As reported by the CDC, a test was conducted in which fecal matter was added to water to simulate a common fecal accident in a swimming pool. Results showed that levels of chlorine known to kill the parasite were no longer adequate if there was fecal matter contaminating the water, indicating that the human waste protected the parasite from chlorine inactivation.
To prevent outbreaks of the diarrhea, etc., caused by this parasite, the report recommends changes in pool engineering, such as improved filtering and more frequent turnover of the water pumped into the pool. They also suggest changes in pool's policies and urge that staff of and visitors to public pools and water parks be educated about ways to prevent waterborne disease transmission, such as:
To access the full article on-line that the CDC's report was based on, go to http://www.cdc.gov/ncidod/EID/vol5no4/carpenter.htm.