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Table 1 MICs a a n d MLCs b of essential oils against antibiotic resistant and sensitive strains of H. ducreyi

From: Assessing the antibiotic potential of essential oils against Haemophilus ducreyi

  E. caryophyllus C. verum T. satureioides
Organism MIC MLC MIC MLC MIC MLC
H. ducreyi       
35000HP 0.104 0.260 0.103 0.260 0.460 0.460
HMC112 0.050 0.104 0.103 0.260 0.230 0.230
HMC46c 0.050 0.104 0.520 0.520 0.230 0.460
HMC48c 0.104 0.104 0.260 0.520 0.230 0.230
HMC56c 0.050 0.104 0.260 0.260 0.230 0.460
HMC88c 0.104 0.104 0.260 0.260 0.230 0.460
HMC49c 0.104 0.104 0.260 0.260 0.460 0.460
HMC53c 0.104 0.260 0.260 0.260 0.230 0.230
CIP542ATCC NDd NDd 0.050 0.050 NDd NDd
Controls       
E. coli 2.6 2.6 25.8 25.8 4.6 4.6
S. aureus 2.6 2.6 10.3 25.8 4.6 4.6
P. aeruginosa 5.2 10.4 5.2 5.2 9.2 9.2
L. reuteri ≥2.6 ≥2.6 5.2 10.3 4.6 4.6
  1. MIC and MLC are reported in mg/mL. For all strains shown, n = 3.
  2. aMinimum inhibitory concentration (MIC) is the lowest concentration of oil-infused agar on which no growth occurred.
  3. bMinimum lethal concentration (MLC) is the concentration of oil-infused agar from which no growth occurred after transfer to fresh agar without essential oil.
  4. cDenotes resistance to penicillin, tetracycline, kanamycin, and chloramphenicol.
  5. dNot done; due to the extremely fastidious growth requirements of this strain, sufficient growth was not obtained to determine the MIC and MLC for these oils.