New In This Update
- To date, six human cases of West Nile virus (WNV) have been detected
-- three in Mercer County and one each in Hudson, Burlington and Cape
- More crows and mosquitoes have tested positive for the presence of
- In total, 112 residents have been approved for WNV testing this season.
Blood and/or spinal fluid samples from these individuals are in the
process of being tested for the presence of WNV. These individuals either
had symptoms or signs that met the established WNV testing criteria
or exhibited most of the symptoms and are from counties where dead crows
and/or mosquitoes with the virus have been discovered.
- To date, 50 are negative, 56 tests on people are pending and 6 positive.
- 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. Testing results
are sent to the CDC for confirmation.
Crow, American Kestrel and Other Bird and Small Mammal Testing
- To date, 1,011 crows have been accepted for testing by the Department
of Health and Senior Services' Public Health and Environmental Laboratory.
Of those tested, 739 crows found in 20 counties have been confirmed
positive for the presence of WNV. Positive crows have been found in
Atlantic (28), Bergen (79), Burlington (54), Camden (26), Cape May (3),
Cumberland (18), Essex (8), Gloucester (46), Hunterdon (11), Mercer
(40), Middlesex (50), Monmouth (157), Morris (70), Ocean (67), Passaic
(24), Salem (11), Somerset (22), Sussex (1), Union (19), and Warren
- The department has also received 383 bird samples (mostly crows)
deemed unsatisfactory for testing and has been notified of 1186 dead
or ill birds (mostly crows) not submitted for testing due to their condition.
- To date, 6,497 mosquito pools have been tested in the state laboratory
for the presence of WNV and 300 pools found in 19 counties have tested
positive for WNV. Positive mosquitoes were collected in Atlantic (22)
Bergen (74), Burlington (9), Camden (5), Cape May (2), Essex (9), Gloucester
(13), Hudson (1), Hunterdon (3), Mercer (2), Middlesex (27), Monmouth
(26), Morris (24), Ocean (20), Passaic (38), Salem (3), Somerset (12),
Union (8) and Warren (2) Counties.
- 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 website at
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 from infection.
- 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 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
or from person to person. WNV infection generally causes no symptoms
or just mild, flu-like symptoms; however, the elderly are at higher
risk of more severe disease.
- Between 1999 and 2001, lab testing confirmed WNV infection in 18
New Jersey residents, with two resulting fatalities. The virus has also
been detected in mosquitoes, horses, or crows and other birds 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.