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Table 2 Inhibition zone (mm) of essential oils against MDR bacteria at AAU, 2018

From: Combined antibacterial effect of essential oils from three most commonly used Ethiopian traditional medicinal plants on multidrug resistant bacteria

Medicinal plant Con (μl/ml) μl/disc Gram positive Gram negative
MSSA MRSA E. coli K. pneumoniae
R S R S
T.schimper 100 10 16 ± 0.9 16 ± 0.4 11 ± 0.4 10 ± 0.7 17 ± 0.4 17 ± 1.2
100 20 21 ± 0.6* 21 ± 0.3 17 ± 0.4 13 ± 0.1 24 ± 0.2# 24 ± 1.0
B. cuspidata 100 10 19 ± 0.3 19 ± 0.2 15 ± 1.3 11 ± 0.3 19 ± 0.3 18 ± 0.2
100 20 22 ± 0.6* 25 ± 0.1 19 ± 0.8 15 ± 0.1 23 ± 0.3# 23 ± 0.9
B. ogadensis 100 10 13 ± 0.8 12 ± 0.1 9 ± 0.2 8 ± 0.7 17 ± 0.9 17 ± 0.3
100 20 19 ± 0.8 17 ± 0.3 14 ± 0.2 14 ± 0.2 20 ± 0.6 21 ± 0.9
Positive control Cefoxitin S R
Gentamicin R S R S
Ceftriaxone R S R S
Negative control (5% DMSO) N N N N N N
  1. The values represent mean ± standard deviation, N NO inhibition zone, R Resistant (≤16 mm IZ), S Susceptible (≥ 21 mm IZ). Where, *P < 0.05when compared to cefoxitin treated MRSA. While, #P < 0.05 when compared to modern drug treated K. pneumoniae