Bad Water at State Park claims victims in 20 counties, page 1

It's a very common parasite found in pools because it can survive in chlorinated water for days. If you think about it too much you will never get in a pool again because it comes out of the butt of an infected human. From what I gathered from the article this was the Sprayground, a play area for young kids.
YUCK!!!! Baby Poo.......

I'll take a quick look on the CDC and see if they have a write-up on cryptosporidium.

Here is a quote from their web-site, it's perfect:

How is cryptosporidiosis spread?

Cryptosporidium lives in the intestine of infected humans or animals. Millions of crypto germs can be released in a bowel movement from an infected human or animal. Consequently, Cryptosporidium is found in soil, food, water, or surfaces that have been contaminated with infected human or animal feces. If a person swallows the parasite they become infected. You cannot become infected through contact with blood. The parasite can be spread by

* Accidentally putting something into your mouth or swallowing something that has come into contact with feces of a person or animal infected with Cryptosporidium.
* Swallowing recreational water contaminated with Cryptosporidium (Recreational water includes water in swimming pools, hot tubs, jacuzzis, fountains, lakes, rivers, springs, ponds, or streams that can be contaminated with sewage or feces from humans or animals.) Note: Cryptosporidium can survive for days in swimming pools with adequate chlorine levels.

The above came from:
www.cdc.gov...

It's worth reading if you are a fan of recreational water sports that include pools where a lot of people play in the same water that just gets chlorinated, filtered and pumped back to the pool.