We found that a crude extract from Salvia officinalis (sage) reduced the minimum inhibitory concentrations (MICs) of aminoglycosides in vancomycin-resistant enterococci (VRE). We isolated the effective compound from the extract and identified it as carnosol, one of diterpenoids. Carnosol showed a weak antimicrobial activity, and greatly reduced the MICs of various aminoglycosides (potentiated the antimicrobial activity of aminoglycosides) and some other types of antimicrobial agents in VRE. Carnosic acid, a related compound, showed the similar activity. The effect of carnosol and carnosic acid with gentamicin was synergistic.
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Univ Hosp Maastricht, Dept Med Microbiol, NL-6202 AZ Maastricht, NetherlandsUniv Hosp Maastricht, Dept Med Microbiol, NL-6202 AZ Maastricht, Netherlands
Jonkers, D
Sluimer, J
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Univ Hosp Maastricht, Dept Med Microbiol, NL-6202 AZ Maastricht, NetherlandsUniv Hosp Maastricht, Dept Med Microbiol, NL-6202 AZ Maastricht, Netherlands
Sluimer, J
Stobberingh, E
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Univ Hosp Maastricht, Dept Med Microbiol, NL-6202 AZ Maastricht, NetherlandsUniv Hosp Maastricht, Dept Med Microbiol, NL-6202 AZ Maastricht, Netherlands
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Univ Hosp Maastricht, Dept Med Microbiol, NL-6202 AZ Maastricht, NetherlandsUniv Hosp Maastricht, Dept Med Microbiol, NL-6202 AZ Maastricht, Netherlands
Jonkers, D
Sluimer, J
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Univ Hosp Maastricht, Dept Med Microbiol, NL-6202 AZ Maastricht, NetherlandsUniv Hosp Maastricht, Dept Med Microbiol, NL-6202 AZ Maastricht, Netherlands
Sluimer, J
Stobberingh, E
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Univ Hosp Maastricht, Dept Med Microbiol, NL-6202 AZ Maastricht, NetherlandsUniv Hosp Maastricht, Dept Med Microbiol, NL-6202 AZ Maastricht, Netherlands