Preventive measures

*Close contacts of people with newly diagnosed infectious TB
*People with positive tuberculin skin tests and abnormal chest x-rays compatible with inactive TB (lesions caused by prior disease)
*HIV-positive people or those suspected to be HIV-infected who now have, or had at any time in the past, positive skin test reactions, but who do not have active infection
*Injection drug users who have positive skin test reactions.
*ventilation
*air filtration
*Isolation methods in hospitals, medical and dental offices, nursing homes, and prisons.
*If someone is believed to have been in contact with another person who has TB, preventive antibiotic treatment may have to be given.
*Infected persons need to be identified as soon as possible so that they can be isolated from others and treated.