This research examines how harmful bacteria can survive and persist in food processing facilities despite regular cleaning, potentially contaminating food products over long periods. The study identifies the most problematic bacteria, where they tend to hide in facilities, and how to better detect and control them. Key impacts on everyday life: – Helps make food safer by improving detection and control of persistent bacteria in food processing facilities – Provides guidance for food companies to better design and maintain their facilities to prevent bacterial contamination – Supports development of more effective cleaning and monitoring programs in food processing – Helps prevent foodborne illness outbreaks linked to persistent contamination in food facilities – Contributes to maintaining the safety and quality of processed foods that people consume daily