Abnormal chest x-rays in intravenous drug users: implications for tuberculosis screening programs.
OBJECTIVE
The purpose of the study was to (1) determine the prevalence of significant abnormalities in routine chest x-rays used to screen for pulmonary tuberculosis in intravenous drug users and (2) evaluate the ability of the purified protein derivative skin test to identify persons with such abnormalities.


METHODS
We conducted a cross-sectional screening study on 1314 persons admitted to an opiate detoxification unit in an urban jail. Purified protein derivative tuberculin reactivity and the prevalence of abnormalities consistent with tuberculosis on screening chest x-rays were evaluated. The chest x-ray was obtained independent of the skin test.


RESULTS
The chest x-rays of 73 of the inmates (5.6%) showed abnormalities consistent with tuberculosis. Tuberculin skin testing missed 17 of 26 chest x-rays (65%) with significant infiltrates.


CONCLUSIONS
Purified protein derivative screening is insensitive to chest x-ray abnormalities that require additional diagnostic evaluation for tuberculosis. Routine chest studies should be performed on all intravenous drug users admitted to congregate housing settings.
Bellin
E
E
Montefiore-Rikers Island Health Service, East Elmhurst, NY 11370.
Fletcher
D
D
Safyer
S
S
D000328:Adult; D003430:Cross-Sectional Studies; D005188:False Negative Reactions; D006801:Humans; D008297:Male; D008400:Mass Chest X-Ray; D009519:New York City / Q000453:epidemiology; D016320:Substance Abuse Treatment Centers; D015819:Substance Abuse, Intravenous / Q000150:complications* / Q000534:rehabilitation; D014374:Tuberculin Test; D014397:Tuberculosis, Pulmonary / Q000150:complications / Q000453:epidemiology*