EM UNIT, UNIVERSITY OF SOUTHAMPTON / SCIENCE PHOTO LIBRARY EM UNIT, UNIVERSITY OF SOUTHAMPTON / SCIENCE PHOTO LIBRARY
False-colour transmission electron micrograph (TEM) of rotaviruses. Rotaviruses belong to the genus Reovirus, and are the causative agent of infantile gastroenteritis in humans, mice and calves. The viruses are 70-75 nanometres in diameter, and do not have the lipoprotein envelope seen in many other genera. The genome of this virus is a double-stranded RNA, fragmented into ten segments. The virus gets its name from the wheel-like appearance of the capsid (protein shell). Magnification: x89,000 at 6x4.5cm size.
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