TABLE 3.
Comparison of virulence of the various 24067A colony types
| Phenotype | na | Lung CFUb | Histologyc
|
Pe (phenotypes) | |
|---|---|---|---|---|---|
| Inflammation | GXM | ||||
| SM | 4 | 2.74 ± 0.86 | ± | ± | 0.035 (SM versus WR2) |
| WR2 | 3 | 4.75 ± 0.07 | +++ | +++ | |
| SM | 3 | 2.40 ± 0.53 | ± | ± | 0.06 (SM versus PH) |
| PH | 4 | 2.68 ± 0.79 | +d | + | 0.177 (PH versus RSM-PH) |
| RSM-PH | 3 | 3.49 ± 0.47 | + | + | 0.627 (RSM-PH versus SM) |
| WR1 | 3 | 4.81 ± 0.45 | +++ | +++ | 0.019 (WR1 versus RSM-WR) |
| RSM-WR1 | 4 | 3.97 ± 0.2 | + | + | |
a
n, number of rats in each experiment.
b
Log CFU per gram of lung tissue ± standard deviation.
c
Histology scores: ±, none or minimal; +, minimal; ++, moderate; +++, extensive.
d
Two rats had no evidence of infection, and two rats had minimal inflammation.
e
The P value was determined by the Student t test.