UWIC Managing Cleaning :Validation, Monitoring and Verification of Cleaning Programmes Prof Chris Griffith Food Research and Consultancy Unit University.
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UWIC
Managing Cleaning :Validation, Managing Cleaning :Validation, Monitoring and Verification of Monitoring and Verification of
Cleaning Programmes Cleaning Programmes
Prof Chris GriffithProf Chris GriffithFood Research and Consultancy UnitFood Research and Consultancy Unit
University of Wales Institute, CardiffUniversity of Wales Institute, Cardiff
• 20 Deaths and estimated Cost of $20 m –Aug /Sept 2008• CEO said the slicing equipment at the plant will now be subject to stricter cleaning and testing , including disassembling
The CEO said the machines had been cleaned on a daily, weekly and monthly basis but it wasn’t until the machines were disassembled that they found the areawhere the bacteria had become embedded
UWIC
Surface Counts and Product Contamination!Surface Counts and Product Contamination!
“ SEM showed rods and cocci attached to handling and cleaning tools
Genetically similar strains ( 100%) were isolated from cleaning and handling tools and associated RTE
Transfer of pathogens from cleaning tools to food may hold food safety implications”
Environmental surface sampling recognised as important. One study suggests if an organism is found in the environment there is a 70% chance of it getting into the food.
IAFP Rome 2007
UWIC
In Addition to Food Safety• Pleasant and safe work environment (removes dirt and grease)• Auditor/ customer confidence (promotes favourable image)• Removes bacteria and food on which bacteria grow• Aids pest control (removes food and pests easier to see)• Enables disinfection• Increased product shelf life and equipment performance • Reduction in:
Why is swabbing always used as the reference point?
UWIC
MicrobiologyMicrobiology
• No accepted standard / optimum method
• ISO 18593
• Highly variable results
Moore G and Griffith, C.J. (2007) Problems Associated with Traditional Hygiene Swabbing: The Need forStandardisation. Journal of Applied Microbiology; 103: 1090-1103
• Assessing cleanliness valuable in Management• Cleaning validation, monitoring and verification
• Variety of test methods• Integrated Strategy: micro and non-micro• ATP valuable rapid technique• Not all Luminometers the same –proper evaluation needed