UIC Researchers Measure Health Effects of Chicago's Waterways March 23, 2009
|Sherri McGinnis Gonzálezemail@example.com|
The Chicago Health, Environmental Exposure, and Recreation Study, or CHEERS, is funded by the Metropolitan Water Reclamation District of Greater Chicago.
The project aims to determine the rate of illness for people who participate in water activities other than swimming and establish water quality standards for people who enjoy activities on the waterway.
Local and federal regulations have been developed to protect people who swim at beaches, but water quality standards do not exist to protect people who row, paddle, boat or fish. This is the first study in the U.S. to evaluate health and environmental factors associated with recreation on water.
The researchers are enrolling people who participate in activities on Chicago area waterways and will follow them over time to see if they get sick, according to Dr. Samuel Dorevitch, research assistant professor of environmental and occupational health sciences at UIC and principal investigator of the study.
"We also have a comparison group of people who are outdoors on the same days at about the same places doing recreational activity that doesn't involve water," Dorevitch said. By comparing the two, the researchers hope to uncover any short-term health effects of water recreation, such as gastrointestinal infections, skin infections, or eye, ear or respiratory conditions.
Participants will be surveyed before and after activities on the water. The amount of water swallowed, inhaled, or splashed on skin will also be measured in some people. Two of the novel ways for measuring water exposure were developed at UIC.
Aerosol samplers will be used to measure the amount of water that people may be inhaling during water sports. Sponges clipped to the shirts of subjects will show how much water the skin is exposed to, Dorevitch said. Amounts of water ingested during recreational activity will be measured at several local swimming pools.
Study participants will then receive phone calls over three weeks following exposure to see if they have developed any symptoms or infections.
A unique aspect of the study is that the researchers will measure the actual pathogens in the water that cause disease, Dorevitch said. Most prior research has looked at indicators of sewage pollution in the water, like E. coli bacteria.
"It's not usually E. coli that makes people sick," Dorevitch said. "But the presence of E. coli in the water indicates that there may be sewage contamination."
The new study, he said, will measure not only E. coli, but also such pathogens as giardia, cryptosporidium and norovirus "that actually do make people sick."
CHEERS canvassers will recruit participants who use the Chicago River system, including the Cal-Sag Channel and the North Branch and North Shore Channel of the Chicago River system which has three water reclamation plants that discharge treated waste water into the channels.
Other recruitment sites include the Fox River, the Des Plaines River and several small inland lakes such as Tampier Lake, Busse Woods Lake, Skokie Lagoons and Crystal Lake.
CHEERS participants receive a t-shirt, a $15 gift card after completing the preliminary questions, and a $35 check after the follow-up questions.
Researchers expect to enroll 10,000 subjects in the study by August.
The project was originally funded by a $3.75 million contract in 2007. Recent supplemental funding of $4.3 million allows for additional locations, recruitment, and measurements.
For information about the study and a list of upcoming events, visit www.cheerschicago.org/.
For more information about UIC, visit www.uic.edu
[Editors note: An extended interview with Dr. Dorevitch is available as an MP3 audio file at https://blackboard.uic.edu/bbcswebdav/institution/web/news/podcasts/PdCst57-Mar19%2709-Dorevitch.mp3]