RT Journal Article SR Electronic(1) A1 Coetzee, J. X.YR 1963 T1 Transduction of Swarming in Proteus mirabilis JF Microbiology, VO 33 IS 1 SP 1 OP 7 DO https://doi.org/10.1099/00221287-33-1-1 PB Microbiology Society, SN 1465-2080, AB SUMMARY: A phage able to transduce a streptomycin resistance marker in Proteus mirabilis can also separately transduce the swarming characteristic between variants of two strains of P. mirabilis. Motile non-swarming variants were made to swarm on agar by incorporation of a swarming gene via a phage lysate of a swarming strain. The production of swarms by motile non-swarming variants when treated with phage lysates of other pheno-typically similar strains indicated that at least three non-homologous factors control swarming. An O variant could also act as a donor of the swarming gene. This is because the O strain possesses an intact swarming centre which is masked by the absence of active flagella. This O variant was transduced to swarming by phage lysates of motile non-swarming strains or of a swarming strain. The gene transduced here was concerned with the presence of flagella. Factors controlling two morphological varieties of swarming were separately transduced to suitable recipients and a locus able to modify wild-type swarms was identified., UL https://www.microbiologyresearch.org/content/journal/micro/10.1099/00221287-33-1-1