Observation of Food Handlers' Hand Hygiene Behavior During Production at a Sandwich-making Factory

Area of Science:

• Food Safety
• Microbiology
• Occupational Health

Background:

• Effective hand hygiene is crucial in food production to prevent microbiological contamination and foodborne illnesses.
• Self-reported hand hygiene data is unreliable due to biases; observational methods provide more accurate behavioral assessments.
• Covert observation using closed-circuit television (CCTV) offers a reliable method for collecting objective data on food handler practices.

Purpose of the Study:

• To assess the actual hand hygiene compliance of food handlers in a ready-to-eat (RTE) sandwich production facility.
• To identify specific deficiencies in hand hygiene practices using covert CCTV observation.
• To provide data-driven insights for developing targeted interventions to improve food safety.

Main Methods:

• Covert observation of 12 food handlers over 16 hours using CCTV footage in a sandwich-making facility.
• Utilized an electronic checklist based on the company's hand hygiene protocol to record observed practices.
• Analyzed 588 instances requiring hand hygiene and 401 attempts at hand hygiene.

Main Results:

• Food handlers failed to wash hands on 32% of occasions requiring hygiene.
• Only 1% of observed hand hygiene attempts were fully compliant with the protocol.
• Significant non-compliance noted: 95% lacked adequate handwashing duration, 4% omitted soap, 16% didn't wet hands first, and 62% skipped hand sanitizer post-wash.

Conclusions:

• Current hand hygiene compliance among food handlers in RTE sandwich production is critically low.
• Specific procedural failures, including duration, soap usage, and sanitizer application, require immediate attention.
• Targeted interventions and training are essential to enhance food handler hand hygiene and ensure safer food production.