According to the European Food Safety Authority (EFSA), the highest frequency of Listeria-tainted products are found in RTE fish, cheese and meat products because they no longer “undergo any treatment” before consumption - such as reduction before cooking," added the Commission official.
She added: "Cheeses, meat products and sandwiches were most often identified food vehicles in food-borne listeriosis. Microbiological risk assessment studies have also shown a relatively high risk for listeriosis caused by consumption of smoked fish."
CFA secretary general Goodburn said she believed the longer shelf lives allowed in some countries for RTE meat, fish and cheese products was also a factor.
“The shelf life of smoked salmon in the UK is usually around three weeks, whereas many other European counties allow it to remain on shop shelves for up to six weeks,” she explained.
“If you give certain foods such as RTE fish, meat and cheeses that have a potential Listeria presence an excessively long shelf life, then it gives the bacteria longer to grow.”
The Commission confirmed the survey will be carried out next year with the findings from individual countries due to be reported by the end of May 2011. The final report is scheduled for release by the end of 2011.
As human exposure to Listeria is food borne, the study will look at packaged (not frozen) hot or cold smoked or gravad fish; soft or semi-soft cheeses, excluding fresh cheeses and packaged heat treated meat products in a harmonised way across Europe.