It seems that 70% of all the chickens we buy at supermarkets are infected to some degree with this bug that causes food poisoning.
ASDA has come out the worst for contamination at the highest risk level with 28% of chickens affected
Marks & Spencer is next worst at the high level with 22% followed by Morrisons at 21%.
Tesco came out much better at 11%.
All the supermarkets had between approximately 2/3 and 3/4 of their chickens contaminated at all risk levels and no retailer has yet achieved the 10% maximum target for the highest risk level which they agreed to do in 2010 by the end of next year.
Campylobacter is the biggest cause of food poisoning in the UK, responsible for 280,000 cases a year, and around 100 deaths but is easily killed by thorough cooking.
The Food Standards Agency (FSA) has issued advice on how to store and cook chickens.
See also earlier post on this topic