West Nile virus (WNV) is a serious health threat for people, horses and
many species of birds and other animals. WNV is a mosquito-borne virus
that was first documented on the east coast of the US in 1999. The
virus has spread to the Pacific coast in the span of four years, as well as
into Canada and into Mexico and parts of the Caribbean. In August 2003,
West Nile virus was detected in Utah. Eleven human cases of WNV were
reported in Utah throughout 2004. Davis County had one human case
during that time.
The disease first became widespread throughout many states in 2002. That
year, there were more than 4,000 human cases of West Nile disease with nearly
300 deaths.
Many of those who develop West Nile encephalitis (inflammation of the brain)
will suffer from long-term disability due to their infection, and roughly ten
percent of those with severe disease will die. Most people infected with
WNV will have no symptoms or develop only mild disease. Although West Nile
virus can affect people of all ages, persons over the age of 50 are more likely
to suffer severe disease if infected. There is no treatment for infection
with the virus, beyond supportive care.
West Nile virus is spread mainly through the bite of infected mosquitoes.
People can protect themselves from infection by using insect repellents containing
DEET, wearing protective clothing, keeping window and door screens intact, and
avoiding prime mosquito biting hours. Another important step is to avoid
having water-holding containers, which provide breeding sites for mosquitoes.
Mosquito Abatement District-Davis also carries out mosquito control
activities to further limit the population of mosquito vectors.
West Nile virus has now spread throughout the United States. Many people are
not yet aware that they and members of their families need to be concerned about
this virus, and to take actions to protect themselves.
(801) 451-3660
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