Combate ã brucelosis bovina no Estado de São Paulo baseado na aplicação da brucella 19
Under the prevailing economic conditions in the State of São Paulo, bovine brucellosis cannot be successfully eradicated by the test-and-slaughter method. As a matter of fact, this method was tried a few years ago in some of out best dairy herds. However, the improvement of these herds, so far as their quality and milk production were concerned, did not balance the losses from the elimination of large numbers of reacting animalsFurthermore, no active protection against brucellosis was conferred to the remaining animals. In view of this fact, we have realized that the immunization of non-reacting animals with Strain 19, adult cattle as well as calves, would be advisableOf the disadvantages usually suggested against adult vaccination with Strain 19, the most important one is the development of serum agglutinins indistinguishable from those resulting from infection with virulent Brucella. However, a differentiation where positive agglutination tests occur, is now possible, according to the recent findings of Traum, et al., and Dick, et alConsidering the economic and material results associated with the incidence of the disase in this state, we deemed it a necessity to take immediate control measures involving a minimum of loss in animals. It seemed advisable to develop a plan of action in which calves 6-10 months old, as well as adult animals, were protected against brucellosisOur field ...(AU)
A plan for the control de bovine brucellosis en the State of Sao Paulo, based on the vaccination with strain 19
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