Allowed in Your Food:

"Among the booklet’s list of allowable defects are “insect filth,” “rodent filth” (both hair and excreta pellets), “mold,” “insects,” “mammalian excreta,” “rot,” “insects and larvae” (which is to say, maggots), “insects and mites,” “insects and insect eggs,” “drosophila fly,” “sand and grit,” “parasites,” “mildew” and “foreign matter” (which includes “objectionable” items like “sticks, stones, burlap bagging, cigarette butts, etc.”)...

...In case you’re curious: you’re probably ingesting one to two pounds of flies, maggots and mites each year without knowing it, a quantity of insects that clearly does not cut the mustard, even as insects may well be in the mustard. "

Curious? Read more here.