Organic chickens are three times more likely than conventionally-bred poultry to be contaminated with a bacterium that causes food-poisoning. A team at the Danish Veterinary Laboratory found that all 22 organic flocks they investigated were infected with Campylobacter ? one of the most common causes of food poisoning. Only one third of 79 conventional chickens were infected.

?The organic movement is sound, but this is unwelcome news,? says Karl Pedersen, who supervised the project. The result is not entirely surprising, since organic birds are allowed to roam outside and are more likely to be exposed to food and water contaminated with infected feces from wild animals. ?But it turns out that the difference was far higher than we expected,? he says.
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