TABLE 1.

Host ranges and morphologies of the four phages identified in this study^a

^aPhages were isolated from various environments: sewage treatment systems in hospitals, feces of poultry, and stagnant pools. The infectivity (percent) of the phages was calculated based on the host ranges (Fig. 4). Phages exhibited clear plaque morphologies with different diameters in double-agar plates with the P. aeruginosa host. TEM images of phages that were negatively stained by 2% phosphotungstic acid are also shown. Bars at the bottom right, 50 nm.