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From the Department of Virus and Rickettsial Diseases, Army Medical Department Research and Graduate School, Army Medical Center, Washington 12, D. C.
Abstract
By means of neutralization, complement-fixation, and cross-immunity tests, the viruses known as encephalomyocarditis, Columbia-SK, M. M., and Mengo encephalomyelitis have been found to be identical.
Analysis of their known physical and pathogenic properties further indicates that they are probably different strains of a single virus.
We have been unable to demonstrate any relationship between the four strains of this virus and the Lansing, Yale-SK and Brunhilde strains of poliomyelitis or a murine encephalomyelitis virus.
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