New In This Update
- Seven new human cases test positive for West Nile
- Thirty-three 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, 137 New Jersey residents have been approved for WNV
testing. There are seventeen positive human cases, including
two blood donors; seventy-two have tested negative, twenty-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 criteria.
- 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 1403 crows have been submitted for testing by the
Department of Health and Senior Services Public Health and Environmental
Laboratory. Of those tested, 495 crows found in 21 counties have
been confirmed positive for the presence of WNV. Positive crows
have been found in Atlantic (52), Bergen (7), Burlington (35),
Camden (30), Cape May (12), Cumberland (20), Essex (7), Gloucester
(37), Hudson (1), Hunterdon (43), Mercer (15), Middlesex (23),
Monmouth (44), Morris (26), Ocean (65), Passaic (16), Salem (11),
Somerset (9), Sussex (1), Union (5), and Warren (36) counties.
- To date, 6,980 mosquito pools have been tested for the presence
of WNV, and 215 positive pools have been found in Atlantic (19),
Bergen (40), Burlington (8), Camden (2), Cape May (3), Cumberland
(5), Essex (11), Gloucester (37), Hudson (7), Hunterdon (23),
Mercer (25), Middlesex (18), Monmouth (14), Morris (10), Ocean
(15), Passaic (12), Salem (4), Somerset (15), Sussex (10), Union
(8), and Warren (11) counties.
- To date ninety-three horses have tested positive for the presence
of WNV; they were found in 15 counties: Atlantic (3), Burlington
(6), Camden (3), Cape May (3), Cumberland (2), Gloucester (20),
Hunterdon (8), Mercer (2), Monmouth (11), Ocean (6), Passaic
(1), Salem (22), Somerset (1), Sussex (1), 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.