Abstract

GODOY, Pere et al. Contact investigation according to concentric circles in a case of laryngeal tuberculosis. Gac Sanit [online]. 2013, vol.27, n.3, pp.279-281. ISSN 0213-9111.  https://dx.doi.org/10.1016/j.gaceta.2012.10.006.

Objective: To describe the census and contact investigation in a case of laryngeal tuberculosis. Methods: Based on a patient with laryngeal tuberculosis and through interviews and ocular inspection, we established three circles of contacts. The tuberculin test was performed (positive ≥ 5mm). Persons testing positive were invited to undergo a chest x-ray. The association of the infection was calculated with the odds ratio. The exposure-response relationship was determined with the linear trend χ² test. Results: The overall prevalence of infection was 39.9% (67/168). The prevalence among coworkers was 60.0% (24/40), that among frequenters of the town bar was 43.3% (13/30) and the conversions rate was 12.9%. There was a relationship with the degree of exposure (p <0.0001). Conclusions: Laryngeal tuberculosis involved high transmission to coworkers and frequenters of the town bar. In-depth studies through concentric circles and good communication with exposed individuals should be carried out.

Keywords : Contact investigation; Tuberculosis; Laryngeal tuberculosis; Cavitary tuberculosis; Epidemiology; Latent tuberculosis infection; Treatment; Bar.

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