Abstract
Horseradish peroxidase-labeled antibody was used for light and electron microscopic localization of reovirus antigen in tissue culture. Reaction product in infected cells was easily detected in the cytoplasm, and the procedure was as sensitive as the fluorescent-antibody technique. At the electron microscopic level, infected and enzyme-labeled antibody-treated cells showed accumulations of reaction product at the sites of viral replication and around the viral particles. Reaction product was not detected in unstained infected cells, in stained uninfected cells, or in cells infected with an unrelated virus.
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