FIG. 3.

Colonization and persistence in spleens over 3 weeks by Y. enterocolitica Δyop mutants and WA-C(pYV::CM) after oral infection of C57BL/6 mice with 10⁸ CFU. Asterisks indicate death of mice between days 7 and 12 postinfection. ΔyopQ, -H, and -M mutants were below the limit of detection (10 CFU/organ). Values indicate the average log CFU per organ for six mice.