Correlation of Occupation with Serologic Reactions for Brucella Abortus

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Abstract
Results apparently indicate that treatment and care of infected animals were responsible for the serological reactions noted in the 272 persons tested, and presumably for their infections. On the contrary, there would seem to be but a remote connection with the flesh of killed animals. Further study, however, is necessary finally to determine this point. Because undulant fever rarely correlates with titer of serum, the author thinks the usual strains of Brucella are probably nonpathogenic for man. However, pathogenic strains occur and vaccination is indicated for all who are likely to be directly exposed. Care must be exercised in interpretation of positive serologic tests among persons whose occupations bring them into immediate contact with cattle or with Brucella, since a large % of healthy persons so employed give positive reactions.

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