Seroepidemiology of Infection with Neospora Caninum, Leptospira , and Bovine Herpesvirus Type 1 in Water Buffaloes (Bubalus Bubalis) in Veracruz, Mexico.

We aimed to determine the seroprevalence of infection with Neospora caninum, Leptospira , and bovine herpesvirus type 1 and risk factors associated with these infections in water buffaloes in Veracruz State, Mexico. Through a cross-sectional study, 144 water buffaloes (Bubalus bubalis) raised in 5 ranches of Veracruz were examined for anti-N. caninum and anti-bovine herpesvirus type 1 antibodies by enzyme immunoassays, and anti-Leptospira interrogans antibodies by microscopic agglutination test. Of the 144 buffaloes studied, 35 (24.3%) were positive for N. caninum , 50 (34.7%) for Leptospira , and 83 (57.6%) for bovine herpes virus. The frequencies of leptospiral serovars in buffaloes were as follows: 18.7% for Muenchen ( n = 27), 10.4% for Hardjo LT ( n = 15), 9.0% for Pyrogenes ( n = 13), and 4.8% for Icterohaemorrhagiae ( n = 7). Seropositive buffaloes were found in all 5 ranches studied. Logistic regression showed that cohabitation of buffaloes with cows was associated with infection with Leptospira (odds ratio [OR], 2.2; 95% confidence interval [CI], 1.04-4.5; P = 0.03) and bovine herpesvirus (OR, 12.0; 95% CI, 4.0-36.2; P < 0.01). This is the first study that provides serological evidence of N. caninum, Leptospira , and bovine herpesvirus type 1 infections in water buffaloes in Mexico. Our findings could be used to enhance preventive measures against these infections.