Advances in dairy Research
Open Access
ISSN: 2329-888X
+44 1300 500008
ISSN: 2329-888X
+44 1300 500008
Enrique Herrera
Agriculture and Livestock Research,
Cuajimalpa, Mexico City
Mexico
Research Article
Serological Monitoring of Brucellosis in Female Calves Born from Infected Herds from Birth to their First Calving
Author(s): Ana Fernández, Enrique Herrera, Efren Díaz, Gabriela Palomares and Francisco SuárezAna Fernández, Enrique Herrera, Efren Díaz, Gabriela Palomares and Francisco Suárez
The aim of this study was to determine the frequency of brucellosis contagion of female calves born from seropositive and seronegative cows in brucellosis-infected herds. Brucellosis was monitored by serological analysis of 192 female calves from ten stables. Eight of these stables corresponded to family dairy herds, which had been vaccinated with S19; one was a semi-intensive herd vaccinated with RB51 and the last one was an intensive herd vaccinated with both vaccines. Monthly blood samples were taken from the female calves, from birth up to nine months of age; later, blood samples were taken at 12, 15, 18, 21, 24 months, and during delivery or abortion. Blood samples were analysed with Rose Bengal, rivanol and radial immunodiffusion tests to detect the appearance of seropositivity. A total of 192 female calves were evaluated and only 23% (45/192) were seropositive to brucellosis du.. View More»
DOI:
10.4172/2329-888X.1000207