E. coli and Beach Monitoring

Trisha Robinson, MPHEpidemiologist Supervisor, Waterborne Diseases Unit

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E. coli and Beaches in the News

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Poop IS no laughing matter with many metro beach closures this

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DEPARTMENTOF HEALTH

Twin Cities beach closed downafter E.coIi found in waterThe Lake Minnewashta Regional Park Beach is closed till further notice.

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Beach closed? Blame it on the rainDan Gundmon July 10, zuw 1 35 p in

Illness cases at Lake Nokomis growto 69; other Minneapolis beachesremain closedHalf of beaches in Minneapolis remain closed afteranother round of testing.

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Waterborne Diseases Unit

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Studies on

Waterborne Illness

Reportable Disease

Surveillance

Disease Outbreak

InvestigationsEducation & Outreach

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Waterborne Illnesses from Lakes

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Diarrheal illnessesCryptosporidium, Giardia,

E. coli O157, Shigella, Norovirus

Brain infectionsNaegleria fowleri

(brain-eating amoeba)

Multiple symptomsHarmful algal blooms

Ear infectionsSwimmer’s ear

Skin infectionsSwimmer’s itch

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How Are Diarrheal Illnesses Spread in Water?

▪ On average people have 0.14 grams of feces on their bottoms, which when rinsed off, can contaminate the water

▪ When someone is ill with diarrhea their stool contains millions of germs

▪ Swallowing even a small amount of contaminated water can make a person sick

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Lake Superior Beach Monitoring Program

▪ Monitor 38 public beaches along Lake Superior

▪ Only beach monitoring program conducted by the Minnesota Department of Health

▪ Conducted as part of the National BEACH Act

▪ Federally funded

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Beach Monitoring in Minnesota

▪ Beach monitoring is at the discretion of the entity responsible for the beach

▪ City, county, park district

▪ Frequency of monitoring and criteria used for an advisory

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Beach Monitoring

▪ Goal is to help determine if beach water is safe for recreational activities and minimize the risk of people getting sick

▪ Small water sample collected at the beach

▪ Results available next day

▪ Advisory issued and beach closed if E. coli levels are too high

▪ Beach will reopen when E. coli levels are acceptable

8DEPARTMENTOF HEALTH

E. coli in Water

▪ Sign there could be fecal contamination in the water that could make people sick

▪ Humans or animals

▪ Hundreds of kinds of E. coli can be found in lakes that do not make people sick

▪ High levels of E. coli indicate the germs that make people sick might be in the water

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2019 Lake Outbreaks

Lake Nokomis

▪ Pathogenic E. coli

▪ 69 people sick

▪ 1 in 4 people reported continuing to swim while sick with diarrhea

Lake Minnetonka

▪ 198 people sick

▪ Viral illness

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Education and Outreach

▪ Provide education and outreach to all swimmers

▪ How they can stay healthy at the beach

▪ How they can help keep the beach healthy for everyone

▪ Put out messages to the public

▪ Website

▪ Social media

▪ Media and local partners

11DEPARTMENTOF HEALTH

Staying Healthy at the Beach and Lake: Minimize the Risk of Illness

▪ Don’t swallow the water

▪ Shower after swimming

▪ Avoid swimming after a rain event

▪ Avoid swimming at beaches where you can see discharge pipes

▪ Avoid swimming if you see a blue-green algal bloom

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Staying Healthy at the Beach and Lake: Help Keep the Water Healthy for Everyone

▪ Stay out of the water if you have diarrhea

▪ Shower before swimming

▪ Take frequent bathroom breaks

▪ Change diapers frequently and away from the water

▪ Dispose of trash properly

▪ Maintain septic systems

▪ Don’t encourage waterfowl by feeding ducks, geese, or other birds

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Gaps and Opportunities

▪ Changing climate conditions

▪ Naegleria fowleri (brain-eating amoeba)

▪ Harmful algal blooms

▪ No centralized location for beach monitoring results

▪ No centralized location for alerts in place at a beach

▪ No system for evaluating monitoring results to determine best practices

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Thank You!

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