title: The discovery of an unusual cause of indoor radiation pollution.
abstract: The objective of our study is to investigate the reasons why 21 persons suffered erythema and other skin changes, and conjunctivae infection after staying in a closed room for three hours. A multi-disciplinary case study including interviews, building and ventilation inspections, was performed by a multidisciplinary team comprising a medical epidemiologist, and an industrial hygienist. A self-administered questionnaire was designed to determine the magnitude of the health problem of the affected students. By a process of investigative elimination, we deduced that the symptoms were caused by accidental exposure to ultraviolet C radiation where it was radiated from the germicidal ultraviolet lamps. The most common symptoms and signed presented were erythema of skin and conjunctivae infection. The erythema of skin and conjunctivae infection arose from exposure to ultraviolet C radiation and that safeguards are needed to ensure ultraviolet germicidal lamps are not accidentally switched on while a room is occupied.
authors.affiliation: Department of Community Medicine, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand. cnaesi@kku.ac.th
authors.forename: N
authors.initials: N
authors.lastname: Chaiear
authors.forename: N
authors.initials: N
authors.lastname: Saejiw
authors.forename: S
authors.initials: S
authors.lastname: Dithisawatwet
authors.forename: P
authors.initials: P
authors.lastname: Polpila
authors.forename: K
authors.initials: K
authors.lastname: Paratako
authors.forename: K
authors.initials: K
authors.lastname: Chuntum
mesh_terms: D000328:Adult; D000396:Air Pollutants, Radioactive / Q000009:adverse effects*; D016902:Air Pollution, Indoor / Q000009:adverse effects*; D003228:Conjunctiva / Q000528:radiation effects; D004890:Erythema / Q000209:etiology*; D005260:Female; D006801:Humans; D007407:Interviews as Topic; D008297:Male; D012867:Skin / Q000528:radiation effects; D013337:Students, Medical; D011795:Surveys and Questionnaires; D013785:Thailand; D014466:Ultraviolet Rays / Q000009:adverse effects*
chemical_list: D000396:Air Pollutants, Radioactive