We included four groups of mice: (i) Slpi+/+ mice undergoing mock-infection (M-wt), (ii) Slpi+/+ mice infected with UTI89 (I-wt), (iii) Slpi−/− mice undergoing mock infection (M-ko), and (iv) Slpi−/− mice infected with UTI89 (I-ko). This evidence concerns the gene SLPI and infection.