Epidemiologic approaches used in a herd health practice to investigate neonatal calf mortality

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Epidemiologic methods were applied in an investigation into causes of neonatal mortality on a 1400-cow dairy in the southern San Joaquin Valley of California. A format for collation of information on birthdate and date of death was assembled into a matrix which improved conceptualization of the data and which simplified procedures for estimation of mortality rates. Contemporary and birth cohort life table methods, mortality density estimations and relative risk assessment were used to ascertain if there were high-risk groups of calves that could be identified by age, day-of-the-week born, day-of-the-week died and sex. During the outbreak of neonatal diarrhea on this dairy, female calves were found to have experienced an atypically higher rate of mortality (10.7%) than did males (5.3%). Calves of both sexes died between the ages of 9 and 19 days. In addition, the risk of dying was 11 times greater for calves born on Wednesdays than for those born on Saturdays. These findings formed the basis for recommended changes in management of neonatal calves on the dairy.

Original languageEnglish (US)
Pages (from-to)317-328
Number of pages12
JournalPreventive Veterinary Medicine
Volume4
Issue number4
DOIs
StatePublished - Jan 1 1986
Externally publishedYes

Fingerprint

herd health
Infant Mortality
calves
Mortality
Health
Epidemiologic Methods
Life Tables
dairies
Disease Outbreaks
Diarrhea
neonatal mortality
Parturition
risk groups
gender
life tables
relative risk
risk assessment
diarrhea
dairy cows
valleys

ASJC Scopus subject areas

  • Food Animals
  • Animal Science and Zoology

Cite this

Epidemiologic approaches used in a herd health practice to investigate neonatal calf mortality. / Thurmond, Mark.

In: Preventive Veterinary Medicine, Vol. 4, No. 4, 01.01.1986, p. 317-328.

Research output: Contribution to journalArticle

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