New In This Update
Two new human cases test positive for West Nile
Five new horses have tested positive for West Nile
More mosquito pools have tested positive for the
presence of West Nile Virus. See “Crow Testing” and “Mosquito
To date, 166 New Jersey residents have been approved
for WNV testing. There are twenty-eight positive human cases,
including two blood donors; eighty-six have tested negative,
thirty are pending, and the samples have not yet been received
for the remainder. Blood and/or spinal fluid samples from these
individuals were tested for the presence of WNV. These individuals
either had symptoms or signs that met the established WNV testing
Human testing for WNV is being conducted at the New
Jersey Department of Health and Senior Services’ Public
Health and Environmental Laboratory in Trenton and at public
health labs in other states.
- To date 1,472 crows have been submitted for testing
by the Department of Health and Senior Services Public Health
and Environmental Laboratory. Of those tested, 509 crows found
in 21 counties have been confirmed positive for the presence
of WNV. Positive crows have been found in Atlantic (54), Bergen
(7), Burlington (35), Camden (30), Cape May (12), Cumberland
(20), Essex (7), Gloucester (37), Hudson (1), Hunterdon (44),
Mercer (15), Middlesex (23), Monmouth (46), Morris (27), Ocean
(66), Passaic (17), Salem (11), Somerset (11), Sussex (1), Union
(6), and Warren (39) counties.
- To date, 8,262 mosquito pools have been tested for
the presence of WNV, and 347 positive pools have been found in
Atlantic (20), Bergen (49), Burlington (8), Camden (4), Cape
May (6), Cumberland (5), Essex (13), Gloucester (43), Hudson
(12), Hunterdon (31), Mercer (28), Middlesex (20), Monmouth (15),
Morris (10), Ocean (16), Passaic (14), Salem (8), Somerset (15),
Sussex (10), Union (8), and Warren (12) counties.
- To date one hundred and thirty-six horses have tested
positive for the presence of WNV; they were found in 16 counties:
Atlantic (8), Burlington (11), Camden (5), Cape May (5), Cumberland
(6), Gloucester (27), Hunterdon (11), Mercer (3), Monmouth (15),
Morris (1), Ocean (8), Passaic (1), Salem (25), Somerset (1),
Sussex (3), and Warren (4). Equine testing is conducted by the
New Jersey Department of Agriculture’s animal health laboratory
in Trenton and positive results are sent to the National Veterinary
Services Lab (NVSL) in Ames, Iowa for confirmation. For more
information, visit the Department of Agriculture web site at, www.state.nj.us/agriculture.
Additional Information & Advisories
The risk of WNV infection has increased with the arrival
of summer and people should take steps now to eliminate mosquito-breeding
areas around their homes and protect themselves and their families
Among the personal precautions residents can take now are
such measures as eliminating standing water on their own property
(such as clearing clogged gutters, draining flower pots, recycling
old car tires, etc.), and repairing window and door screens.
In the spring, summer, and fall residents can spray insect
repellent on their clothing and exposed skin in accordance
with labeling directions, wear long sleeved shirts and pants
when outdoors, or curb outdoor activities at dawn, dusk and
during the evening.
The West Nile virus, an arboviral disease, is transmitted
through the bite of a mosquito that has picked up the virus
by feeding on an infected bird. WNV is not directly transmitted
from birds to humans. WNV infection generally causes no symptoms
or just mild, flu-like symptoms; however, the elderly are at
higher risk of more severe disease.
In New Jersey, a total of 43 people have been diagnosed with
WNV between 1999 and 2002. Lab testing confirmed WNV infection
in these residents, with two resulting fatalities. WNV activity
(identified from avian, equine and/or mosquito surveillance)
has been detected in every county in New Jersey.
New Jersey's WNV surveillance, control and prevention activities
involve the coordinated efforts of a number of federal, state
and local agencies. These include the New Jersey Departments
of Health and Senior Services, Environmental Protection, and
Agriculture, the CDC, the State Mosquito Control Commission,
the Rutgers Mosquito Research and Control Unit, and local health
and mosquito control agencies.