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The incidence of tuberculosis among North Carolina migrant farmworkers, 1991.

S Ciesielski, D Esposito, J Protiva and M Piehl

Department of Family Practice, Natividad Medical Center, Salinas, CA 93912.

All locatable subjects (n = 94) for whom tuberculosis prevalence had been determined in an earlier study were tested with purified protein derivative (PPD) and control antigens, sputum sampling, and chest x-rays. Of the 46 who had been tuberculin negative (confirmed with control antigens) 3 years earlier, 2 had developed active tuberculosis in the interim and 14 (30%) were tuberculin positive. All had been engaged continuously in migrant farmwork. Lack of access to health care, an institutional feature of migrant farmwork, was significantly associated with primary infection.

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