Phage plaques and autoplaques in Pseudomonas aeruginosa strains.

Studies were made on the morphological variety in plaques produced by phage lysis and autoplaques in Pseudomonas aeruginosa strains. The great variability of phage plaque morphology may lead to a confusion with the autoplaques produced spontaneously by P. aeruginosa strains. The production of autoplaques is characteristic of a large number of clinical strains of P. aeruginosa. The appearance of autoplaques may complicate analysis of significant clinical strains of P. aeruginosa.