Aedes (Och.) infirmatus




Mexico, United States, contiguous lower 48


  • None


The larvae of Aedes infirmatus develop from early spring to late fall in temporary pools following rains. The females are persistent biters attacking during the day in or near wooded areas. They are occasionally encountered at night near dwellings, but seldom enter the buildings. (Carpenter and LaCasse 1955:200)

Medical Importance

Trivittatus virus (Wellings, Lewis and Pierce, 1972), was recovered frequently and predominantly from infirmatus in Florida, although human disease from this source was uncommon. A Trivittatus virus-infirmatus cycle was later confirmed by Taylor, Lewis et al. (1971) in Florida in a 1966-1967. In a summary report on arboviral ecological studies in the same area of Florida, Wellings, Lewis and Pierce (1972) report eastern equine encephalitis (EEE), Keystone, Trivittatus and Tensaw virus isolations from infirmatus. One isolation of Trivittatus virus from infirmatus in southern Alabama is reported by Sudia, Chamberlain and Coleman (1968). (Arnell 1976:8)

Culicidae » Culicinae » Aedini » Aedes » Ochlerotatus
habitus image

Photo credit: J. Stoffer, WRBU.

Additional References


Adult Stage, detail images:

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Adult Stage, illustrations:

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