Nevada Mosquito Samples Positive for West Nile Virus - KTVN Channel 2 - Reno Tahoe News Weather, Video -

Nevada Mosquito Samples Positive for West Nile Virus

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West Nile virus is turning up in more mosquitoes tested by the Nevada Department of Agriculture.
The animal disease laboratory on Friday reports 42 mosquito samples from seven Nevada counties have tested positive for the disease.
Positive results were found in samples taken from Carson City, Clark, Churchill, Douglas, Elko, Lyon and Washoe counties.
People bitten by infected mosquitoes can suffer flu-like symptoms. Extreme cases can lead to death.
The U.S. Centers for Disease Control and Prevention says more than 13,000 people have been seriously ill and about 1,200 have died since 1999.
So far this year seven human cases have been reported in Nevada -- six in Clark County and one in Douglas.
There is no vaccine for humans. Horse owners should update their animal's vaccinations.

Mosquito season in this area usually ends with the first killing frosts in October.
Until then, area residents are reminded to take the following precautions during summer months to prevent an increase in the mosquito population in and around their homes:
•Clear the yard area of any free-standing water that may become a mosquito breeding-ground
•Wear long sleeves and long pants in mosquito prone areas
•Use mosquito repellant and follow label precautions
•Repair any window screens that provide entry for mosquitoes
•Vaccinate horses for Western Equine Encephalitis (WEE)
•Vaccinate horses for West Nile Virus (WNV). Four effective vaccines exist for horses, but vaccine development for humans is still underway with currently no available product in sight.
•Report night-time mosquito activity to the District Health Department at 328-2434

The Dept. of Agriculture says products containing the below active ingredients typically provide reasonably long-lasting protection:

• DEET (Chemical Name: N,N-diethyl-m-toluamide or N,N-diethly-3-methyl-benzamide)
• Picaridin (KBR 3023, Chemical Name: 2-(2-hydroxyethyl)-1-piperidinecarboxylic acid 1-methylpropyl ester )
• Oil of Lemon Eucalyptus* or PMD (Chemical Name: para-Menthane-3,8-diol) the synthesized version of oil of lemon eucalyptus
• IR3535 (Chemical Name: 3-[N-Butyl-N-acetyl]-aminopropionic acid, ethyl ester)

EPA characterizes the active ingredients DEET and Picaridin as "conventional repellents" and Oil of Lemon Eucalyptus, PMD, and IR3535 as "biopesticide repellents", which are derived from natural materials. For more information on repellent active ingredients, please visit:
For other information, visit the WCHD web site at or the Centers for Disease Control and Prevention at

(The Associated Press and Washoe County Health District contributed to this report.)

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