INTRODUCTION
Tuberculosis is an occupational disease of HCWs. The infected patient being the primary source of infection must be treated with caution to protect the HCWs, other patients and visitors in various clinical settings.1 Nurses and other HCWs in various health care settings encounter different contagious diseases. Miller and colleagues investigated nosocomial transmission of mycobacterium tuberculosis among US HCWs. They found that among HCWs with potential TB exposure, elevated risks were found for nurses. Nurses are at high risk for occupationally contracted TB infection compared to other HCWs because of long working hours, and in developing countries nurses work often in overcrowded healthcare settings.1,2 Occupationally contrated TB has led to excessive sick leaves and sometimes deaths of HCWs, reducing the quality of healthcare