TABLE 1.
Strain | Minimal no. of bacteria (CFU/ml) causing:
|
|
---|---|---|
MSHA | MR/K-HA | |
K21a | 1.5 × 109 | 3.0 × 109 |
K21a/3 (CPS−) | 2.25 × 106 | 3.0 × 109 |
KPTA 46 (CPS−) | 3.5 × 107 | 3.0 × 109 |
KPTA 47 (CPS−) | 2.25 × 106 | 3.0 × 109 |
KPTA 55 (CPS+, revertant) | 1.5 × 109 | 3.0 × 109 |
K26 | 3.0 × 109 | 7.5 × 108 |
K26/1 (CPS−) | 3.0 × 109 | 4.0 × 108 |
KPTA 50 (CPS−) | 3.0 × 109 | 7.5 × 108 |
KPTA 51 (CPS−) | 3.0 × 109 | 7.0 × 107 |
K36 | 1.5 × 109 | 1.5 × 109 |
K36/3 (CPS−) | 1.5 × 109 | 4.0 × 108 |
KPTA 40 (CPS−) | 1.5 × 109 | 4.0 × 108 |
KPTA 41 (CPS−) | 1.5 × 109 | 3.0 × 109 |
K50 | 4.0 × 108 | 7.5 × 108 |
K50/3 (CPS−) | 2.25 × 106 | 4.0 × 108 |
KPTA43 (CPS−) | 9.0 × 106 | 4.0 × 108 |
KPTA 44 (CPS−) | 2.25 × 106 | 7.0 × 108 |
K2 | 3.0 × 109 | 3.0 × 109 |
KPTA 38 (CPS−) | 3.0 × 109 | 3.0 × 109 |
KPTA 52 (CPS−) | 3.0 × 109 | 3.0 × 109 |
KPTA 53 (CPS−) | 3.0 × 109 | 3.0 × 109 |
K2(K36) | 3.0 × 109 | 3.0 × 109 |
MSHA and MR/K-HA activities were determined using bacteria harvested after 48 h of growth (after four passages) in BHI (for MSHA) or in nutrient broth (for MR/K-HA) or using bacteria harvested after 2 h of growth in LB inoculated with passage 4 bacteria. Values for 48- and 2-h incubations were the same. CPS−, noncapsulated variant.