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A study of persons with laboratory-confirmed sporadic Campylobacter jejuni infection and of controls matched for age and sex in Colorado in the summer of 1981 yielded odds ratio estimates significantly greater than 1 for the following risk factors: drinking raw water (10.74), drinking raw milk (6.93), eating undercooked chicken (2.77), and living in a household with a cat (3.21).
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Hopkins et al. (1984) studied this question.
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