Beach danger? new study tracks illness from toxic algae

NCT ID NCT06579170

Ongoing Knowledge-focused Sponsor: Toronto Metropolitan University Source: ClinicalTrials.gov ↗

First seen Jun 26, 2026 · Last updated Jun 26, 2026

Summary

This study follows 2,500 people who visit freshwater beaches in Ontario, Manitoba, and Nova Scotia to see if contact with water containing blue-green algae (cyanobacteria) leads to stomach bugs, respiratory issues, or skin/eye infections. Researchers will also track illness in pet dogs. The goal is to understand the real-world health risks from these increasingly common algal blooms.

What this could mean

Our plain-language read of the trial. This is informational only — not medical advice or a prediction.

What this could lead to: If successful, this could provide the first solid data on how often blue-green algae at beaches makes people sick, helping guide public health warnings.
What could go wrong: This is an observational study, not a treatment trial. It only measures illness rates and cannot prove cause and effect. Results may vary by beach and year.

This is an AI summary of the original study and may miss details. Read our disclaimer.

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Conditions

The condition(s) this trial relates to.

cellulitis digestive system disorder eye infectious disorder gastroenteritis respiratory tract infectious disorder skin infection

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

BLUE GREEN ALGAE POISONING EYE INFECTIONS GASTROENTERITIS GASTROINTESTINAL DISEASES RESPIRATORY TRACT INFECTIONS SKIN INFECTIONS

Contacts and locations

Locations

Colchester Beach

Windsor, Ontario, N0R 1G0, Canada
Grand Beach

Winnipeg, Manitoba, R0E 0T0, Canada
Kinsmen beach

Port Perry, Ontario, L9L 1R2, Canada
Shubenacadie Canal

Halifax, Nova Scotia, B2X 2W5, Canada

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