Paralytic Shellfish Poisoning
Paralytic shellfish poisoning is caused by ingesting a toxin found in mussels, oysters or clams harvested from water where the toxin is present. Onset typically begins between 30 minutes and three hours after ingesting the contaminated food. Symptoms of poisoning include tingling, numbness, paralysis, nausea and vomiting. People can reduce their risk of poisoning by only buying shellfish from reputable sources.
PHO Rounds: Respiratory Season 2026–27, Part 1: Surveillance and Testing of Respiratory Pathogens in Ontario
The first session will provide an overview of current epidemiological trends for COVID-19, influenza, and respiratory syncytial virus (RSV) activity in Ontario, Canada and internationally. The session also describes the planned approach to testing across the provincial laboratory network for respiratory viruses for the 2026–27 season.
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