Risk factors for brucellosis seropositivity of goat herds in the Mexicali Valley of Baja California, Mexico

Andrea B. Mikolon, Ian Gardner, Jorge Hernandez De Anda, Sharon K. Hietala

Research output: Contribution to journalArticlepeer-review

31 Scopus citations

Abstract

A case-control study was conducted in the Mexicali Valley to identify risk factors for goat-herd seropositivity for Brucella melitensis. Nineteen case herds (≥2 positive results with the 8% rose bengal plate test (RBT)) and 55 control herds (zero positive results in RBT), matched for herdsize and geographic location, were enrolled. Conditional logistic regression was used to construct a multivariable model of the odds of seropositivity using variables assessed in a questionnaire administered to goat ranchers. The final model for herd seropositivity included increased risk from importation of goats from other Mexican states, the presence of La Mancha breed does, and the presence of does born outside the herd. Increasing herdsize was also highly significant (p<0.01). In addition, a significant (p<0.05) positive association was found between the presence of seropositive dogs (as assessed by RBT) and seropositive goats on the same ranch.

Original languageEnglish (US)
Pages (from-to)185-195
Number of pages11
JournalPreventive Veterinary Medicine
Volume37
Issue number1-4
DOIs
StatePublished - Dec 1 1998

Keywords

  • Brucella melitensis
  • Case-control study
  • Goat
  • Mexico

ASJC Scopus subject areas

  • Food Animals
  • Animal Science and Zoology

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