CAT AND DOG ALLERGEN IN MATTRESSES AND TEXTILE-COVERED FLOORS OF HOMES WHICH DO OR DO NOT HAVE PETS, EITHER IN THE PAST OR CURRENTLY

The aim of this study was to measure the levels of cat and dog allerge n in homes of families that had either never kept pets or kept or had kept cats or dogs. From a small residential area outside Stockholm con sisting of 250 houses with similar exteriors 70 homes were included. D ust samples were collected from mattresses and textile-covered floors. The levels of cat and dog allergen were analysed by ELISA. Fel dl was found in mattress dust in all 70 homes, median 0.5 mu g/g [0.24-8.89 mu g/g (quartiles)] and textile-covered floors 0.7 mu g/g (0.20-2.52 m u g/g). Can f1, was found in 98% of the collected samples, mattress du st 1.89 mu g/g (0.70-9.20 mu g/g) and textile-covered floor dust 2.5 m u g/g (1.04-2.72 mu g/g). There was a positive correlation (p<0.001) b etween allergen levels in dust from mattresses and textile-covered flo ors for both Fel d1 (r=0.68) and Can f1 (r=0.78). The highest levels o f cat and dog allergen were found in homes with furred pets (p<0.001), A significant (p<0.001) difference was seen in the levels of Fel d1 a nd Can f1 between the homes of former pet-owners and homes without pet s, In summary; cat and dog allergens are present in homes regardless o f whether such animals live in the house or not. Mattresses seem to be an underestimated reservoir for pet allergens even in homes without p ets. It is important to note that the homes of former pet owners have much lower levels of allergen than current pet owners.