CDC Links 37 Hepatitis A Cases to Ecuadorian Frozen Clams

Key points

• 37 cases confirmed in Massachusetts, Minnesota, New York, and Pennsylvania.
• 30 patients were hospitalized; no deaths have been reported.
• The source is La Serranita brand concha negra (black shell) meat from Ecuador.
• Illness onset dates range from July 30, 2025, to June 23, 2026.
• 77% of interviewed patients reported eating ceviche; 47% ate raw black clams.

Background

This outbreak follows a series of significant foodborne disease events in 2026, including a massive cyclospora outbreak linked to iceberg lettuce that sickened over 24,000 people earlier in the year. The current hepatitis A case highlights ongoing risks in the supply chain for imported shellfish, particularly when products are consumed raw or undercooked. The CDC and FDA have emphasized that freezing does not kill the hepatitis A virus, and contaminated food may not appear or smell abnormal.

How outlets are covering it

CIDRAP and Food Safety News align on the core facts, citing the CDC and FDA joint announcement. Both note the specific brand, La Serranita, and the distribution states. CIDRAP emphasizes the demographic data (ages 6-40) and the specific food items consumed, such as ceviche. Food Safety News focuses on the consumer advice, urging disposal of the recalled product and noting that the virus can be transmitted even without symptoms. Baller Alert provides minimal new detail, reiterating the 37-case count and the link to ceviche, but lacks the depth of the regulatory and epidemiological details provided by the other two sources. All sources agree on the lack of fatalities and the high hospitalization rate.

Why it matters

The outbreak underscores the persistent risk of hepatitis A in imported shellfish, particularly when consumed raw. The long timeline of illness onset, spanning nearly a year, indicates that the virus can remain undetected for extended periods. The high hospitalization rate (30 of 37 cases) suggests severe disease in this cohort, despite the absence of deaths. This event reinforces the need for robust surveillance and recall enforcement for imported food products, especially those intended for raw consumption.

What to watch

The FDA and CDC will continue to monitor for additional cases and ensure the recalled La Serranita product is removed from the market. Public health officials are likely to issue further advisories to restaurants and consumers regarding the safe handling of shellfish. No new deaths have been reported, but the investigation remains active to determine if the outbreak is fully contained.