Public Health Info: New Jersey DOH Vector-borne Surveillance Report, Week 39

What You Need To Know

Please find below the NJDOH vector-borne surveillance report for week 39.

Report highlights:

NJDOH is reporting three new West Nile Virus (WNV) human cases. To date there are 16 cases and three presumptive viremic blood donors (PVD). No animal or avian cases of WNV have been reported.
Forty-seven additional mosquito pools tested positive for WNV since last week’s report, for a total of 1,114 positive mosquito pools. The number of weekly detections in mosquitoes started to decline in week 36 but remains above the five-year average for this time of year.
The average number of Culex mosquitoes reported in the previous two weeks was highest in Hudson, Salem, and Gloucester counties (data unavailable for six counties). Culex mosquitoes are predominantly responsible for WNV transmission and are often found around the home, taking advantage of standing water sources (e.g., buckets, wheelbarrows, tarps).
NJDOH is reporting one Jamestown Canyon Virus (JCV) human case in week 34 from Middlesex County. To date four mosquito pools have tested positive for JCV.
Three additional mosquito pools tested positive for Eastern Equine Encephalitis (EEE) in Atlantic County. To date, thirteen mosquito pools have tested positive for EEE, all in southern NJ, and two pools tested positive for La Crosse Encephalitis Virus (LAC). There have been no human or animal cases of EEE or LAC in 2025.
There have been two cases of Powassan virus (POWV) reported in Morris and Monmouth counties and one case of malaria under investigation lacking relevant international travel history..

N.J. vector-borne disease data is available online: https://dashboards.doh.nj.gov/views/public_dashboard/Intro and can be accessed on the “Fight the Bite N.J.” webpage: https://www.nj.gov/health/cd/topics/vectorborne.shtml.