NH DHHS Announces First Human Case of EEE This Season

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

(DHHS) is announcing the first human case of Eastern Equine Encephalitis

(EEE) this season in an adult from Conway. The most recent previous human

case of EEE in New Hampshire was confirmed in 2009. Also four additional

mosquito batches were found to be positive in New Hampshire today; two in

Derry and two in Candia. Three of these batches were bird biting mosquitoes

indicating an increase in EEE activity in the bird population. One of the

batches was a mammal biting species which increases the risk of additional

human or veterinary cases of EEE. This brings the total of EEE mosquito

batches identified this season to five. There have been no West Nile Virus

positives yet this year.

In 2013, there were 27 positives for EEE, including 24 mosquito batches and

3 animals. EEE and WNV are transmitted by the bite of infected mosquitos.

This human finding will change the arboviral risk map for Conway to high

and the surrounding municipalities of Chatham, Bartlett, Hales Location,

Albany, Madison, and Eaton to moderate. The risk level in Derry will remain

at moderate. The risk level for Candia will increase to moderate.

“This positive is at about the same time as the previous EEE patient

identified in 2009,” said NH Public Health Director Dr. José Montero.

“There is no way to know where exactly this individual was infected, but we

do know that both of these diseases are present in New Hampshire so it is

important that everyone remember to take steps to prevent mosquito bites to

themselves and their loved ones.”

Symptoms of EEE 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. EEE is a more serious

disease than WNV and carries a high mortality rate for those who contract

the serious encephalitis form of the illness. Symptoms may include high

fever, severe headache, stiff neck, and sore throat. There is no specific

treatment for the disease, which can lead to seizures and coma.

You can protect yourself and your family from WNV and EEE with a few simple

steps, such as using effective mosquito repellant, wearing long sleeves and

pants at dawn and dusk when mosquitoes are most active, removing standing

water from around your house so mosquitoes do not have a place to breed,

and by checking doors and windows to ensure screens are in place and in

good condition to prevent mosquitoes from entering your home.

For more information about EEE and West Nile Virus visit the DHHS website

at http://www.dhhs.nh.gov/dphs/cdcs/arboviral/index.htm and the Centers for

Disease Control and Prevention website at www.cdc.gov . For questions

contact the DHHS Bureau of Infectious Disease Control at 603-271-4496.

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Prevention Guidelines for West Nile Virus and

Eastern Equine Encephalitis Virus

NH Department of Health and Human Services, Division of Public Health


1. Eliminate standing water and other mosquito breeding locations.

In warm weather, mosquitoes can breed in any puddle that lasts more than 4


· Remove old tires from your property.

· Dispose of tin cans, plastic containers, ceramic pots, or other

containers. Don’t overlook containers that have become overgrown

by aquatic vegetation.

· Drill holes in the bottom of recycling containers that are left


· Make sure roof gutters are clean and draining properly.

· Clean and chlorinate swimming pools and hot tubs. If not in use,

keep empty and covered and keep covers free of standing water.

· Aerate garden ponds or stock them with fish.

· Turn over wheelbarrows and change water in birdbaths at least

twice weekly.

· Turn over plastic wading pools when not in use.

· Remind or help neighbors to eliminate breeding sites on their


2. Be aware of where mosquitoes live and breed and keep them from entering

your home.

· Mosquitoes lay their eggs in standing water. Weeds, tall grass, and

bushes provide an outdoor home for adult mosquitoes, including

several species commonly associated with West Nile Virus and Eastern

Equine Encephalitis Virus.

· Mosquitoes can enter homes through unscreened windows or doors, or

broken screens. Make sure that doors and windows have tight-fitting

screens. Repair or replace all screens in your home that have tears

or holes.

· Resting mosquitoes can often be flushed from indoor resting sites by

using sweeping motions under beds, behind bedside tables etc. and

once in flight, exterminated prior to sleeping at night.

3. Protect yourself from mosquito bites.

· If outside during evening, nighttime, and dawn hours when mosquitoes

are most active and likely to bite, children and adults should wear

protective clothing such as long pants, long-sleeved shirts, and


· Consider the use of an effective insect repellent, such as one

containing DEET. A repellent containing 30% or less DEET

(N,N-diethyl-methyl-meta-toluamide) for children and adults. Use DEET

according to the manufacturer's directions. Children should not apply

DEET to themselves. Repellents that contain Picaridin or oil of lemon

eucalyptus have also been determined to be effective.

· Vitamin B, ultrasonic devices, incense, and bug zappers have not been

shown to be effective in preventing mosquito bites.

For more information on West Nile Virus or Eastern Equine Encephalitis

Virus, call the NH Department of Health and Human Services toll-free West

Nile Virus Information Line at

866–273–NILE (6543), or visit the West Nile Virus Website at

www.dhhs.nh.gov .