Mosquito-Borne Disease Surveillance Data

Local Disease Surveillance

Madison County Health Department monitors and minimizes the spread of mosquito populations and species within the county able to spread disease to people. Our mosquito surveillance program collects mosquitoes for testing during the summer (see surveillance results below). We provide outreach and education on reducing mosquito habitat and precautions to minimize exposure.

Diseases Watched

We watch particularly for mosquito species locally that can spread:

See also other diseases spread by mosquitoes

Previous Community Survey

2015 Community Mosquito Survey (PDF).

Madison County Data

Madison County Public Health conducts weekly mosquito-borne disease surveillance from June - September. Data from 2023 is provisional, however a greater number of mosquitoes were collected later in the season compared to previous years. There were 193.6% more mosquitoes collected during the week of September 1st in 2023 compared to 2022.

2023 Mosquito-Borne Disease Surveillance Data

In the 2023 Mosquito collection season there was one positive case of West Nile Virus (WNV), James Canyon Virus (JCV), and Highlands J Virus (HJV) in the mosquito pools. No positive cases of Eastern Equine Encephalitis (EEE) in mosquito pools, animals, or humans in Madison County were detected. Mosquito Surveillance has concluded for the season as of September 29th, 2023.

Data Collection: June - September

Note: Counts for West Nile Virus (WNV), Eastern Equine Encephalitis (EEE), Jamestown Canyon Virus (JCV), Highland J. Virus (HJV), and Flanders Virus (FV) reflect positive identification of virus. Mosquitoes are typically pooled and tested in batches. Data is provisional and is updated weekly, Data was last updated October 11th, 2023.

2014 - 2022 Mosquito-Borne Disease Surveillance Data

Initial documentation of West Nile Virus (WNV) in Madison County was in 2011, followed by Eastern Equine Encephalitis (EEE) in 2013. Following consistent detections of EEE in Madison, Onondaga, and Oswego County in 2014, Madison County conducted its first aerial spraying in August of 2014. A spike in positive results was seen between 2014 - 2015, however has remained steady since. Additional viruses that Madison County has detected include the James Canyon Virus (JCV), Highland J. Virus (HJV), Cache Virus (CVV), Flanders Virus (FV), and the Potosi Virus (POTV).

Data Collection: June - September 

Note: Counts for West Nile Virus (WNV), Eastern Equine Encephalitis (EEE), Jamestown Canyon Virus (JCV), Cache Virus (CVV), Potosi Virus (POTV), Highland J. Virus (HJV), and Flanders Virus (FV) reflect positive identification of virus. Mosquitoes are typically pooled and tested in batches. 

New York State Data

View the Weekly Statewide Arboviral Surveillance Report.


Updated October 11th, 2023