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The proteolytic activities of the extracellular proteases produced from S. aureus on BCG-skim milk agar plates: A, B, C, and D.
| Plate | Colony diameter (mm) | Colony diameter + halo (mm) | P z value | Reference Pz value | Proteolytic activity |
|---|---|---|---|---|---|
| A | 10 | 16 | 0.62 < 0.69 | Very strong | |
| B | 11 | 13 | 0.84 | 0.80–0.89 | Mild |
| C | 8 | 8.5 | 0.94 | 0.90–0.99 | Weak |
| D | — | — | — | — | — |
P z value is the ratio of the diameter of the colony to the total diameter of the colony plus the zone of hydrolysis.
