CDC Report Identified Marine Toxin Foodborne Outbreaks

Federal researchers found that improper fish storage and reef-based toxins caused hundreds of illness outbreaks.

Updated on Oct. 2, 2026 in Nutrition

Gouache-painted editorial illustration showing a whole fish and coral fragment on a stone surface, evoking marine-based food safety research. — A new CDC study identified marine toxins, including scombroid and ciguatoxin, as the primary drivers of hundreds of foodborne illness outbreaks analyzed between 2011 and 2023. AI Illustration. Upload story photo >

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A new CDC study analyzed 402 noninfectious foodborne outbreaks between 2011 and 2023, resulting in 1,280 illnesses and 96 hospitalizations. The report highlights that scombroid and ciguatoxin are the primary drivers of these marine-based food safety incidents nationwide.

Why it matters

Understanding the source and setting of these outbreaks helps clarify risks associated with specific fish species and preparation locations. Environmental factors like warming waters and coral reef damage may further influence the frequency of these toxin-related events.

This retrospective study examined 402 noninfectious foodborne disease outbreaks occurring from 2011 to 2023. Researchers identified scombroid toxin and ciguatoxin as the primary causes of these illnesses, which resulted in 96 hospitalizations and one death.

The players

Centers for Disease Control and Prevention

The national public health agency responsible for monitoring foodborne disease outbreaks and conducting epidemiological research.

The details

Scombroid toxin occurs when bacteria multiply on improperly stored fish, leading to a dangerous buildup of histamine. Conversely, ciguatoxin accumulates in large reef predators as algae-produced toxins move up the food chain. Conditions such as hurricane-related reef damage, coastal construction, and runoff pollution create environments where these toxin-producing algae flourish.

2011-2023: The period analyzed by the CDC study.
October 2, 2026: The publication date of the final report.

Health Landscape

This report updates the established tracking of marine toxins under the CDC's foodborne disease surveillance protocols. It highlights how these noninfectious events remain a persistent, distinct category compared to common bacterial pathogens.

The findings underscore the importance of proper temperature control for fish and awareness of regional risks in areas like Florida, Hawai'i, Puerto Rico, and Alaska. If you experience unexpected illness after consuming fish, consider discussing your symptoms and meal history with your physician.

The takeaway

Marine toxins remain a primary cause of noninfectious foodborne illness, frequently linked to tuna in restaurant settings or reef fish prepared in homes. Tracking local seafood advisories and ensuring proper cold-chain storage remain effective ways to reduce your risk.