Second human West Nile virus case of 2006 confirmed in Pinal County

Pinal County health officials announced today that an adult man in eastern Pinal County is the second reported human case of West Nile virus (WNV) and the first death associated with WNV disease in the County for 2006.

Public Health officials are continuing to investigate the case and want to remind people that WNV activity peaks in August and September but can continue for as long as there are warm temperatures and moist air.

So far this year, no bird or horse cases have been reported in Pinal County but fifteen mosquito samples collected by the Pinal County Division of Environmental Health (PCDEH) have tested positive for the virus. PCDEH is continuing their monitoring and surveillance activities.

WNV is transmitted to humans and animals through the bite of a mosquito. Mosquitoes become infected with the virus when they feed on infected birds. The overall risk of WNV to humans is low and the majority of people infected will not experience any clinical symptoms. A small percentage of people may experience more serious forms of illnesses that can include lasting or permanent neurological effects. People over the age of 50 are more likely to develop serious symptoms of WNV if they do get sick and should take special care to avoid mosquito bites.

To help avoid getting West Nile virus infection, health officials recommend the following:

* Eliminate standing water where mosquitoes can lay their eggs
* Change water in flower vases, birdbaths, planters and animal watering pans
at least twice a week
* Repair leaky pipes and outside faucets, and move air conditioner drain
hoses frequently
* Use insect repellent on exposed skin when you go outdoors. Use an
EPA-registered insect repellent such as those with DEET, picaridin or oil of
lemon eucalyptus. Follow the directions on the container.
* When weather permits, wear long-sleeves, long pants and socks when
outdoors
* Take extra care to use repellent and protective clothing during evening
and early morning — or consider avoiding outdoor activities during these
times. The hours from dusk to dawn are peak biting times for many species
of mosquitoes.
* Repair or install screens on your home.
* Report dead birds to local Environmental Health Authorities. Dead birds
may be a sign that West Nile virus is circulating between birds and the
mosquitoes in an area.

Horses are also susceptible to WNV. Horse owners are encouraged to talk with their veterinarians regarding the WNV vaccine for horses.

For health information about WNV, call the Pinal County Division of Public Health hotline at (866) 763-7252. You may also visit the Arizona Department of Health Services’ web site at www.westnileaz.com or call the State Public Health Hotline at (602) 364-4500 or statewide toll-free at (800) 314-9243.

If you would like information concerning WNV, including locations for mosquito fogging in Pinal County, please call the mosquito hotline at (520) 866-6200 or (866) 287-0209 ext. 6200.

For more information about mosquito-borne viruses and dead bird reporting call the Pinal County Division of Environmental Health at (800) 231-8499 ext. 6807 or (520) 866-6807.