Death Cap Mushrooms Linked to Three Deaths, Three Liver Transplants, and 35 Hospitalizations

January 15, 2026

What You Need to Know:


  • The California Department of Public Health (CDPH) is issuing an update to its December 5 health advisory as an outbreak of amatoxin poisoning continues across California.
  • This outbreak is linked to the consumption of wild foraged mushrooms and has caused severe liver damage in children and adults.
  • As of January 6, 35 cases, including three adult fatalities and three liver transplants, have been linked to the ongoing outbreak.
  • Recent rain contributed to widespread growth of Death Cap mushrooms in California. CDPH is again urging Californians not to pick or eat wild mushrooms as the risk of potentially deadly amatoxin poisoning is high.
  • Since Death Cap mushrooms are easily confused for safe-to-eat, lookalike mushrooms, all mushroom foraging should be avoided.



Between November 18 and January 6, the California Poison Control System (CPCS) has identified 35 hospitalized cases across Northern California and the Central Coast, spanning regions from Sonoma to San Luis Obispo. Affected individuals range in age from 19 months to 67 years and include family groups and individual cases. Medical treatment for amatoxin poisoning has been provided in the following counties: Alameda, Contra Costa, Monterey, San Francisco, San Luis Obispo, San Mateo, Santa Clara, Santa Cruz and Sonoma. Most cases are in the Monterey and San Francisco Bay Area, though Death Cap mushrooms can be found across the state, particularly adjacent to oaks, other hardwoods and some pines.


Information provided by some affected individuals indicates that Death Cap mushrooms were collected from various locations across Northern California and the Central Coast regions, including, county, city and national park lands.



Provider Recommendations and Resources

Health care providers should be aware of the potential for multiphase toxicity following wild mushroom ingestion. Gastrointestinal symptoms mimicking viral gastroenteritis can occur within 6 to 24 hours and typically resolve within 24 hours. This improvement can create a false impression of recovery as patients may still progress to potentially fatal hepatotoxicity within 48 to 96 hours after ingestion. Contact California Poison Control System at 1-800-222-1222 for guidance on diagnosing and treating patients with suspected mushroom poisoning.



Additional Resources


For questions or concerns, please contact the Communicable Disease Control Division at 714-834-8180.

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