Validity of Using Tuberculin Skin Test Erythema Measurement for Contact Investigation during a Tuberculosis Outbreak in Schoolchildren Previously Vaccinated with BCG
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概要
- 論文の詳細を見る
BACKGROUND: Few studies have examined the validity of administering tuberculosis control measures based on tuberculin skin test (TST) erythema measurement. The present study aimed to clarify the relationship between the erythema and the induration seen following TST and to evaluate the validity of diagnosing tuberculosis infection based on the erythema following TST in school-aged contacts who had been vaccinated with bacillus Calmette-Guérin (BCG) in infancy.METHODS: A 56-month longitudinal study from January 1999 through September 2003 followed 566 junior high school students in Kochi City who were contacts of an infectious tuberculosis case. To evaluate the diagnostic accuracy of the erythema and induration following TST of the contacts, false-positive and false-negative TST results were noted.RESULTS: The natural logarithm of the erythematous response size was linearly related to the induration size. When the size of the erythematous response was used to determine the presence of tuberculosis infection, the proportion of infected children increased with increasing exposure to the index case. When the TST results in the contact investigation were interpreted together with the change in the size of the erythematous response from that observed at the regular school-entry checkup, false positive test results were avoidable among the students who had a large erythematous response after the contact investigation TST, but whose response was only slightly larger than their erythematous response following the school-entry TST. Among the students whose TST results were negative, 1.9% developed tuberculosis.CONCLUSION: Both erythema and induration measurement were equally effective for identifying tuberculosis infection in schoolchildren vaccinated with BCG.J Epidemiol2005;15:56-64.
- Japan Epidemiological Associationの論文
- 2005-03-01
著者
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Ohara Hiroshi
Department of Internal Medicine, Ohmura Municipal Hospital
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Ohara H
Department Of Public Health Kochi Medical School
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YASUDA NOBUFUMI
Department of Public Health, Kochi Medical School
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Ohara Hiroshi
Department Of Clinical Pharmacy Tohoku University Graduate School Of Pharmaceutical Sciences
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TOIVGOOGIIN Aira
Department of Public Health, Kochi Medical School
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TOYOTA Makoto
Kochi City Health Center
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Yasuda N
Department Of Public Health Kochi Medical School
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Yasuda Nobufumi
Department Of Public Health Kochi Medical School
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Toyota Makoto
Department Of Public Health Kochi Medical School
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Toivgoogiin Aira
Department Of Public Health Kochi Medical School
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