| Description: | Caption:
This negatively-stained, 1975 transmission electron microscopic (TEM) image revealed the presence of a number of Venezuelan equine encephalitis (VEE) virus virions in this tissue specimen, which had been fixed using phosphotungstic acid (PTA). This chemical is very electron-dense, and due to electrostatic forces of attraction, clings to the capsid surface of each viral particle or virion, thereby, highlighting the presence of such pathogens. VEE is a Togaviridae family member, and a member of the genus Alphavirus.
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