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Table 3 Minimum inhibitory concentration (MIC) and minimum bacterial concentration (MBC) of three isolated sub-fractions against Staphylococcus aureus ATCC 25923 and Streptococcus mutans Ingbritt 1600.

From: Bioassay guided purification of the antimicrobial fraction of a Brazilian propolis from Bahia state

Sample

Staphylococcus aureus ATCC 25923

Streptococcus mutans Ingbritt 1600

 

MIC (μg/mL)

MBC (μg/mL)

MIC (μg/mL)

MBC (μg/mL)

Sub-fraction 1

1.5–3.1

26–53

3.1–6.25

53–106

Sub-fraction 2

> 210

> 210

> 210

> 210

Sub-fraction 3

> 210

> 210

> 210

> 210

Positive control*

1.5–3.1

3.1–6.25

0.75–1.5

1.5–3.1

  1. *Positive control: digluconate chlorhexidine 0.12% – Sigma®.
  2. Experiments carried out in triplicate.