Pet allergen levels are reported to stay in the home for several months after the pet is removed even with cleaning. Isolation methods to reduce animal allergen in the home have also been suggested by reputable health authorities (e.g., keeping the animal in only one area of the home, keeping the animal outside or ensuring that people with allergies or asthma stay away from the animal) but the effectiveness of these methods has not been determined. Several reports in the literature indicate that animal allergen is carried in the air and by residents of the home on their clothing to all parts of the home, even when the animal is isolated. In fact, animal allergen is often detected in locations where no animals were housed.

Often, people sensitive to animal allergens are advised to wash their pets regularly. Recent research indicates that washing pets may only provide temporary reductions in allergen levels. There is no evidence that this short term reduction is effective in reducing symptoms and it has been suggested that during the washing of the animal the sensitive individual may be initially exposed to higher levels of allergens.

Thus, the most effective method to control exposure to animal allergens is to keep your home pet free. However, some individuals may find isolation measures to be sufficiently effective. Isolation measures that have been suggested include keeping pets out of the sleeping areas, keeping pets away from upholstered furniture, carpets, and stuffed toys, keeping the pet outdoors as much as possible and isolating sensitive individuals from the pet as much as possible.

Actions You Can Take

• If pets are one of your asthma triggers, strongly consider finding a new home for your pets.
   
• Keep pets out of the bedroom and other sleeping areas at all times and keep the door closed.
   
• Keep pets away from fabric-covered furniture, carpets and stuffed toys.
  Vacuum carpets, rugs and furniture two or more times per week.
  Additional Resources
   

Indoor Air Quality Publications - www.epa.gov/iaq/pubs
Biological Pollutants - www.epa.gov/iaq/biologic.html