Principal Investigator: David
McNutt, MD, MPH, Health Officer Date: Sept.
3, 2004
Communicable Disease: West
Nile Virus
Press Release #: 2004WNV1
West Nile Virus (WNV) has been detected in 3 birds
from Santa Cruz County, a swallow and 2 Western scrub jays.
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The
positive birds were found in the Rio Del Mar and Aptos areas and the city of
Watsonville.
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Detection
of the virus in birds means that we may see human cases in the next few weeks.
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Mosquito
and Vector Control technicians have been sent to all 3 sites to target mosquito
breeding sources in the area.
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Public
Health is coordinating activities with the California State Department of Health,
the Mosquito and Vector Control Program in South County and the Environmental
Health Dept.
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A
Public Health Alert was sent to health care providers in the county with
specific information on signs and symptoms of West Nile Virus on May 25, 2004.
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A
Public Health education campaign was started at the beginning of the mosquito
season, including advertisements in local papers and movie theaters, TV
reports, and outreach to senior centers and long-term care facilities.
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There
is no evidence of horses and birds transmitting WNV directly to humans.
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WNV
is transmitted to humans and animals by mosquitoes and is not transmitted by
casual person-to-person contact.
Rarely, it has been transmitted via blood transfusions or organ
transplants.
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New
blood bank procedures now screen for WNV.
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Horses
can become ill from WNV but cats and dogs seem to be resistant to WNV.
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There
is a vaccine available for horses that has proven over time to be safe and
effective. There is no vaccine as yet
for humans.
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The
best way to protect yourself from WNV is to prevent exposure to mosquitoes.
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Drain all standing water at least
once a week to prevent mosquitoes from breeding. Be sure to check rain gutters, plants, buckets, pool and spa
covers, bird baths and any other items in your yard that may contain standing
water.
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Dress in long sleeves and long
pants when outdoors.
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Avoid
going outside at dusk and dawn when
mosquitoes are most active.
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Use
mosquito repellent that contains DEET on
exposed skin when you go outside. You
may also spray clothing with repellents that contain DEET or permethrin. Do not spray repellent on skin under
clothing. Do not use permethrin
directly on skin. Repellents are safe
and effective when used according to the directions on the package. Be sure to read and follow the
manufacturer’s DIRECTION FOR USE, especially when using on children.
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Make
sure window screens are in good repair to prevent mosquitoes from entering the
home.
For more information on West Nile Virus, visit www.cdc.gov or www.santacruzhealth.org
Health Alert: conveys the highest level of
importance; warrants immediate action or attention.
Health
Advisory: provides
important information for a specific incident or situation; may not require
immediate action.
Health Update:
provides
updated information regarding an incident or situation; unlikely to require
immediate action.