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Abstract
Blood samples obtained from 551 employees of an abattoir were tested for brucellosis antibodies, and 12.9% were found reactive. This rate was 40% among workers who had contact with warm pork, 17% among these who had contact with only warm beef, and 5% among the administrative and clerieal staff. The greatest inerease in reactive sera occurred after one to three years of employment. Titers were present in 5% of those who wore glasses and in 19% of those who did not. There was no apparent difference in reactor rates by sex, but 31% of the non-white men had titers, compared with 6% of the white men. This was not a factor of work location. There was no apparent association between brucellosis titers and number of absences from work in the past 42 months.