New Jersey DOH Vector-borne surveillance report, week 34

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Please find attached the NJDOH vector-borne surveillance report for week 34.

Report highlights:

• New Jersey is reporting three new cases of West Nile Virus (WNV) this week in Hudson (2) and Ocean counties. To date, there are four WNV cases and two presumptive viremic donors (PVD).
• Since last week’s report, 149 additional mosquito pools tested positive for WNV, for a total of 799 positive pools. The cumulative minimum infection rate is highest in Hudson and Mercer counties.
• The average number of Culex mosquitoes, which are associated with WNV transmission, was highest in Hudson County.
• So far in 2026, two mosquito pools tested positive for Jamestown Canyon Virus (JCV).  No human JCV cases have been reported in New Jersey 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 reported this week continues to be below historical averages.
• The number of tick-related emergency department visits continued to decrease and remains consistent 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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