New Jersey DOH Vector-borne surveillance report, week 37

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Please find attached the NJDOH vector-borne surveillance report for week 37. 

Report highlights: 

• New Jersey is reporting 12 additional West Nile Virus (WNV) cases this week, for a total of 18 WNV cases in 10 counties and four presumptive viremic blood donors (PVD). The number of reported cases in recent weeks is higher than average.
• Since last week’s report, 71 additional mosquito pools tested positive for WNV, for a total of 1,133 positive pools, which is higher than historical trends. The cumulative minimum infection rate is highest in Mercer and Hudson counties. The average number of Culex mosquitoes, which are associated with WNV transmission, is highest in Salem and Bergen counties.
• One mosquito pool tested positive for La Crosse virus in Sussex County in week 36.
• There were no new mosquito detections of Eastern equine encephalitis (EEE) or Jamestown Canyon virus (JCV) this week. To date, one mosquito pool has tested positive for EEE and five pools have tested positive for JCV. No human or animal cases have been reported in 2026.
• The number of tick-related emergency department visits increased this week and is higher than 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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This information has been broadcast to: Educational Institutions; Day Care Centers/Preschools; School Administrators (Gloucester County); School Administrators/Contacts; School Nurses; Community Health Centers(FQHCs); Health Care Facilities/Other; Health Care Providers; Hospitals/Acute Care; ICP (Gloucester County); Urgent Cares (Gloucester County); County Employees;