MIKE MILLER / SCIENCE PHOTO LIBRARY MIKE MILLER / SCIENCE PHOTO LIBRARY
Mumps virus. Coloured transmission electron micrograph (TEM) of mumps virus ribonuclear protein helices (blue strands). These helices contain the genetic material ribonucleic acid (RNA) in combination with protein. A viral particle contains a single ribonuclear protein helix enclosed in a spherical protein shell, or capsid. Mumps virus is a contagious paramyxovirus, causing swelling of the parotid salivary glands, fever, headache and vomiting. Infection can spread to the pancreas, brain and testicles. In adult males, infection can cause sterility. Magnification unknown.
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