LINC01554 and infection: In both co-infections with a WT strain (Fig 5A and 5B) and in single-strain infections (Fig 5C and 5D), the ΔdusB-fis mutant colonized tissue sites and grew for the first 24 hours post-infection with kinetics similar to WT Yptb. However, by 48 hours post-infection, the level of ΔdusB-fis failed to increase as rapidly as WT, indicating that the growth of this strain was not restricted until after initial seeding and expansion in tissue sites.