Kinetic analysis of urine and feces after infection with UPEC. C57BL/6 mice were infected with UTI89 (M1 to M5) or UTI89 SR (M6 to M15), and bacterial titers in urine (▪) and feces (□) samples were determined every other day for 6 weeks (42 days). Five mice were together in each cage with M1 to M5 (cage 1), M6 to M10 (cage 2), and M11 to M15 (cage 3). M10 was not infected with UTI89 SR. ✽, No urine collected; ♦, no feces collected.