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Microbiological and Chemical Exposure Assessment

Astrovirus

Astrovirus image

Photo Credit: F.P. Williams, U.S. EPA

These images are in the public domain and are thus free of any copyright restrictions. For public domain images, permission is not required for their use but we do ask that you credit the EPA and the contributors (found in the Photo Credit line) whenever an image is used in any publicly distributed media.

Note the star-like images exhibited by individual virus particles. These are distinct from the 'Star of David' image exhibited by typical calicivirus particles. Bar = 50 nanometers.

Source: Stool sample from an individual with gastroenteritis.

Method: Negative-stain Transmission Electron Microscopy

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