Health officials report that a third person has died in California from poisoning due to wild, foraged mushrooms. Since November, 35 people across the state have been poisoned after consuming wild mushrooms, leading to three deaths and three liver transplants.

The most recent death was reported last week in Sonoma County. According to Sonoma County's interim health officer, Michael Stacey, the poisonings and deaths are due to a surge in the prevalence of death cap mushrooms (Amanita phalloides). Stacey noted that California typically sees fewer than five mushroom poisoning cases in an average year.

Early rains and a mild fall season in Northern California have contributed to the proliferation of the toxic death cap mushrooms, Stacey said in an announcement. Health officials warn against eating wild mushrooms gathered without expert identification, as harmful varieties can closely resemble edible mushrooms, even to experienced foragers.

Craig Smollin, medical director for the San Francisco division of the California Poison Control System, stated in an interview with Ars Technica that identifying mushrooms can be difficult and requires specialized knowledge. He emphasized the importance of consulting with experts before consuming any wild mushrooms.

The California Poison Control System provides resources and assistance for individuals who suspect they may have been poisoned by mushrooms. They advise anyone experiencing symptoms such as nausea, vomiting, stomach cramps, or diarrhea after consuming wild mushrooms to seek immediate medical attention.

Death cap mushrooms contain amatoxins, which can cause severe liver damage and death. Even a small amount of the toxin can be fatal. Treatment for amatoxin poisoning includes supportive care, such as intravenous fluids and medications to protect the liver. In severe cases, a liver transplant may be necessary.

The increase in mushroom poisonings highlights the risks associated with foraging for wild mushrooms without proper knowledge and expertise. Health officials urge the public to exercise caution and to only consume mushrooms that have been identified by a qualified expert. They also recommend purchasing mushrooms from reputable sources to ensure their safety.