Common wisdom has it that dust is bad for health but a recent study suggests that bacterial endotoxins found in dust and other substances may actually help to prevent children from developing allergies and asthma. Endotoxins are commonly found in the feces of larger animals, household pets, dust, and dirt. The study, which was conducted in rural Germany, Austria and Switzerland, was led by Dr. Charlotte Braun-Fahrlander, Institute of Social and Preventive Medicine in Basel, Switzerland.
(Source: Alternative & Complementary Therapies, Vol. 8, No. 6, December 2002)