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Free Content Annual risk of tuberculosis infection in West Sumatra Province, Indonesia

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OBJECTIVE: To estimate the annual risk of tuberculosis infection (ARTI) among children attending elementary school Classes I–III in West Sumatra Province, Indonesia.

METHODS: The survey was designed to estimate ARTI among children, irrespective of BCG scar status. Fieldwork was carried out in 72 schools selected by two-stage sampling. Children were administered 2 TU of purified protein derivative RT23 with Tween 80 intradermally on the mid-anterior aspect of the left forearm. The maximum transverse diameter of induration was measured at about 72 h. Analysis was carried out among 5653 satisfactorily test-read children aged 6–9 years.

RESULTS: The estimation by mirror-image method among all children (without and with BCG scar) revealed an ARTI of between 1% and 1.3%. The estimated ARTIs among children without and with BCG scar varied between 0.8–1.3% and 0.9–1.4%, respectively, using the mirror-image method, anti-mode method and mixture model.

CONCLUSION: Tuberculosis control efforts need to be intensified to reduce the risk of transmission of infection.
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Keywords: Indonesia; annual risk; infection; tuberculin survey; tuberculosis

Document Type: Regular Paper

Affiliations: 1: Centre for Health Research, University of Indonesia, Jakarta, Indonesia 2: National TB Programme, Directorate General of Communicable Disease Control and Environmental Health, Jakarta, Indonesia 3: World Health Organization, Jakarta, Indonesia 4: World Health Organization, Jakarta, Indonesia; and National Tuberculosis Institute, Bangalore, India 5: World Health Organization, Jakarta, Indonesia; and European Centre for Disease Prevention and Control, Stockholm, Sweden 6: National Tuberculosis Institute, Bangalore, India

Publication date: 01 March 2008

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  • The International Journal of Tuberculosis and Lung Disease publishes articles on all aspects of lung health, including public health-related issues such as training programmes, cost-benefit analysis, legislation, epidemiology, intervention studies and health systems research. The IJTLD is dedicated to the continuing education of physicians and health personnel and the dissemination of information on tuberculosis and lung health world-wide.

    Certain IJTLD articles are selected for translation into French, Spanish, Chinese or Russian. They are available on the Union website

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