No. 2-3. pp. 157-170.
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