Evaluation of productive indicators in goat herds vaccinated with RB51–SOD, RB51 (Brucella abortus) and Rev-1 (Brucella melitensis) strains
DOI:
https://doi.org/10.22319/rmcp.v12i1.5273Keywords:
Vaccination, Abortions, Brucellosis, Goats, RB51- SODAbstract
Kidding rates, miscarriages and births of weak offspring were determined in herds vaccinated with the RB51-SOD (B. abortus) strain in order to evaluate the productive improvement and compare it with Rev-1 (B. melitensis) and RB51 (B. abortus) vaccines. Three subgroups of 36 goats each were vaccinated with Rev-1 (1-2x109 CFU), RB51 (3x108-3x109 CFU) and RB51-SOD (3x108-3x109 CFU) strains, with each strain having a control subgroup. Individual records were established for calculating post-vaccination rates in two kidding seasons. In the first, the kidding rate for Rev-1 was 66.6 % (95%CI: 48.9-80.9), RB51 50.0 % (95%CI:33.2-66.7), and RB51-SOD 69.4 % (95%CI:51.7-83.0). Miscarriages occurred in all three vaccinated subgroups, Rev-1 and RB51-SOD 5.5 % (95%CI: 0.9-20.0) and RB51 2.7 % (95%CI: 0.1-16.2). Weak offspring births occurred only in animals vaccinated with Rev-1 5.5 % (95%CI: 0.9-20.0). During the second epoch, the kidding rate in Rev-1 vaccinated females was 91.6 % (95% CI:76.4-97.8), RB51 94.4 % (95% CI:79.9-99.0), and RB51-SOD 94.4 % (95% CI:79.9-99.0). Animals vaccinated with Rev-1 and RB51 strains had 5.5 % (95%CI: 0.9-20.0) and 2.7 % (95%CI: 0.1-16.2) miscarriages, respectively; in vaccinated subgroups there were no births of weak offspring. The control subgroups behaved similarly to the vaccinated subgroups. Animals vaccinated with the RB51-SOD strain showed no significant difference from those that received the Rev-1 and RB51 strains, nor from the control subgroups (P>0.01); therefore, the RB51-SOD vaccine can generate protection against brucellosis and benefits in the production of goat herds.
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