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Table 4 Antimicrobial activity of the EO against biofilms (72 h) and MBC/MFC:MIC ratio

From: Action of essential oils from Brazilian native and exotic medicinal species on oral biofilms

  Microorganisms
Medicinal species C. albicans CBS 562 F. nucleatum ATCC 25586 P. gingivalis ATCC 33277 S. sanguis ATCC 10556 S. mitis ATCC 903
  MIC MFC Ratio MIC MBC Ratio MIC MBC Ratio MIC MBC Ratio MIC MBC Ratio
A. gratissima 0.500 * ND 0.500 0.500 1:1 0.125 * ND 0.500 1.000 2:1 0.250 0.500 2:1
F 4 AG 0.500 * ND 0.250 1.000 4:1 0.500 * ND 0.500 0.500 1:1 0.250 * ND
C. sativum 0.250 1.000 4:1 0.250 * ND 0.500 * ND 0.500 * ND 0.500 * ND
M. glomerata 0.500 0.500 1:1 0.250 * ND 1.000 * ND 0.500 * ND 0.500 * ND
F 4 MG 1.000 1.000 1:1 0.500 1.000 2:1 * * ND 0.500 0.500 1:1 0.500 * ND
C. articulatus 0.250 0.250 1:1 0.250 0.500 2:1 0.250 0.500 2:1 0.250 0.500 2:1 0.500 1.000 2:1
F 4 CA 1.000 * ND 0.250 * ND * * ND 0.500 0.500 1:1 0.500 * ND
L. sidoides 0.500 1.000 2:1 0.500 1.000 2:1 0.500 * ND 0.250 0.500 2:1 0.500 * ND
F 2 LS 0.500 * ND 0.250 1.000 4:1 0.250 * ND 0.250 0.500 2:1 0.500 * ND
Nystatin 1.000 * ND - - - - - -    - - - -
Chlorhexidine - - - 0.015 0.125 8:1 0.015 0.125 8:1 0.015 0.015 1:1 0.015 0.062 4:1
  1. *Fungicidal/bactericidal action: MIC > 1 mg/mL.
  2. ND- Not determined.
  3. Ratio: MBC:MIC or MFC:MIC between 1:1–2:1 - bactericidal or fungicidal effect, while ratio >2:1 -a bacteriostatic or fungistatic effect.