Enhancing effect of A5/L phages on S. aureus -specific antibodies in cyclophosphamide-treated and infected mice. Mice were given CP (200 mg/kg b.w.). After four days the phages 1 × 106 and bacteria (5 × 106) were administered. The mice were bled for the measurement of antibody titer 21 days later. The number of mice was 10 per group. Statistics: CP-P-B- vs CP-P-B+ P = 0.0495; CP-P-B+ vs CP+P-B+ P = 0.0369; CP+P-B+ vs CP+P+B+ P = 0.0001 (ANOVA of Kruskal-Wallis; P = 0.0000).