A mighty creature is the germ,
Though smaller than the pachyderm,
His strange delight he often pleases,
By giving people strange diseases.
~ Ogden Nash

Did you know that there are more microorganisms in your body than there are people on Earth? We spend millions of dollars each year on anti-bacterial soaps and antibiotics to fend off germs, but, in fact, microorganisms play an essential role in human health and in the functioning of all ecosystems.

http://www.enviroliteracy.org/article.php/317.html