Publication: Detection of airborne Mycobacterium tuberculosis complex in high-risk areas of health care facilities in Thailand
Issued Date
2019-04-01
Resource Type
ISSN
18157920
10273719
10273719
Other identifier(s)
2-s2.0-85065789606
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Mahidol University
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SCOPUS
Bibliographic Citation
International Journal of Tuberculosis and Lung Disease. Vol.23, No.4 (2019), 465-473
Suggested Citation
J. Sornboot, W. Aekplakorn, P. Ramasoota, S. Bualert, S. Tumwasorn, W. Jiamjarasrangsi Detection of airborne Mycobacterium tuberculosis complex in high-risk areas of health care facilities in Thailand. International Journal of Tuberculosis and Lung Disease. Vol.23, No.4 (2019), 465-473. doi:10.5588/ijtld.18.0218 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/51776
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Title
Detection of airborne Mycobacterium tuberculosis complex in high-risk areas of health care facilities in Thailand
Abstract
© 2019 The Union. SETTING: In high-risk areas (sputum collection room in a tuberculosis [TB] clinic, patient rooms in a TB ward, the emergency department and the bronchoscopy unit) in seven health care facilities located in central Thailand. OBJECTIVE : To detect airborne Mycobacterium tuberculosis complex and other environmental parameters using the liquid impinger and real-time quantitative polymerase chain reaction (real-time qPCR) technique in high-risk areas. DESIGN: Cross-sectional study. RESULTS : M. tuberculosis was detected in 3 of 99 (3.0%, 95%CI 0.6-8.6) areas: One sputum collection room and one TB in-patient room in one facility and one sputum collection room in another facility. In these three areas, the M. tuberculosis copy number/m3 ranged from 9.6 to 1671. Lower air change rate (,6 h-1), higher relative humidity (.65%), and contact with coughing patient(s) were more common in airborne M. tuberculosis- positive areas than in M. tuberculosis-negative areas. CONCLUS IONS : Air sampling using a liquid impinger followed by real-time qPCR is effective for quantitative detection of airborne M. tuberculosis in high-risk areas. Our findings indicate TB risk among health care workers, and suggest that improved ventilation, enhanced appropriate cough etiquette and respiratory protection are needed to mitigate M. tuberculosis transmission.