title: SIMIAN VIRUS 40: ISOLATION OF TWO PLAQUE TYPES.
abstract: Two different morphological plaque types of simian virus 40 were isolated from three of six strains. Increased uptake of neutral red gave one type of plaque a uniform red appearance, whereas the center of the other remained unstained. The viruses showed stability of plaque morphology on passage in tissue culture; cross neutralization studies identified both as simian virus 40.
mesh_terms: D007159:Immunologic Tests; D012106:Research; D013539:Simian virus 40; D046509:Tissue Culture Techniques; D014776:Virus Cultivation
keywords: EXPERIMENTAL LAB STUDY; SV40 VIRUS; TISSUE CULTURE; VIRUS CULTIVATION