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SUMMARY An investigation has been made into lysogenicity and pyocinogenicity in Pseudomonas aeruginosa. The bacteriophages isolated were classified into groups on their antigenic properties and attempts have been made to correlate biological characteristics with this grouping. Multiple lysogeny in some strains is described, including one strain lysogenic for four unrelated phages. Certain of the bacterial strains are lysogenic for a phage having characteristics more typical of a virulent than of a temperate bacteriophage and the relationship of such strains to the isolation of virulent phages from natural sources is discussed. Reference is made to the application of this knowledge of Pseudomonas phages to genetic and epidemiological studies with this bacterium.
Holloway et al. (1960) studied this question.