Transmission dynamics of tuberculosis in Tarrant county, Texas - PubMed (original) (raw)
. 2002 Jul 1;166(1):36-42.
doi: 10.1164/rccm.2109089.
Affiliations
- PMID: 12091168
- DOI: 10.1164/rccm.2109089
Transmission dynamics of tuberculosis in Tarrant county, Texas
Stephen E Weis et al. Am J Respir Crit Care Med. 2002.
Abstract
To understand the transmission dynamics of tuberculosis in Tarrant County, Texas, we performed a population-based study of 159 patients with culture-proven tuberculosis, combining restriction fragment length polymorphism (RFLP) analysis of Mycobacterium tuberculosis isolates with prospective interviewing to identify epidemiologic links between patients. Patients whose isolates had identical or closely related RFLP patterns were considered a cluster. Seventy-six (48%) of 159 patients were in 19 clusters, suggesting that recent transmission accounted for 36% of tuberculosis morbidity. Unconditional logistic regression showed that birth in the United States, continuous residence in Tarrant County, a history of homelessness, and a history of visiting or working in bars were independent predictors of clustering. Four homeless shelters and five bars were associated with specific clusters, suggesting that they were sites of tuberculosis transmission. Patients in some clusters recognized more photographs of patients in their cluster than did patients outside their cluster. We conclude that (1) homeless shelters and bars are important sites of tuberculosis transmission in Tarrant County, and (2) the use of photograph recognition of patients with tuberculosis, in combination with RFLP analysis, has the potential to enhance tuberculosis control by facilitating identification of epidemiologic links between patients.
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