None of the asymptomatic patients had evidence of active tuberculosis. Only one of 82 with a positive PPD had an abnormality on x-ray. Repeat test for indeterminate results at 3 to 6 months. Agglutination assays for IgG are preferred. IgM is not useful.
Some authorities recommend screening all patients.
Common charges are based on survey of five laboratories. The Johns Hopkins University on behalf of its Division of Infectious Diseases and AIDS Service. All rights reserved. Physicians and other health care professionals are encouraged to consult other sources and confirm the information contained in this site because no single reference or service can take the place of medical training, education, and experience. Consumers are cautioned that this site is not intended to provide medical advice about any specific medical condition they may have or treatment they may need and they are encouraged to call or see their physician or other health care provider promptly with any health related questions they may have.