1. [Preliminary survey on concentration of indoor allergens derived from dust mites in residential homes in Shanghai].
- Author
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Mao ZH, Liu SW, Zhang FX, Zhou SJ, and He YL
- Subjects
- Allergens analysis, Animals, Antigens, Dermatophagoides blood, Antigens, Dermatophagoides immunology, Asthma blood, China, Dust analysis, Dust immunology, Electrophoresis, Polyacrylamide Gel, Enzyme-Linked Immunosorbent Assay, Housing, Humans, Immunoglobulin E blood, Immunoglobulin E immunology, Male, Rabbits, Allergens immunology, Asthma immunology, Dermatophagoides farinae immunology
- Abstract
Objective: To investigate the level of indoor dust mite allergens in residential homes in Shanghai., Methods: The allergenic proteins, Dff F3 and Der f III (well known allergen) from the whole culture extract of Dermatophagoides farinae were purified by chromatography and sedimentation techniques. Allergic activities of both proteins were identified by skin prick test and RAST. After preparation of specific IgG anti-Dff F3, anti-Der f III, and extraction of indoor allergens from 200 indoor dust samples collected from residential homes, the allergen concentration was measured by sandwich ELISA. Allergen level was expressed in geometric mean and range, the analysis of variance (ANOV) was used to determine the level of significance between groups., Results: Dff F3 and Der f III were demonstrated strongly allergic activities, which can be highly recognized with IgE from sera of the mite-allergic patients with asthma. In the sampled 200 homes, the proportion of homes with Dff F3 level of >10 microg/g was 57.0%, 29.5% for group of 2-10 microg/g, and 13.5% for group of <2 microg/g. The proportion of homes with Der f III level of >10 microg/g was 53.5%, 32.0% for group of 2-10 microg/g, 14.5% for group of <2 microg/g., Conclusion: Selected residential homes in Shanghai were found more likely to have high level of dust mite allergens. Dff F3 was identified as the stronger allergic fraction.
- Published
- 2005