Public Health Info: New Jersey DOH Vector-borne Surveillance Report, Week 23

What You Need To Know

Please find below the NJDOH vector-borne surveillance report for week 23.

Report highlights:

One additional mosquito pool tested positive for West Nile Virus (WNV) in week 23 from Middlesex County. Ten mosquito pools have tested positive in 2025 in Bergen, Cape May, Gloucester, Middlesex, Morris and Warren counties.
The average number of Culex mosquitoes reported in the previous two weeks was highest in Union County, followed by Cumberland and Warren 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).
There have been no human or animal cases of WNV and no human, animal, or mosquito detections of Eastern equine encephalitis (EEE) or Jamestown Canyon virus (JCV) in 2025.
The number of Lyme disease cases is consistent with seasonal trends.
The number of tick-related emergency department visits increased from the previous week and remains higher than last year and the 5-year average. The highest number of visits continues to be in the central east region.

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.