P. R. Edwards

Flagella and Flagellar Antigens in “Non-Motile” Salmonella Cultures.

Summary Two apparently nonmotile strains possessed well-developed flagella and flagellar antigens. One of the types (III, XV:e.h) eventually yielded motile elements after serial transfer in semisolid medium. The other (S. sandiego) gave no evidence of motility after similar treatment.

Intertransformability of Salmonella Simsbury and Salmonella senftenberg.

Summary By growth in serums it was possible to change S. Simsbury (I,III,-XIX:z27) S. Simsbury to S. senftenberg(I,III, XIX:g,s,t) and viceversa. The change was accomplished without difficulty but the reverse was done only by first transforming the H antigens to a hitherto unrecognized form (Z34) and then changing them to Z27. It is recommended that S. Simsbury be dropped from the classification and that the formula of S. senftenberg be written

Three New Salmonella Types: S. richmond, S. daytona and S. tallahassee.

Summary Three new Salmonella types were described: S. richmond (VI, VII: y—1,2,3…), S. daytona (VI, VII :k—1,6…) and S. tallahassee (VI, VIII:z4, z32…). Attention was directed to the necessity of redefining factors z23 and z24 since S. tallahassee was agglutinated by both serums as they previously were prepared.

Natural occurrence of an induced antigen in Salmonella cultures.

It is known1-6 that H antigens of Salmonella can be markedly changed by cultivating the organisms in serum containing agglutinins for the flagellar components. Excepting S. abortus-equi 4 and S. paratyphi A, 5 all antigens so obtained have had little or no relationship to naturally occurring H antigens of the genus, and have been referred to as induced or artificial forms. Whether these are minor components of the flagellar complex brought into prominence, or artifacts produced by action of the serum, has been the subject of some discussion. Hitherto, such forms have not been recognized in nature, although Eriksson and Malmströ 7 found agglutinins for an induced phase of S. newport in the serum of a patient infected with that type. The present note records the occurrence in nature of antigens apparently identical with those obtained by cultivation of Salmonella in agglutinating serum. Since April, 1945, 14 cultures received from Connecticut, Maryland, Florids, Illinois, California and Uruguay, were apparently monophasic variants of S. minnesota, which had the formula XXI, XXVI:b. Phase 2 (e,n,x,…) could not be demonstrated. When stabbed into semi-solid agar containing b serum, the cultures were either confined to the site of inoculation or produced one or 2 small bulbs of spreading growth which

A new Salmonella type: S. lawndale

SUMMARY A new Salmonella serotype, (9, 12: z - 1, 5) S. lawndale, is described. It is indol positive and was isolated from a case of enteric infection in a human.

Two related Salmonella types, S. luciana and S. marseille.

Summary Two new Salmonella types were described. S. luciana (XI:a-e, n, Zi5 …) was recovered from the feces of a normal food handler while S. marseille (XI: a-1,5 …) was isolated from the stools of a patient affected with gastro-enteritis.

A new Salmonella type Salmonella pensacola.

Summary A new Salmonella type isolated from gastro-enteritis in man was described. It was called S. pensacola and was assigned the formula IX, XII: g, m, t…