Mouse allergen exposure, wheeze and atopy in the first seven years of life.
BACKGROUND
Little is known about mouse allergen exposure in home environments and the development of wheezing, asthma and atopy in childhood.


OBJECTIVE
To examine the relation between mouse allergen exposure and wheezing, atopy, and asthma in the first 7 years of life.


METHODS
Prospective study of 498 children with parental history of allergy or asthma followed from birth to age 7 years, with longitudinal questionnaire ascertainment of reported mouse exposure and dust sample mouse urinary protein allergen levels measured at age 2-3 months.


RESULTS
Parental report of mouse exposure in the first year of life was associated with increased risk of transient wheeze and wheezing in early life. Current report of mouse exposure was also significantly associated with current wheeze throughout the first 7 years of life in the longitudinal analysis (P = 0.03 for overall relation of current mouse to current wheeze). However, early life mouse exposure did not predict asthma, eczema or allergic rhinitis at age 7 years. Exposure to detectable levels of mouse urinary protein in house dust samples collected at age 2-3 months was associated with a twofold increase in the odds of atopy (sensitization to >=1 allergen) at school age (95% confidence interval for odds ratio = 1.1-3.7; P = 0.03 in a multivariate analysis.


CONCLUSIONS
Among children with parental history of asthma or allergies, current mouse exposure is associated with increased risk of wheeze during the first 7 years of life. Early mouse exposure was associated with early wheeze and atopy later in life.
Phipatanakul
W
W
Department of Pediatrics, Division of Allergy and Immunology, Children's Hospital, Harvard Medical School, Boston, MA 02115, USA.
Celedón
J C
JC
Hoffman
E B
EB
Abdulkerim
H
H
Ryan
L M
LM
Gold
D R
DR
D000328:Adult; D016902:Air Pollution, Indoor; D000485:Allergens / Q000276:immunology*; D000818:Animals; D002648:Child; D002675:Child, Preschool; D003876:Dermatitis, Atopic / Q000276:immunology*; D004391:Dust / Q000276:immunology*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007223:Infant; D008297:Male; D051379:Mice / Q000276:immunology*; D012135:Respiratory Sounds / Q000276:immunology*; D012882:Skin Tests; D011795:Surveys and Questionnaires
D000485:Allergens; D004391:Dust