Recurrent Tuberculosis and Exogenous Reinfection, Shanghai, China

摘要

Of 52 patients with recurrent tuberculosis in Shanghai,People's Republic of China, 32 (61.5%) had isolates inwhich genotype patterns of Mycobacterium tuberculosisdiffered between first and second episodes. This result indi-cates that exogenous reinfection is common in an area witha high incidence of tuberculosis