Fel d 1 and Can f 1 in settled dust and airborne Fel d 1 in allergen avoidance day-care centres for atopic children in relation to number of pet-owners, ventilation and general cleaning.

Cat and dog allergens in settled dust and airborne cat allergen were studied in day-care centres, with links explored between pet ownership among children and staff, ventilation and cleaning. The special centres were allergen-avoidance day care units. Control was performed by 22 conventional day care centres. Allergen levels were measured using ELISA and personal air samplers, and air change rate per hour was noted. A questionnaire was distributed for the other data. No cats or dogs were kept by children at the allergen avoidance centres in contrast to the control.