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SOUTH DAKOTA FACTS:
Based on a Center for Disease Control (CDC)
report, 19 of the 43 mosquito species found in
South Dakota can potentially transmit the West Nile Virus.
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Scott Guffey, Supervisor
Craig Smith, Crew Leader
Ruth Sisk, Secretary
Pennington County
Weed & Pest
3607 Cambell Street
Rapid City, SD 57701
Phone: (605)394-5320
Fax: (605)716-3793
Contact Weed & Pest
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Pennington County Home > West Nile
> FAQ's |
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ANSWERS TO QUESTIONS FREQUENTLY ASKED ABOUT WEST NILE VIRUS
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What is West Nile virus disease?
West Nile virus disease is a mosquito-borne infection that can cause mild flu-like illness
or severe encephalitis. Although chances of a person getting encephalitis are small,
there are some steps you can take to reduce your risk of being bitten by mosquitoes.
- What is encephalitis?
Encephalitis is an infection of the brain. The symptoms include headache, high fever,
stiff neck, stupor, disorientation, coma, tremors, convulsions, weakness and paralysis.
These symptoms may last several week, although neurological effects may be
permanent.
- What is the chemical content in the spray that is being used when they fog an area
for mosquitoes?
These are the labels and Material Safety Data Sheets of the chemicals in the spray that is
being used for mosquito management.
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Should we stay indoors?
It is not necessary to limit any outdoor activities, unless local officials advise you
otherwise. However, you can and should try to reduce your risk of being bitten by
mosquitoes. In addition to reducing stagnant water in your yard, make sure all windows
and doors have screens, and that all screens are in good repair. If WNV is found in your
area:
- Minimize time spent outdoors between dusk and dawn.
- Wear shoes, socks, long pants and a long-sleeved shirt when outdoors for long
periods of time, or when mosquitoes are most active.
- Use mosquito repellent containing DEET or Picaridin, according to directions..
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Do all mosquitoes transmit disease?
No. Some mosquitoes do not transmit disease. There have been 43 different species of
mosquitoes identified in South Dakota. Of these only 9 species are known vectors of
WNV. Other species have been associated with WNV in other states.
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Where do mosquitoes live and breed?
The mosquito that commonly transmits WNV lays its eggs in stagnant water, both in
natural ground pools and in artificial containers. The eggs become larvae that remain in
the water until they mature and fly off. Weeds, tall grass and shrubbery provide an
outdoor home for adult mosquitoes. They can also enter houses through unscreened
windows or doors, or broken screens. Most mosquitoes will breed in discarded tires.
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When are mosquitoes most active?
Some mosquitoes are most active between dusk and dawn, when the air is calm.
However, others may be present at any time of day, and feed during the daytime and at
dusk.
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What bird(s) can carry West Nile virus?
Although most birds can be infected with West Nile virus, crows, blue jays, magpies,
hawks, owls and eagles are most likely to die from the virus.
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Can you get West Nile virus directly from birds?
There is no evidence that a person can get the virus from handling live or dead infected
birds. However, avoid bare-handed contact when handling any dead animals and birds.
Use gloves or double plastic bags to place the carcass in a garbage can.
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Can other animals become infected?
Yes. WNV can make horses very ill. It can also be detected in dogs, cats, bats,
chipmunks, raccoons, skunks, squirrels, and domestic rabbits. It is important to
remember that animals cannot transmit WNV to people.
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How can I protect my family and myself?
Use mosquito repellent containing DEET, according to directions, when you are
outdoors.
To reduce the mosquito population around your home and property, reduce or eliminate
all standing water:
- Remove all discarded tires, an important breeding source for mosquitoes, from your property.
- Drill holes in the bottoms of recycling containers that are kept outdoors.
- Make sure roof gutters drain properly, and clean clogged gutters in the spring and fall.
- Turn over plastic wading pools and wheelbarrows when not in use.
- Change the water in birdbaths.
- Clean vegetation and debris from edges of ponds.
- Clean and chlorinate swimming pools, outdoor saunas and hot tubs.
- Drain water from pool covers.
- Use landscaping to eliminate standing water that collects on your property.
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Since bats eat insects should we encourage bats to live on our property to help
control mosquitoes?
No. Research has shown that insectivorous bats are selective feeders and mosquitoes
make up a very small percent of their diet. They will typically feed on the larger insects.
Bats can also harbor and transmit rabies. Bats are not an adequate means in controlling
the population of mosquitoes.
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Is there a vaccine against West Nile encephalitis?
There is no human vaccine for WNV.
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Should people take the West Nile virus vaccine that is licensed for use in horses?
No. This vaccine has not been studied in humans and could be harmful. The
effectiveness of this vaccine in preventing West Nile virus infections in horses has yet to
be fully evaluated, and its effectiveness in humans is completely unknown. Veterinary
vaccines are not manufactured with the same standards required of human vaccines,
nor are they required to undergo the extensive field testing required of human vaccines
before they are licensed. For these reasons, veterinary vaccines and other veterinary
drugs should never be used in humans.
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