Reversion of Transduced Antigenic Characters in Salmonella typhimurium

Abstract

SUMMARY: A strain of Salmonella typhimurium, in which the H antigens had been altered by transduction with a baeteriophage lysate of S. abony to the form b ↔ enx has been found to revert in the first or second phases giving rise to organisms with the structure i ↔ enx and b ↔ 1.2. No reversions in both phases have so far been detected. This phenomenon has been observed only in non-lysogenic strains; lysogenic varieties have remained stable.