Public Health Info: New Jersey DOH Vector-borne Surveillance Report, Week 35

What You Need To Know

Please find below the NJDOH vector-borne surveillance report for week 35.

Report highlights:

To date there have been two West Nile Virus (WNV) human cases with multiple cases under investigation and one presumptive viremic blood donor (PVD). No animal or avian cases of WNV have been reported to date.
Ninety-three additional mosquito pools tested positive for WNV since last week’s report, for a total of 869 positive mosquito pools in all 21 counties. Recent week’s virus detections are substantially higher than the five-year average.
The average number of Culex mosquitoes reported in the previous two weeks was highest in Union County, followed by Hudson and Sussex 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).
To date, three mosquito pools have tested positive for Jamestown Canyon Virus (JCV), two have tested positive for Eastern Equine Encephalitis (EEE), and two have tested positive for La Crosse Encephalitis Virus (LAC). There have been no human or animal cases of EEE, JCV 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.
The number of anaplasmosis and babesiosis cases has exceeded 2024 totals. Tick-related emergency department visits continued to decline but are expected to increase in the fall when adult deer ticks are active.

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.