When my husband drops a piece of food on the floor, he quickly picks it up and eats it, claiming that if it's not on the floor for more than five seconds, it's just fine.  I think he's asking for trouble.  What do you think?
D005516:Food Microbiology; D005517:Foodborne Diseases / Q000209:etiology* / Q000382:microbiology / Q000517:prevention & control; D006801:Humans; D013997:Time Factors