–Water damage, leaking roofs, poorly maintained heating/cooling systems
–Can be encountered outdoors as well as indoors
are common causes of allergy in the inner city.They tend to occur wherever crowded
situations exist, particularly when food or garbage is left out.
are generally outdoor allergens, and can cause problems outdoors in the
Midwest and Southeast US during the summer when the weather is hot and
humid.They cause problems indoors in
situations as noted on the slide.
usually cause immediate reactions, but not usually chronic reactions (e.g.
chronic allergic nasal symptoms).