Ratio | Spleen | Liver |
---|
33676/SL1344 | <5 x 10−8
| < 7 x 10−8
|
YU39/SL1344 | < 5 x 10−8
| < 8 x 10−7
|
ΔssrB /SL1344 | < 8 x 10−8
| < 3 x 10−8
|
-
a CI values lower than 1 indicate virulence attenuation. For most mice no bacteria were detected for strains 33676, YU39 and ΔssrB; thus, the values showed represent the lower detection limit for these assays