Some supermarket chickens contaminated, says consumer group

One in five supermarket chickens are contaminated, according to consumer group Which?

The study of standard, free range and organic chicken samples from nine supermarkets found 18% were contaminated with campylobacter and 17% were contaminated with listeria.

Salmonella was present in 1.5% of samples.

The Food Standards Agency says tackling the bacteria is a key priority, and that if people follow cooking guidelines they should minimise the risk of getting ill.

Richard Lloyd, executive director of Which?, told BBC Radio 5 live Morning Reports the figures were "worryingly high".

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