ID#: 23215
Description: Caption:
In this 2019 photo, a Centers for Disease Control and Prevention (CDC) scientist examines the result of a plaque assay, which is a test that allows scientist to count how many flu virus particles (virions) are in a mixture. To perform the test, scientists must first grow host cells that attach to the bottom of the plate, and then add virus to each well, so that the attached cells may be infected. After staining the uninfected cells purple, the scientist can count the clear spots on the plate, each representing a single virus particle.
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Content Providers(s): CDC/ Robert Denty
Creation Date: 2019
Photo Credit: James Gathany
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Copyright Restrictions: None - This image is in the public domain and thus free of any copyright restrictions. As a matter of courtesy we request that the content provider be credited and notified in any public or private usage of this image.