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. 2005 Nov 2;37(2):91–106. doi: 10.1016/j.micron.2005.10.001

Fig. 17.

Fig. 17

Negatively stained (PTA) preparation showing a group of sapoviruses from a diarrhoeal sample from a childhood case of gastroenteritis. Note surface cups that are characteristic of this virus and various orientations consistent with icosahedral symmetry. Sapoviruses are 33–35 nm in diameter.