Risk factors for tuberculosis among health care workers in South India: a nested case-control study

HCWs with frequent patient contact and those with BMI <19 kg/m2 were at high risk of acquiring active TB. Nosocomial transmission of TB was pronounced in locations, such as medical wards and microbiology laboratories. Surveillance of high-risk HCWs and appropriate infrastructure modifications may be important to prevent interpersonal TB transmission in health care facilities.