Isolated Unknown Bacteria Agglutinated by Several Kinds of Anti-Shigella Sera

Three strains of Gram-negative rods which were non-motile and attacked glucose by fermentation with production of gas were isolated from human feces and temporarily named Nos. 71, 74, and 75 respectively. These strains were agglutinated by several kinds of anti-Shigella sera of A, B, C, and D groups.Anti-No.71 serum was able to agglutinate Shigella dysenteriae 3, 4, 5, 6 and 7, Shigella flexneri 1a, 1b, 2a, 2b, 4a, 4b and 5, Shigella boydii 6 and 10, and Shigella sonnei.Anti-No.74 serum was able to agglutinate Shigella dysenteriae 3, Shigella flexneri 1a, 1b, 2a, 2b, 3a, 3b, 4a, 4b, 4c, 5 and X, Shigella boydii 7 and 10, and Shigella sonnei II.Anti-No.75 serum was able to agglutinate Shigella dysenteriae 6, Shigella flexneri 1a, 1b, 2a, 2b, 3a, 3b, 4a, 4b, 4c, 5, X and Y, and Shigella boydii 5 and 7.It was impossible to identify these strains by using the method of Cowan and Steel, Bergey, Kauffmann, Sakazaki, or Edwards and Ewing.