ST64B is a defective bacteriophage in Salmonella enterica serovar Typhimurium DT64 that encodes a functional immunity region capable of mediating phage-type conversion.

The Salmonella enterica subsp. enterica serovar Typhimurium (S. Typhimurium) defective bacteriophage ST64B has a putative immunity (immC) region consisting of cI, cro and cII-like genes.

Genomic structure of the Salmonella enterica serovar Typhimurium DT 64 bacteriophage ST64T: evidence for modular genetic architecture.

The complete sequence of the double-stranded DNA genome of a serotype-converting temperate bacteriophage, ST64T, was determined. The 40,679-bp genomic sequence of ST64T has an overall GC content of 47.5% and was reminiscent of a number of lambdoid phages, in particular, P22.