The Relationship of the Enterobacterium A 12 (Sachs) to Shigella boydii 14

Abstract

The relationship of the enterobacterium A 12 (Sachs) to Shigella boydii 14 is shown by comparison of their biochemical and serological reactions. The aerogenic, mannitol-negative A 12 is serologically identical with the typical Shigella serotype, S. boydii 14. As mannitol-negative strains of S. boydii 14 exist and as the aerogenic A 12 organism is otherwise biochemically typical of the Shigella group, it is proposed that A 12 be regarded as a biochemical variety of S. boydii 14 analogous to the accepted aerogenic biochemical varieties of S. flexneri 6.