Vector Type
Mosquito
Vector Species Name
Aedes triseriatus
Vector Common Name
Eastern Tree Hole Mosquito
Transmitted Diseases

Vector Information

Aedes triseriatus (Ochlerotatus triseriatus) are found in eastern half of the US and southern Canada. Ae. triseriatus normally lays its eggs in pools of water accumulated in tree holes, but it will also lay eggs in man-made water holding containers, particularly discarded tires. They reproduce most frequently in natural or suburban forested areas. Ae. triseriatus overwinter as eggs located in dry nesting sites that become flooded in spring. Adults typically live two to five weeks. They are generally found in woodland/forested environments, including in suburban areas, and are infrequent in open areas. Ae. triseriatus normally lays its eggs in pools of water accumulated in tree holes, but it will also lay eggs in man-made water holding containers, particularly discarded tires. The breeding cycle (egg, larvae, pupae, adult) occurs over multiple seasons as Ae. triseriatus overwinter as eggs located in dry nesting sites that become flooded in spring. They have dark, unbanded legs, a black band in the middle of the thorax surrounded by silver/white on the side, black proboscis, and a black abdomen with silver scales laterally. Primarily mammalophilic, Ae. triseriatus most often feed on rodents but will also take a blood meal from humans. Feeding activity is largely crepuscular. Ae. triseriatus are the primary vector of La Crosse virus throughout their range but also transmit numerous other viral ailments.

Found In
AL
AR
CO
CT
DE
FL
GA
IL
IN
IA
KS
KY
LA
ME
MD
MA
MI
MN
MS
MT
NE
NH
NJ
NY
NC
OH
OK
OR
PA
RI
SC
SD
TN
TX
VT
VA
WV
WI
DC

*Disease transmission varies locally. This map depicts where vectors can be found geographically and provides information about diseases these vectors might carry. Vectors might be present in a state or locality, however, and not be carriers of any particular disease. In addition, identified vectors may have a presence in a state, but may not be found throughout that state.