Prevalence and risk factors for brucellosis in goats in areas of Mexico with and without brucellosis control campaign

D. Oseguera Montiel, K. Frankena, H.M.J. Udo, N.M. Keilbach Baer, A.J. van der Zijpp

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15 Citations (Scopus)


Brucellosis is a major constraint for small-scale goat farming systems in Mexico. This study estimated the prevalence of testing positive to brucellosis and identified and quantified risk factors in goats from small-scale farms of Michoacán that had participated in a brucellosis campaign (i.e. vaccination, serological testing, culling and awareness) and of Jalisco that had negligible brucellosis campaign participation. A cross-sectional serological survey was conducted among 1,713 goats of 83 flocks. The prevalence of testing positive to brucellosis was higher (38 %) in Jalisco than in Michoacán (11 %). Logistic regression analysis indicated that goats from Michoacán had lower odds to test positive for brucellosis (odds ratio (OR)=0.32, 95 % confidence interval (CI) 0.21–0.48) compared to goats from Jalisco. Goats in zero-grazing systems had lower odds than goats in grazing systems (OR=0.22, 95 % CI 0.09–0.57). When goats were kept in pens with low density (0.002 to 0.22 goat/m2), odds was lower (OR=0.44, 95 % CI 0.28–0.67) compared to goats kept in pens with higher density (0.23 to 1 goat/m2). Odds was higher for testing positive when farmers bought goats from goat traders (OR=1.82,95 % CI 1.15–2.87) compared to farmers who did not. If scavenger poultry had access to goat pens, the odds was half (OR=0.52, 95 % CI 0.33–0.83) of those where poultry had no access. Regular disinfection of the pen reduced the odds (OR=0.66, 95 % CI 0.44–0.99) compared to where disinfection was not regular. The brucellosis control campaign was effective in reducing brucellosis seropositivity.
Original languageEnglish
Pages (from-to)1383-1389
JournalTropical Animal Health and Production
Issue number6
Publication statusPublished - 2013


  • melitensis infection
  • tests
  • seroprevalence
  • vaccination
  • model
  • rev-1
  • sheep


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