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Bow Mosquito Batch Tests Positive For Jamestown Canyon Virus

Centers for Disease Control
A batch of mosquitoes collected in Salem is the first in New Hampshire to test positive for West Nile virus this year.

The New Hampshire Department of Health and Human Services says a mosquito batch in Bow has tested positive for the Jamestown Canyon virus, the first time it has been detected in mosquitoes in the state.

Humans have been previously diagnosed with the virus, which is transmitted by the bite of an infected mosquito.

Testing mosquitoes has not been part of the routine surveillance, but the state started a pilot project this summer to estimate its prevalence in disease-carrying species in central New Hampshire.

Since the first report of the disease in New Hampshire in 2013, the state has identified 14 human cases of JCV.

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