Morphology of echovirus 22.

Purified preparations of echovirus 22 were examined in the electron microscope. The virus was found to possess 32 capsomers arranged at the vertices of either a pentakis dodecahedron or a rhombic triacontahedron. The size of the virions ranges from 22 x 10(-3) to 32 x 10(-3) mum with a mean of 27 x 10(-3) mum and a mode of 28 x 10(-3) mum.