Changes of symptoms, tear film stability and eosinophilic cationic protein in nasal lavage fluid after re-exposure to a damp office building with a history of flooding
2007 (English)In: Indoor Air, ISSN 0905-6947, E-ISSN 1600-0668, Vol. 17, no 1, 19-27 p.Article in journal (Refereed) Published
The aim was to study health effects in office workers (N = 18) in a medical case book archive with dampness caused by flooding. They were first investigated in a building without dampness (exposure free for 10 days). Then all returned to the damp building, and were re-investigated after 2 days. We measured tear film break up time (BUT), nasal patency, biomarkers in nasal lavage (NAL), and dynamic spirometry. Both buildings had low CO2 (380-600 ppm), low levels of respirable particles (8-10 μg/m3), and formaldehyde (5-7 μg/m3). The flooded building had slightly higher (149 ng/m3 vs. 94 ng/m3) levels of microbial volatile organic compounds (MVOC). After 2 days of re-exposure, there was an increase of ocular (P < 0.001), nasal (P = 0.002), and throat symptoms (P < 0.001), dyspnea (P = 0.006), headache (P = 0.002), nausea (P = 0.04), and tiredness (P = 0.01). The median BUT decreased from 16 to 8 s (P = 0.003), and eosinophilic cationic protein (ECP) in NAL increased slightly (P = 0.04). A separate test of the weekday effect showed slight improvements, or no change of symptoms and signs from Monday to Wednesday. In conclusion, subjects previously exposed to building dampness had an increase of symptoms, reduced tear film stability, and signs of eosinophilic inflammation in the nasal mucosa after 2 days of re-exposure.
Place, publisher, year, edition, pages
2007. Vol. 17, no 1, 19-27 p.
Adult, Biological Markers/analysis, Environment; Controlled, Eosinophil Cationic Protein/*analysis, Eye Diseases/etiology, Female, Humans, Humidity, Male, Middle Aged, Nasal Lavage Fluid/*chemistry, Occupational Exposure/*adverse effects, Respiratory Function Tests, Respiratory Tract Diseases/*etiology/physiopathology, Rhinometry; Acoustic, Tears/chemistry/*physiology
Medical and Health Sciences
IdentifiersURN: urn:nbn:se:uu:diva-11679DOI: 10.1111/j.1600-0668.2006.00441.xISI: 000243791600002PubMedID: 17257149OAI: oai:DiVA.org:uu-11679DiVA: diva2:39448