New Jersey DOH Vector-borne surveillance report, week 32

Date:8/21/2026

Official Message No.:112735-8-21-2026-PHIN

Contact Info: George | george.keefer@doh.nj.gov

Kim | kim.cervantes@doh.nj.gov

Attachments: Yes Attachment 1

Please find attached the NJDOH vector-borne surveillance report for week 32.

Report highlights:

NJDOH is reporting one human case of West Nile Virus (WNV) in Monmouth County. To date, there has been one human case and two presumptive viremic donors (PVD).
Since last week’s report, 110 additional mosquito pools tested positive for WNV, for a total of 537 positive pools from 20 counties. Mosquito detections this year are higher than historical averages.
The average number of Culex mosquitoes, which are associated with WNV transmission, was highest in Bergen and Hudson counties.
One mosquito pool tested positive for Jamestown Canyon Virus (JCV) in week 32 from Union County. There have been no human cases of JCV in 2026.
There have been no human or animal cases, or mosquito detections of Eastern equine encephalitis (EEE) in 2026.
The number of Lyme disease cases continued to decrease this week and remains below historical averages.
The number of tick-related emergency department visits continued to decrease and is level with historical averages.

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

Previous reports can be accessed anytime on our website at: https://www.nj.gov/health/cd/statistics/arboviral-stats/index.shtml

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