title: Seasonal variation of skin reactivity and specific IgE antibody to house dust mite.
abstract: BACKGROUND
  House dust mite is an important cause of bronchial asthma worldwide. While the allergen is present all year-round, a seasonal variation of house dust mite allergen levels has been found. There have been few reports, however, on seasonal variation of specific immune response to house dust mite.
  
  
  OBJECTIVE
  We studied the changes in skin reactivity and specific IgE antibody to house dust mite associated with seasonal variation of house dust mite allergen levels in houses of mite-sensitive asthmatic patients.
  
  
  METHODS
  In 14 mite-sensitive asthmatic patients, house dust mite allergen (Der f 1) contents in bedding were measured monthly. Skin reactivity on prick test and specific IgE antibody to house dust mite, Dermatophagoides farinae (D. farinae), were determined every 3 months from july to December.
  
  
  RESULTS
  The concentration of Der f 1 in dust from bedding reached maximum levels in August and September, and significantly decreased in November and December compared with August and September (P < .05). Skin reactivity (a ratio of mean wheal diameter of allergen to histamine) to D. farinae decreased significantly in December compared with September (P < .05). Serum levels of total IgE and specific IgE antibody to D. farinae decreased significantly in December compared with September (P < .05).
  
  
  CONCLUSIONS
  These findings suggest that seasonal changes in natural exposure to house dust mite allergen might lead to concurrent changes in skin reactivity and specific IgE antibody to house dust mite in mite-sensitive asthmatic patients.
authors.affiliation: Department of Allergy and Clinical Immunology, Ajou University School of Medicine, Suwon, Korea.
authors.forename: D H
authors.initials: DH
authors.lastname: Nahm
authors.forename: H S
authors.initials: HS
authors.lastname: Park
authors.forename: S S
authors.initials: SS
authors.lastname: Kang
authors.forename: C S
authors.initials: CS
authors.lastname: Hong
mesh_terms: D000293:Adolescent; D000328:Adult; D000485:Allergens / Q000276:immunology; D000818:Animals; D000918:Antibody Specificity; D039741:Antigens, Dermatophagoides; D001249:Asthma / Q000276:immunology; D005260:Female; D006023:Glycoproteins / Q000276:immunology*; D006801:Humans; D007073:Immunoglobulin E / Q000097:blood / Q000276:immunology*; D008297:Male; D008925:Mites / Q000276:immunology; D012621:Seasons; D012867:Skin / Q000276:immunology*; D012882:Skin Tests
chemical_list: D000485:Allergens; D039741:Antigens, Dermatophagoides; D006023:Glycoproteins; D007073:Immunoglobulin E