New In This Update
One new human case tests positive for West Nile Virus.
Eighteen new horses have tested positive for West Nile Virus.
More crows and mosquito pools have tested positive for the presence
of West Nile Virus. See “Crow Testing” and “Mosquito
To date, 148 New Jersey residents have been approved for WNV
testing. There are nineteen positive human cases, including
two blood donors; seventy-five have tested negative, thirty-two
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 1,440 crows have been submitted for testing by the
Department of Health and Senior Services Public Health and Environmental
Laboratory. Of those tested, 507 crows found in 21 counties have
been confirmed positive for the presence of WNV. Positive crows
have been found in Atlantic (53), Bergen (7), Burlington (35),
Camden (30), Cape May (12), Cumberland (20), Essex (7), Gloucester
(37), Hudson (1), Hunterdon (44), Mercer (15), Middlesex (22),
Monmouth (46), Morris (27), Ocean (66), Passaic (17), Salem (11),
Somerset (11), Sussex (1), Union (6), and Warren (39) counties.
- To date, 7,361 mosquito pools have been tested for the presence
of WNV, and 322 positive pools have been found in Atlantic (20),
Bergen (40), Burlington (8), Camden (4), Cape May (4), Cumberland
(5), Essex (13), Gloucester (38), Hudson (7), Hunterdon (26),
Mercer (28), Middlesex (20), Monmouth (15), Morris (10), Ocean
(15), Passaic (13), Salem (8), Somerset (15), Sussex (10), Union
(8), and Warren (11) counties.
- To date one hundred and eleven horses have tested positive for
the presence of WNV; they were found in 16 counties: Atlantic
(5), Burlington (7), Camden (5), Cape May (5), Cumberland (4),
Gloucester (24), Hunterdon (8), Mercer (3), Monmouth (11), Morris
(1), Ocean (7), Passaic (1), Salem (23), Somerset (1), Sussex
(2), 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.