During August and September thousands of horses in fields and race tracks in many parts of the U.S. drooped their necks, banged their heads against the ground, tried to run on their sides, collapsed on the turf. In Massachusetts alone 200 horses died, victims of equine encephalomyelitis. Entirely different are the eastern and western varieties of this disease, although both are caused by viruses which attack the brain and spinal cord, produce inflammation, high fever, and in some localities 100% mortality. Last spring Dr. Ralph Walter Graystone Wyckoff of Lederle Laboratories...
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