DENNIS KUNKEL MICROSCOPY / SCIENCE PHOTO LIBRARY DENNIS KUNKEL MICROSCOPY / SCIENCE PHOTO LIBRARY
Scanning electron micrograph (SEM) of common house mosquito wing (Culex sp.). Mosquito wings are covered with fine scales. These numerous small scales are located along the veins and edges of the wings. They help to eliminate drag and improve flight efficiency. Mosquitoes have small wings that beat up to 600 times per second to produce the familiar whine we hear. Culex species lay their eggs in the form of egg rafts that float in still or stagnant water. In the United States, West Nile virus is transmitted primarily by Culex pipiens mosquitoes. Culex spp. West Nile virus and in turn transmits the virus to humans where it can cause encephalitis and meningitis. Culex spp. Saint Louis encephalitis. Magnification: x60 when shortest axis printed at 25 millimetres.
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