Ivan Saphra

A heretofore Undescribed Phase-Variation in Salmonella.

Summary and Conclusions The natural appearance of an inagglutinable but antigenproducing “mixed” phase of a S. typhimurium is described. The phase i, the presence of which could not be elicited in the original cultures, was brought out by the use of Gard technic. An agglutinable “mixed” phase was produced in vivo. Data on the different phase variations of this Salmonella variant are given. The described observations raise a number of theoretical questions unanswerable for the time being. This paper, therefore, limits itself to a statement of the facts.

A New Salmonella Type : S. Virginia.

Summary S. Virginia, a new Salmonella type, has been described. It was isolated from a case of human enteritis and has the formula VIII; d —.