Toxyplamosis

A parasite and the infection it causes, carried by up to 6o,000 Americans but no symptoms unless immune system compromised. In cat shit and some raw red meats. Be careful cleaning the litter box. To especially be avoided by pregnant women as it can cause birth defects. Survives sewage treatment.

http://www.naturesearth.com/faq.html

http://www.cdc.gov/ncidod/dpd/parasites/toxoplasmosis/factsht_toxoplasmosis.htm