"fungal glucans" and "bacterial endotoxins"

No, really, they're a good thing!

From BabyCenter.com:

A bit of a dust and dirt in the house may be a good thing for your children, suggests a University of Cincinnati study in the May issue of the journal Allergy...Children exposed to high levels of "fungal glucans" and "bacterial endotoxins" were about three times less likely to wheeze than those in more sanitized settings..."If you keep your house too clean, you don't provide the microbial components to stimulate the immune system," said study lead author Yulia Iossifova.

Finally, one less thing to feel guilty about!