FIG. 1.

Specific immune response to phages F8, LMA2, DP1 in mice. Purified phages were injected IP, 10¹⁰ pfu per mouse (N = 7), on days 0, 20, and 55 (arrows). Figure legend is given as follows: F8-serum level of F8 phage-specific antibodies in phage-challenged mice, F8 control-serum level of F8 phage-specific antibodies in control mice injected with PBS, LMA2-serum level of LMA2 phage-specific antibodies in phage-challenged mice, LMA2 control-serum level of LMA2 phage-specific antibodies in control mice injected with PBS, P1-serum level of P1 phage-specific antibodies in phage-challenged mice, and P1 control-serum level of P1 phage-specific antibodies in control mice injected with PBS. This experiment was repeated three times, and the exemplary result is presented. IP, intraperitoneally; PBS, phosphate-buffered saline.