{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,5,4]],"date-time":"2025-05-04T04:46:34Z","timestamp":1746333994422,"version":"3.37.3"},"reference-count":38,"publisher":"Wiley","license":[{"start":{"date-parts":[[2019,4,14]],"date-time":"2019-04-14T00:00:00Z","timestamp":1555200000000},"content-version":"unspecified","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Guangxi Centre for Disease Prevention and Control","award":["81560549","81460517","D43TW009522"],"award-info":[{"award-number":["81560549","81460517","D43TW009522"]}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["81560549","81460517","D43TW009522"],"award-info":[{"award-number":["81560549","81460517","D43TW009522"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["81560549","81460517","D43TW009522"],"award-info":[{"award-number":["81560549","81460517","D43TW009522"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000002","name":"National Institutes of Health","doi-asserted-by":"publisher","award":["81560549","81460517","D43TW009522"],"award-info":[{"award-number":["81560549","81460517","D43TW009522"]}],"id":[{"id":"10.13039\/100000002","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["BioMed Research International"],"published-print":{"date-parts":[[2019,4,14]]},"abstract":"<jats:p><jats:italic>Objective<\/jats:italic>. To evaluate the infectivity of<jats:italic>Mycobacterium tuberculosis<\/jats:italic>(<jats:italic>M.tb<\/jats:italic>) genotypes of index cases in the classroom of adolescent schools in Guangxi, China.<jats:italic>Methods<\/jats:italic>. Adolescent school tuberculosis (TB) contact investigations were conducted for all reported index TB cases from November 2016 to December 2017 in Guangxi, China. Genotypes of index cases and contact cases were identified by 15-loci mycobacterial interspersed repetitive units\u2013variable number tandem repeat and spoligotyping. Outcome variable was 5 levels\u2019 order of tuberculin skin test (TST) results to new active TB [0-5\u2009mm, 6-9\u2009mm, 10-14\u2009mm, \u2265 15\u2009mm (without TB), and \u226515\u2009mm (with TB)]. Multivariate ordered logistic regression analysis was performed to evaluate the independent effect of genotypes of index case on contact screening outcome.<jats:italic>Results<\/jats:italic>. Beijing genotype occurred more commonly in female index patients. One genotypic cluster of two index cases and one cluster of two contact cases were detected. The association between infectivity of Beijing genotype of index cases and outcome of contact investigation was statistically significant in univariate analysis but no so after adjustment for characteristics of contacts and sex of index cases (<jats:italic>P value<\/jats:italic>=0.057). Female index cases increased the chance for TB infection\/being active TB among contacts (ordinal odds ratio = 1.39, 95% confidence interval: 1.21, 1.60). Contacts who studied in the middle school, who with non-Han ethnicity and who without BCG scar had increased risk for TB infection\/being active TB.<jats:italic>Conclusion<\/jats:italic>. There was not enough evidence from our data to support that Beijing strains were more infective than non-Beijing strains in TB transmission in school setting.<\/jats:p>","DOI":"10.1155\/2019\/3980658","type":"journal-article","created":{"date-parts":[[2019,4,14]],"date-time":"2019-04-14T23:31:00Z","timestamp":1555284660000},"page":"1-9","source":"Crossref","is-referenced-by-count":4,"title":["Infectivity of<i>Mycobacterium tuberculosis<\/i>Genotypes and Outcome of Contact Investigation in Classroom in Guangxi, China"],"prefix":"10.1155","volume":"2019","author":[{"given":"Dongxiang","family":"Pan","sequence":"first","affiliation":[{"name":"School of Public Health, Guangxi Medical University, Nanning, Guangxi, 530021, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Prasit","family":"Palittapongarnpim","sequence":"additional","affiliation":[{"name":"Department of Microbiology, Faculty of Science, Mahidol University, Bangkok, 10700, Thailand"},{"name":"National 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