Group | Clear zone size (mm) | No. of isolates |
Very good producer | ≥15 | 41 (JBST1-JBST8, JBST13, JBST16-JBST19, JBST21-JBST44, JBST49, JBST54, JBST58 and JBST62) |
Good producer | ≥10 | 4 (JBST48, JBST53, JBST55 and JBST65) |
Weak producer | ≥5 | 9 (JBST9, JBST50-JBST52, JBST56-JBST57, JBST59, JBST60 and JBST63) |
Poor producer | <5 | 8 (JBST11, JBST12, JBST14, JBST15, JBST45, JBST47, JBST61 and JBST64) |