FIG. 3.

Delayed phage treatment of bacteremic mice. A single i.p. injection of the highest dose of the phage preparation (3 × 10⁹ PFU) was administered to bacteremic mice at the indicated times after bacterial challenge. The mice were scored for their state of health as described in the text. Black and gray bars show their condition at the time of phage treatment and following phage treatment, respectively. When treatment was delayed for 24 h, all the animals were moribund, but approximately half of them not only survived but also went on to recover completely as a result of the single dose of phage.