Abstract
Summary
Among 29 strains of Coxsackie virus tested in embryonated eggs, one strain, serologically Group A, Type 2, exhibited unusual pathogenicity for chick embryos. Of 16 strains tested, the same strain, 3 other Type 2 strains, and a Group A, Type 4 strain grew readily in vitro on embryo chick tissue. These results suggest that strain differences are a primary factor in adaptation to growth in embryonated eggs or tissue culture.
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