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Respiratory health among office workers in Malaysia and endotoxin and (1,3)-b-glucan in office dust


Lim, Fang Lee and Hashim, Zailina and Thian, Leslie Lung Than and Md Said, Salmiah and Hashim, Jamal and Norbäck, Dan (2019) Respiratory health among office workers in Malaysia and endotoxin and (1,3)-b-glucan in office dust. International Journal of Tuberculosis and Lung Disease, 23 (11). pp. 1171-1177. ISSN 1027-3719; ESSN: 1815-7920


Objective: To examine the associations between endotoxin and (1,3)-β-glucan concentrations in office dust and respiratory symptoms and airway inflammation among 695 office workers in Malaysia. Methods: Health data were collected using a questionnaire, sensitisation testing and measurement of fractional exhaled nitric oxide (FeNO). Indoor temperature, relative air humidity (RH) and carbon dioxide (CO 2) were measured in the offices and settled dust was vacuumed and analysed for endotoxin and (1,3)-β-glucan concentrations. Associations were analysed by two level multiple logistic regression. Results: Overall, 9.6% of the workers had doctor-diagnosed asthma, 15.5% had wheeze, 18.4% had daytime attacks of breathlessness and 25.8% had elevated FeNO (≥25 ppb). The median levels in office dust were 11.3 EU/mg endotoxin and 62.9 ng/g (1,3)-β-glucan. After adjusting for personal and home environment factors, endotoxin concentration in dust was associated with wheeze (P = 0.02) and rhino conjunctivitis (P = 0.007). The amount of surface dust (P = 0.04) and (1,3)-β-glucan concentration dust (P = 0.03) were associated with elevated FeNO. Conclusion: Endotoxin in office dust could be a risk factor for wheeze and rhino conjunctivitis among office workers in mechanically ventilated offices in a tropical country. The amount of dust and (1,3)-β-glucan (a marker of indoor mould exposure) were associated with Th2 driven airway inflammation.

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Official URL or Download Paper: https://pubmed.ncbi.nlm.nih.gov/31718753/

Additional Metadata

Item Type: Article
Divisions: Faculty of Medicine and Health Science
DOI Number: https://doi.org/10.5588/ijtld.18.0668
Publisher: International Union Against Tuberculosis and Lung Disease
Keywords: Asthma; Fractional exhaled nitric oxide; Microbial; Rhinoconjunctivitis; Tropical
Depositing User: Mr. Sazali Mohamad
Date Deposited: 13 Aug 2021 09:48
Last Modified: 13 Aug 2021 09:48
Altmetrics: http://www.altmetrics.com/details.php?domain=pasir.upm.edu.my&doi=10.5588/ijtld.18.0668
URI: http://psasir.upm.edu.my/id/eprint/82001
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