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. Author manuscript; available in PMC: 2021 Jun 1.

Published in final edited form as: Mol Oral Microbiol. 2020 Feb 21;35(3):106–119. doi: 10.1111/omi.12281

Table 1:

Zone of inhibition (ZOI) for various antimicrobials

Antibiotics^$	Zone of inhibition diameter (mm)
Antibiotics^$	LRB	RB3S
Bacitracin (10 mcg)	18.0 ± 1.0	18.0 ± 1.0
Chloramphenicol (5 mcg) ^*	17.5 ± 1.2	11.8 ± 0.4
Ciprofloxacin (5 mcg)	18.5 ± 0.5	18.0 ± 1.0
Clindamycin (2 mcg) ^*	25.8 ± 1.6	20.5 ± 0.5
Doxycycline (30 mcg)	36.3 ± 5.4	37.0 ± 5.8
Erythromycin (15 mcg) ^*	34.0 ± 2.2	26.8 ± 1.7
Kanamycin (125 mg/ml) ^*	15.0 ± 1.0	13.5 ± 1.0
Linezolid (30 mcg) ^*	32.5 ± 2.2	30.0 ± 2.3
Meropenem (10 mcg) ^*	19.5 ± 1.1	16.2 ± 0.9
Mezlocillin (75 mcg) ^*	41.2 ± 2.0	46.3 ± 3.8
Neomycin (30 mcg) ^*	9.8 ± 0.7	8.8 ± 0.7
Nisin (40 mg/ml)	12.0 ± 0.5	13.0 ± 1.0
Puromycin (10 mg/ml)	14.0 ± 2.0	14.2 ± 1.8
Rifampin (5 mcg)	27.5 ± 0.5	27.0 ± 0.0
Spectinomycin (50mg/ml) ^*	20.5 ± 0.5	17.5 ± 0.5
Streptomycin (50mg/ml)	20.0 ± 0.5	21.5 ± 0.5
Tetracycline (10 mg/ml) ^*	34.0 ± 1.0	40.0 ± 2.0
Tigecycline (15 mcg) ^*	35.1 ± 3 .0	38.0 ± 3.2

^$

, per disc (mcg);

^*

, significant difference