SEROEPIDEMIOLOGY OF GOAT PARATUBERCULOSIS IN FIVE MUNICIPALITIES OF CENTRAL VERACRUZ, MEXICO

Abstract

Seroprevalence of goat paratuberculosis and risk factors were determined in flocks from five municipalities in the center of the state of Veracruz, Mexico, by a cross-sectional study using a stratified multistage approach. Sample size was calculated with the program Win Episcope Version 2.0 using the mode "estimate percentages" for 50 % seroprevalence, 5 % error and 95 % confidence, resulting in 182 animals and six animals per flock. According to the tables by Cannon and Roe, a sample size of 26 flocks was obtained, of which six flocks were sampled in the municipality of Tlacolulan and five flocks in each of the remaining four municipalities (Chiconquiaco, Yecuatla, Coacoatzintla and Coatepec). Identification of antibodies against Mycobacterium avium ssp. paratuberculosis was made by indirect ELISA. Seroprevalence was determined with the program VassarStat® for calculating ratios, and the risk factors by odds ratio. Overall seroprevalence was 0.6 % (95 % CI: 0.03 - 3.5). Reactors were only observed in Coatepec. Seroprevalence by municipality was 20 % (95 % CI: 1.0 - 70.12) and by flock 3.85 % (95 % CI: 0.2 - 21.59). There were no risk or protective factors detected. In conclusion, goat paratuberculosis is scarcely distributed in flocks from central Veracruz.