April 2015

Eastern equine encephalitis

Pathogen

The first confirmed human cases of Eastern equine encephalitis were identified in 1938, when 30 children died of encephalitis in the northeastern United States. These cases coincided with outbreaks in horses in the same region. The fatality rate in humans is approximately 33% and there is currently no cure for human infections.

Distribution

Eastern equine encephalitis
Eastern equine encephalitis
Coquillettidia perturbans
Coquillettidia perturbans
Coquillettidia_Perturbans
EEE

Vector – Coquillettidia perturbans 

Known as the “cattail mosquito,” Coquillettidia perturbans prefers areas of low elevation, high concentrations of vegetation, and still waters. Larvae are unique in that they attach themselves, with a modified siphon, to succulent vegetation for their oxygen source. Females bite primarily at night, usually during the early hours, but they can also be found in shady areas of their habitat during the day.

Larval Habitat

Dense emergent vegetation