Shellfish Safety Warning in California: Protect Yourself from Paralytic Shellfish Poisoning and Domoic Acid Toxins

The California Department of Public Health has issued an annual shellfish safety warning which will be in effect from May 1. This warning applies to sport-harvested mussels along the California coast and will last at least until October 31. The purpose of this warning is to protect the public from poisoning that can result in serious illness. It is advised that consumers refrain from consuming sport-harvested mussels during this time period.

The annual warning does not apply to commercially harvested shellfish that are sold in restaurants or fish markets. This is because commercial harvesters in California are certified by the CDPH and are subject to strict testing requirements to ensure the shellfish are free of toxins. The warning aims to prevent paralytic shellfish poisoning (PSP) and domoic acid poisoning, which are caused by naturally occurring toxins in shellfish.

Symptoms of PSP can include tingling of the lips and tongue, loss of balance, lack of coordination, slurred speech, and difficulty swallowing. In severe cases, symptoms can escalate to trouble breathing, confusion, and disorientation. If someone experiences these symptoms after consuming shellfish, it is important to seek medical attention immediately. To reduce health risks, it is recommended that individuals avoid eating recreationally harvested mussels during the summer months from May 1 onwards.

For further information about the quarantine, PSP, and domoic acid, individuals can visit the CDPH Annual Mussel Quarantine – Frequently Asked Questions (FAQ) webpage. Updated information on quarantines and shellfish toxins can also be obtained by calling the CDPH Biotoxin Information Line at (800) 553-4133.