| Popis: |
Brucellosis, leptospirosis, bovine viral diarrhea (BVD) and bovine infectious rhinotracheitis (IBR) are abortive diseases that compromise productive efficiency in cattle. In different municipalities of Oaxaca, Mexico, reproductive problems suggestive of these diseases have been observed. This study determined the frequency of DVB, IBR, brucellosis and leptospirosis in dual-purpose cattle herds in different regions of Oaxaca Mexico. A total of 2,691 blood samples were collected from 127 bovine herds to diagnose brucellosis serologically using the rose bengal and Rivanol tests; microscopic agglutination test (MAT) with a battery of six Leptospira serovars; ELISA by blocking and indirect for BVD and IBR respectively. The apparent overall frequency of herd was brucellosis: 2.3%, leptospirosis: 86.6%, IBR: 65.4% and BVD: 56.7%. The real frequency for brucellosis, leptospirosis, IBR and BVD was -9.1% (CI95 = -10.1, -7.9%), 64.3% (CI95 = 62.5, 66.1%), 40.1% (IC95 = 38.2, 41.9%) and 33.2 % (IC95 = 31.4, 35.0%) respectively. In the Costa region, the highest percentage of animals with antibodies against Leptospira, IBR and BVD was observed. The present study showed serologically the presence of antibodies against brucellosis, IBR, DVB and six serovars of Leptospira in bovine herds double purpose of the state of Oaxaca, Mexico. |
