Foreign travel is a key risk factor.
However, tuberculosis infection can result from exposures in the United States. In addition, if active tuberculosis occurs in a service member in the closed-ventilation environment of a ship, the rate of transmission of tuberculosis infection to shipmates can be high, even up to 25 percent. The Navy's Tuberculosis Control Program addresses the risks of Tuberculosis by providing guidance for the prevention and management of this disease. Monitoring those known to be infected for evidence of active disease. Early identification and treatment of persons with active tuberculosis to limit transmission.