صورة:Rotavirus.jpg

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From http://www.epa.gov/nerlcwww/rota.htm Image by F.P. Williams, U.S. EPA

Note the wheel-like appearance of some of the rotavirus particles. The observance of such particles gave the virus its name ('rota' being the Latin word meaning wheel). Bar = 100 nanometers. Source: Cell culture. Method: Negative-stain Transmission Electron Microscopy

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