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Adhesion abilities of protease-positive and -mutant strains of GAS
| Strain | Proteolytic activitya | Adhesionb (108 CFU/ml) |
|---|---|---|
| A-20 | + | 4.88 ± 0.13 |
| SW507 | − | 6.20 ± 0.21 |
| NZ131 | + | 3.13 ± 0.34 |
| SW510 | − | 5.39 ± 0.47 |
The proteolytic activity was determined by use of a casein plate. +, activity; −, no activity.
Adhesion ability was assayed as described in the text. Results are means ± standard errors of the means of three experiments.
