Isolation of Specific Types of Streptococci and Virus from the Stool in Studies of Epidemic Poliomyelitis and Encephalitis, and the Production of Virus from the “Poliomyelitic” Streptococci Edward Rosenow, MD / January 13, 1943Staff Meetings of the Mayo Clinic. January 13, 1943. Pages 5 – 16. This is members-only content. Please log in above to access the full PDF.