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A critical new warning from Europe’s top health agencies reveals a dangerous upward trend in severe Listeria monocytogenes infections, cementing its position as the continent’s most lethal foodborne threat. The latest EU One Health Zoonoses Report (2024), published by the European Food Safety Authority (EFSA) and the European Centre for Disease Prevention and Control (ECDC), confirms that while listeriosis remains relatively rare, its severity is unmatched.

In 2024 alone, the EU recorded over 3,000 confirmed invasive human cases, with approximately 70% of victims requiring hospital care and a staggering one in twelve infected individuals dying—the highest fatality rate among all reported foodborne infections.

Experts link this rising tide primarily to Europe’s ageing demographic and evolving consumption patterns, notably the increasing reliance on Ready-to-Eat (RTE) foods. Listeria is an insidious bacterium that thrives in cold, damp conditions, making it a persistent contaminant in processed goods.

While overall contamination in RTE foods is low, the report highlighted specific high-risk vectors. Fermented sausages were the most frequently contaminated RTE product in 2024, exceeding EU safety limits in 3.0% of samples. Furthermore, prolonged, multi-country outbreaks have repeatedly been traced back to products like smoked fish and other chilled meat preparations.

In response to this persistent threat, the European Commission is tightening food safety regulations, with stricter requirements on RTE food producers expected to take effect by 2026, aiming for a near zero-tolerance policy for the pathogen.

A Broader Food Safety Challenge

The report also pointed to systemic failures in controlling other common pathogens. While Listeria poses the deadliest risk, Campylobacter and Salmonella remain the most frequently reported zoonoses. Disturbingly, a significant number of EU countries failed to meet established targets for reducing Salmonella in poultry flocks, emphasizing the need for stronger, coordinated action across the entire food chain—in line with the 'One Health' approach.

To mitigate personal risk, authorities urge strict adherence to food hygiene. Vulnerable groups—including the elderly, pregnant women, and the immunocompromised—should strictly avoid high-risk foods such as unpasteurised milk, soft cheeses made from it, and high-risk RTE meat or fish products. Simple preventative steps like keeping the refrigerator temperature at 5°C or below, ensuring thorough cooking of meat, and rigorously separating raw and cooked foods remain critical defenses against this silent, yet serious, public health crisis.