Scott County health officials said Wednesday some chickens that serve as an early-warning detection system for mosquito-borne diseases have tested positive for the West Nile virus. State health officials have confirmed 10 human cases of the illness, and several additional cases are being investigated. Polly Carver-Kimm of the Iowa Department of Health said it's the prime time for human cases to occur. In 2011, there were nine human cases in Iowa, and two deaths resulted from the disease.
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