Yi Wu Zheng1, Xu Xin Lai1, De Yu Zhao2, Chun Qing Zhang3, Jian Jun Chen4, Luo Zhang5, Qing Yu Wei6, Shi Chen7, En Mei Liu8, Dan Norback9, Birgitte Gjesing1, Nan Shan Zhong3, D Michael Spangfort1. 1. Research Asia Pacific, ALK, Guangzhou 510230, Guangdong, China. 2. Department of Respiratory Medicine, the Affiliated Children's Hospital of Nanjing Medical University, Nanjing 210005, Jiangsu, China. 3. State Key Laboratory of Respiratory Disease, the First Affiliated Hospital, Guangzhou Medical University, Guangzhou 510230, Guangdong, China. 4. ENT Department of Wuhan Union Hospital, Wuhan 430012, Hubei, China. 5. ENT Department of Beijing Tongren Hospital, Beijing 100730, China. 6. Allergology Department of Shenyang 202 Hospital, Shenyang 110055, Liaoning, China. 7. Asthmatic Children's Immunotherapy Center of People's Hospital of Hainan Province, Haikou 570311, Hainan, China. 8. Respiratory Department, Children's Hospital of Chongqing Medical University, Chongqing 400014, China. 9. Department of Medical Science and Occupational and Environmental Medicine, University Hospital, Uppsala University, Uppsala 75105, Sweden.
Abstract
OBJECTIVE: Chinese allergic subjects have high levels of sensitization to house dust mite (HDM) and other indoor allergens. This study quantifies common indoor allergen levels in Chinese households. METHODS: Dust samples were collected from nine cities. Major allergens Der p 1 and Der f 1 from Dermatophagoides pteronyssinus and D. farinae, and specific antigens of Blomia tropicalis, Tyrophagus putrescentiae, Acarus siro, and cockroach species Blattella germanica and Periplaneta americana were measured by ELISA. RESULTS: HDM allergens were found in dust samples from bedding in 95% of the Chinese households. The median levels varied from <0.006 to 9.2 µg/g of dust, depending on the city. The percentages of households having HDM allergen levels associated with the risk of developing allergy sensitization and asthma were 65% and 25%, respectively. Specific antigens of the storage mite and cockroach were only found in samples from the southern and tropical regions of China. Levels of mite allergens were generally higher in samples from bedding compared to samples from the living room, even for storage mites, whereas levels of cockroach antigens were higher in the living room samples. CONCLUSION: HDM allergens are present in bedding dust samples from most Chinese households. Cities in southern and central China have relatively high levels of HDM major allergens compared to cities in northern and western China. Antigens of storage mites and cockroaches are not as common as HDM allergens.
OBJECTIVE: Chinese allergic subjects have high levels of sensitization to house dust mite (HDM) and other indoor allergens. This study quantifies common indoor allergen levels in Chinese households. METHODS: Dust samples were collected from nine cities. Major allergens Der p 1 and Der f 1 from Dermatophagoides pteronyssinus and D. farinae, and specific antigens of Blomia tropicalis, Tyrophagus putrescentiae, Acarus siro, and cockroach species Blattella germanica and Periplaneta americana were measured by ELISA. RESULTS: HDM allergens were found in dust samples from bedding in 95% of the Chinese households. The median levels varied from <0.006 to 9.2 µg/g of dust, depending on the city. The percentages of households having HDM allergen levels associated with the risk of developing allergy sensitization and asthma were 65% and 25%, respectively. Specific antigens of the storage mite and cockroach were only found in samples from the southern and tropical regions of China. Levels of mite allergens were generally higher in samples from bedding compared to samples from the living room, even for storage mites, whereas levels of cockroach antigens were higher in the living room samples. CONCLUSION: HDM allergens are present in bedding dust samples from most Chinese households. Cities in southern and central China have relatively high levels of HDM major allergens compared to cities in northern and western China. Antigens of storage mites and cockroaches are not as common as HDM allergens.
Authors: Sergei Voloshin; Olga Smoldovskaya; Guzel Feyzkhanova; Alla Arefieva; Lyudmila Pavlushkina; Tatiana Filatova; Veronika Butvilovskaya; Marina Filippova; Yuri Lysov; Sergey Shcherbo; Alexander Makarov; Alla Rubina; Alexander Zasedatelev Journal: PLoS One Date: 2018-03-22 Impact factor: 3.240