Latest Mosquito Testing Results
The Connecticut Agricultural Experiment Station traps, identifies, and tests mosquitoes for encephalitis viruses.
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Frequently asked questions about mosquitoes.
Links to webpages for frequently asked questions about mosquitoes, mosquito control and protection, West Nile virus, and eastern equine encephalitis.
Mosquito Control Using Larvicides - FAQs
Frequently asked questions about controlling mosquitoes using larvicides.
DPH announces first case of West Nile virus infection this year
A Connecticut resident tested positive for West Nile virus in July 2023.
Connecticut Confirms First Case of Eastern Equine Encephalitis for 2023 in Emu
State Veterinarian Stresses Importance of Vaccinations to Protect Animals
DPH announces second case of West Nile virus infection this year
A second Connecticut resident has tested positive for West Nile virus (WNV) infection.
State Mosquito Monitoring Program Begins Testing for Mosquito-Borne Viral Diseases
The mosquito trapping and testing program, coordinated by the Connecticut Agricultural Experiment Station, begins June 2, 2025, and lasts until the end of October.
State Reports Expansion of West Nile Virus
The State Mosquito Management Program is warning Connecticut residents about the increasing risk of infection by West Nile virus this season.
Mosquito Season Alert-CT Horse and Livestock Owners Advised to Guard Against Mosquito-Borne Diseases
The Connecticut Department of Agriculture reminds the state’s horse and livestock community to take preventative measures to protect against mosquito-borne diseases this season.
Connecticut DPH Announces First Two Cases of West Nile Virus Infection this Year
Residents Advised to Protect Themselves and Family Members from Mosquito Bites
Risk of West Nile Virus Continues - Third Human Case Identified in the State
Virus-positive mosquitoes continue to be detected in Connecticut towns
Equine Owners Reminded to Protect Against Mosquito-Borne Diseases
The Connecticut Department of Agriculture (CT DoAg) reminds the state’s equine community to take appropriate measures to protect against mosquito-borne diseases this season, including eastern equine encephalitis and West Nile virus.
State Reports Expansion of West Nile Virus
The State Mosquito Management Program is warning Connecticut residents about the increasing risk of infection by West Nile virus this season.
State Reports Positive Mosquitoes for West Nile Virus in New Haven
The State of Connecticut Mosquito Management Program announced that mosquitoes trapped in New Haven on June 17, 2024, tested positive for West Nile virus.
DEEP Reports Case of EEE in White-tailed Deer in Connecticut
A white-tailed deer that exhibited neurologic symptoms and died on August 12, 2024, in Lisbon, Connecticut, was infected with the EEE virus.