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  4. Contact Investigation for Tuberculosis in Taiwan Contacts Aged under 20 Years in 2005
 
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Contact Investigation for Tuberculosis in Taiwan Contacts Aged under 20 Years in 2005

Resource
INTERNATIONAL JOURNAL OF TUBERCULOSIS AND LUNG DISEASE v.15 n.1 pp.50-55
Journal
INTERNATIONAL JOURNAL OF TUBERCULOSIS AND LUNG DISEASE
Journal Volume
v.15
Journal Issue
n.1
Pages
50-55
Date Issued
2011
Date
2011
Author(s)
LEE, CHIN-YUN  
CHAN, PEI-CHUN
URI
http://ntur.lib.ntu.edu.tw//handle/246246/240689
Abstract
OBJECTIVE: To measure the tuberculosis (TB) incidence rate and assess the relative risk of TB disease in contacts based on the tuberculin skin test (TST) and sputum status of index cases. DESIGN: All contacts aged < 20 years who were exposed to a TB case in 2005 were cross-matched using an electronic surveillance system to estimate TB incidence over a 24-month follow-up period. RESULTS: Among 6959 contacts there were 67 secondary cases (1%). The incidence was highest in the first year after exposure and decreased by half in the second year (P = 0.001). The relative risks of developing TB in contacts aged 0-4, 5-9, 10-14 and 15-19 years were respectively 325, 209, 337 and 53 times greater than for the general population. The hazard ratio of developing TB among contacts with a TST >= 15 mm induration was 12 times higher than for those with a TST < 5 mm (P = 0. 003). CONCLUSIONS: The relative risk of developing TB disease within 24 months of exposure was approximately 200- 300 times greater for contacts aged < 15 years. The majority developed TB within 12 months of exposure.
Subjects
contact investigation
latent TB infection
active case finding
infant and children
tuberculosis
SDGs

[SDGs]SDG3

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