Organic chickens are around three times as likely to be infected with the campylobacter food poisoning bug than their broiler house counterparts, according to researchers from the Danish Veterinary Laboratory in Aarhus. In volume 33 of Letters in Applied Microbiology (p 269), the scientists reported that in their investigation, all 22 organic flocks were infected with the bacteria; while only one third of the 79 conventionally reared birds carried the bug.