WHO Alerts 99 Countries to Cereulide Toxin Found in Infant Formula

A contaminated ingredient used in infant formula has triggered one of the broadest food-safety mobilizations in recent memory, with the World Health Organization formally alerting health authorities across 99 countries and territories after cereulide toxin was detected in multiple internationally distributed brands of infant nutrition products.

WHO published Disease Outbreak News item DON596 on March 13, 2026, documenting a multi-country event that has been unfolding since product recalls first began on December 10, 2025. Investigators identified arachidonic acid (ARA) oil, a fatty acid additive used as an ingredient in the implicated products, as the source of contamination. Full root-cause analysis and complete traceability of all affected batches remain under investigation.

Between January 1 and February 25, 2026, 144 suspected and confirmed cases were reported across ten countries in three WHO Regions, with investigations still ongoing. The contaminated formulae, nutritional products, and oil mixes reached 99 countries and territories spanning all six WHO Regions, making this a genuinely global supply-chain failure rather than a regional recall.

Cereulide is a heat-stable toxin produced by Bacillus cereus. It causes sudden nausea, vomiting, and stomach pain typically within 30 minutes to six hours of ingestion, a symptom window that can make attribution to a specific product difficult in clinical settings. French investigators are examining the deaths of two infants who had consumed products subject to a precautionary recall, with Reuters reporting that one of the babies had been fed Nestlé's Guigoz powdered milk. WHO and ECDC documents provided in the outbreak news item do not independently confirm those deaths, and verification from French national health authorities remains pending.

Nestlé, Danone, Lactalis Nutrition Santé, and Hochdorf all voluntarily recalled batches of infant formula as a precautionary measure. The EU's Rapid Alert System for Food and Feed listed multiple instances of cereulide detected in infant formula or possible contamination with the toxin. Countries of origin for the contaminated products include France, Switzerland, the Netherlands, Germany, Ireland, and China.

The coordination response involved multiple overlapping systems. Since January 7, 2026, when distribution beyond the European Union was confirmed, WHO's INFOSAN Secretariat began contacting INFOSAN Emergency Contact Points in affected countries and territories to notify them of recalled products exported to their markets and to support information exchange. Within the EU, the European Rapid Alert System for Food and Feed managed communications, with close coordination maintained between INFOSAN and RASFF. The ECDC, EFSA, and European Commission described their joint effort as ensuring a "coordinated and effective response to this multi-country event."

EFSA published a rapid risk assessment on cereulide in infant formula on February 1, 2026, and is now developing scientific advice on the specific contamination threshold above which infant nutrition products should be recalled. No timeline for that guidance has been announced. ECDC has urged caregivers not to give recalled products to infants or young children and advised consumers to follow guidance issued by national food safety authorities. WHO, for its part, recommended that no travel or trade restrictions be applied to the countries named in its outbreak report.

The critical unresolved question is the ARA oil supply chain: which supplier or suppliers produced the contaminated oil, which manufacturing facilities used it, and how Bacillus cereus entered that ingredient stream in the first place. Until those answers emerge, the full scope of affected lots across four major manufacturers and six countries of origin will remain incomplete.