Since 1 July 2026, stricter requirements regarding Listeria monocytogenes in certain ready-to-eat foods have applied in the EU. Switzerland has also incorporated the corresponding regulation into the Swiss Hygiene Ordinance (HyV; SR 817.024.1). This issue is also relevant for restaurants, hotels, caterers, and institutional food service operations—especially when ready-to-eat meals are purchased, prepared, stored under…