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Volume 17, Number 3—March 2011

Research

Tuberculosis Outbreak Investigations in the United States, 2002–2008

Kiren MitrukaComments to Author , John E. Oeltmann, Kashef Ijaz, and Maryam B. Haddad
Author affiliations: Author affiliation: Centers for Disease Control and Prevention, Atlanta, Georgia, USA

Main Article

Table 2

Tuberculosis risk factors for patients in CDC–investigated TB outbreaks, United States, 2002–2008*

Risk factor†
No. (%) patients
Total 398 (100)
Medical
HIV co-infection 46 (12)‡
Diabetes 23 (6)
Immunosuppression (not HIV associated) 14 (4)
History of TB 16 (4)
Incomplete treatment
7 (44)
Social
Any substance abuse 233 (58)
Alcohol abuse 204 (51)
Nonintravenous drug use 117 (29)
Intravenous drug use 19 (5)
Incarceration history§ 126 (32)
Homelessness 78 (20)

*TB, tuberculosis; CDC, Centers for Disease Control and Prevention.
†As documented in CDC reports of onsite investigation with information generally gathered through patient chart reviews or interviews.
‡Minimum estimate because complete data on the number of patients tested were not available.
§Time frame before TB diagnosis not always documented in CDC reports. The National Tuberculosis Surveillance System collects data on incarceration at time of TB diagnosis.

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