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Comparative Study
Journal Article
Exposure to indoor allergens in day-care facilities: results from 2 North Carolina counties.
BACKGROUND: With 63% of US children under 5 years of age in regular child care, day-care facilities could be an important source of exposure to indoor allergens.
OBJECTIVE: This study examined levels of 7 indoor allergens in 89 day-care facilities in 2 North Carolina counties.
METHODS: At each facility, a questionnaire was administered, observations were made, and vacuumed dust samples were collected from carpeted and noncarpeted areas of one room. Allergen concentrations were measured with antibody-based ELISAs.
RESULTS: Each allergen was detected in a majority of facilities (52% to 100%). Geometric mean concentrations were 5.19 mug/g for Alternaria alternata , 2.06 mug/g for Can f 1, 1.43 microg/g for Fel d 1, 0.21 U/g for Bla g 1, 0.20 microg/g for Der p 1, 0.10 microg/g for Der f 1, and 0.01 microg/g for Mus m 1. Concentrations for 5 of the 7 allergens were not statistically different from concentrations found in southern US homes sampled in the National Survey of Lead and Allergens in Housing. In rooms with carpet and hard-surfaced flooring, levels of A alternata , Can f 1, Der f 1, Der p 1, and Fel d 1 were statistically higher on carpet.
CONCLUSIONS: In this survey of day-care facilities in North Carolina, detectable levels of indoor allergens were commonly found. For many young children and day-care staff, day-care facilities might be a source of clinically relevant exposures to indoor allergens.
OBJECTIVE: This study examined levels of 7 indoor allergens in 89 day-care facilities in 2 North Carolina counties.
METHODS: At each facility, a questionnaire was administered, observations were made, and vacuumed dust samples were collected from carpeted and noncarpeted areas of one room. Allergen concentrations were measured with antibody-based ELISAs.
RESULTS: Each allergen was detected in a majority of facilities (52% to 100%). Geometric mean concentrations were 5.19 mug/g for Alternaria alternata , 2.06 mug/g for Can f 1, 1.43 microg/g for Fel d 1, 0.21 U/g for Bla g 1, 0.20 microg/g for Der p 1, 0.10 microg/g for Der f 1, and 0.01 microg/g for Mus m 1. Concentrations for 5 of the 7 allergens were not statistically different from concentrations found in southern US homes sampled in the National Survey of Lead and Allergens in Housing. In rooms with carpet and hard-surfaced flooring, levels of A alternata , Can f 1, Der f 1, Der p 1, and Fel d 1 were statistically higher on carpet.
CONCLUSIONS: In this survey of day-care facilities in North Carolina, detectable levels of indoor allergens were commonly found. For many young children and day-care staff, day-care facilities might be a source of clinically relevant exposures to indoor allergens.
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