ID#: 17494
Caption:
This montage of negative-stained transmission electron microscopic (TEM) images, represents a comparative look at various pox viruses. (1) represents a mulberry form of the vaccinia virus. (2) depicts a parapoxvirus virus. (3) depicts three smallpox, or variola, viral particles, which had been present in a smallpox vesicular fluid specimen. All the viruses depicted here, are members of the family of viruses known as Poxviridae. Variola virus infects only humans, while vaccinia, and parapoxvirus viruses infect both humans, and animals, and may be passed from animals to human beings. Note the common morphology of the various Poxviridae members, exhibited in their overall, brick-shaped structure, though the parapoxvirus virus tends to be more ovoid.
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