The Salmonella definition propounded by P. Bruce White in 1929 and accepted and published 1934 (1) by the Salmonella Sub-Committee of the Nomenclature Committee of the International Association of Microbiologists, stated that Salmonella organisms form a large genus of serologically related, gram-negative and non-sporing bacilli, which are usually motile; which fail to ferment lactose and sucrose, to clot milk, to liquefy gelatin or to produce indole, which regularly attack glucose either with or without gas production, and all the known species of which are pathogenic for man, animals, or both. Since that time, serologically typical Salmonella strains have been observed which do not possess all the aforementioned cultural characteristics. On the other hand, cultures belonging to different bacterial species, e.g., E. coli and various Shigella have displayed distinct serological relationship to the Salmonella group (2–4).