NH DHHS Identifies Positive WNV Mosquito Batch in Portsmouth and Raises Threat Level

Concord, NH – The New Hampshire Department of Health and Human Services

(DHHS) Division of Public Health Services (DPHS) today announces the

finding of a batch of mosquitoes positive for West Nile Virus (WNV). This

is the eighth mosquito batch positive for WNV this season and the first in

Portsmouth since 2009. This finding has caused DPHS to raise the arboviral

risk level for human illness in Portsmouth from “Remote” to “Low.”

“This is an important time to remind everyone in New Hampshire that the

mosquito and arboviral season is not over,” said Dr. José Montero, Director

of Public Health at DHHS. “This positive underscores the importance of

using precautions, especially repellent, until the season ends with a hard

frost statewide. Mosquitoes are still out, they are still biting, and they

are infected. Remember too that mosquitoes fly so no matter where you are

in New Hampshire you should prevent being bitten.”

Symptoms of the disease often appear 4 to 10 days after being bitten. If

you or someone you know is experiencing flu-like symptoms, including fever

and headache, contact your local medical provider.

The Public Health Lab has tested over 1,800 mosquito batches, 6 animals,

and 26 people so far this season. So far this year there have been seven

other mosquito batches that tested positive for WNV but no Eastern Equine

Encephalitis positives.

Considerable resources about EEE and West Nile Virus as well as a

prevention video are available on the DHHS website at www.dhhs.nh.gov.

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Prevention Guidelines for West Nile Virus and Eastern Equine Encephalitis

WNV and EEE Risk Map 9-26-11