In asthma, it appears to be airborne allergens like dust mites and cat dander.

"Dogs, cat dander, sometimes hay fever but I don't know what that consisted of exactly."

Various attempts to modify aberrant immune responses to specific allergens, such as those to cat dander, have been made.

Allergic reactions to cat dander and/or cat saliva are common.

For those sensitized to cat dander, that could mean a red-alert day and extra medication.

Mr. Clinton is allergic to cat dander.

They don't only have him just with the cat dander, but forensics has found Breen's fingerprints in a firefighter's glove.

The purported toxin lorises introduce is similar to the allergen in cat dander, hence it seems most plausible that the secretions merely elicit an allergic reaction, not toxicosis.

They recently showed they actually raise personal exposure to cat dander.

When people who have allergies encounter an allergen, their immune system produces antibodies, called IgE antibodies, that are specific to that substance-ragweed, for instance, or cat dander.