TABLE 2.
Virulence of SPI2 mutant Salmonella serovar Typhimurium for mice
| Genotype of: | Log10 CIa | |
|---|---|---|
| Strain 1 | Strain 2 | |
| Wild typeb | Wild typec | 0.00 ± 0.09 |
| ssaT | Wild typec | −2.32 ± 0.18 |
| ΔspiC | Wild typec | −2.31 ± 0.22 |
| ΔspiC | ssaT | −0.04 ± 0.04 |
a
Ratio of the number of strain 1 to strain 2 bacteria recovered from infected spleens removed 2 days after the intraperitoneal injection of 105 total bacteria into mice. The mean log10 CIs from the infection of at least eight mice are reported with corresponding standard deviations.
b
Wild-type chloramphenicol-resistant strain CS401, parent strain for both the ssaT and ΔspiC strains.
c
Wild-type kanamycin-resistant strain CS600, isogenic to CS401.