The latest figures on levels of contamination in fresh, shop-bought chicken are due to be published by the Food Standards Agency today.
In February, the FSA reported that contamination of campylobacter - which causes the most common form of food poisoning in the UK - was up across the board, with every major retailer failing to meet reduction targets.
The FSA's survey has tested around 4,000 samples of whole chickens bought from UK retail outlets and smaller independent stores and butchers.
More than 80% of samples from Asda tested positive for campylobacter, while Tesco was the best performing supermarket.
A chef at Jamie Oliver's teaching school gives her top tips on cooking and preparing chicken so you stay safe and avoid food poisoning.