Public Health Info: New Jersey DOH Vector-borne Surveillance Report, Week 33

What You Need To Know

Please find below the NJDOH vector-borne surveillance report for week 33.

Report highlights:

New Jersey is reporting one probable West Nile Virus (WNV) case in week 30 from Atlantic County (confirmatory testing pending). One WNV presumptive viremic blood donor (PVD) was reported in week 32 from Sussex County. No animal cases of WNV have been reported to date.
NJ is investigating a case of malaria in Morris County with no recent international travel. Mosquito surveillance is ongoing; no mosquitoes have tested positive for malaria parasites.
One hundred twenty-seven additional mosquito pools tested positive for WNV since last week’s report, for a total of 633 positive mosquito pools in all 21 counties.
The average number of Culex mosquitoes reported in the previous two weeks was highest in Salem County, followed by Hudson and Union 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).
The first mosquito pool positive for Eastern equine encephalitis (EEE) was detected in Atlantic County in week 33. To date, three mosquito pools have tested positive for Jamestown Canyon Virus (JCV) and one has 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.

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.