title: Antibiotic action of beta-ursolic acid.
abstract: The antimicrobial action of beta-ursolic acid (triterpenoid sapogenin from the ursan group) has been studied. At the concentration of 300 mug/ml, this substance inhibited growth of all strains of staphylococci investigated. MIC for Gram-positive bacteria ranged between 50 and 500 mug/ml, and 100 to 800 mug/ml for Gram-negative bacteria and yeasts. Acquired resistance to beta-ursolic acid was transient.
mesh_terms: D000900:Anti-Bacterial Agents; D000890:Anti-Infective Agents; D001419:Bacteria / Q000187:drug effects*; D004341:Drug Evaluation; D004352:Drug Resistance, Microbial; D014315:Triterpenes / Q000494:pharmacology*; D015003:Yeasts / Q000187:drug effects*
chemical_list: D000900:Anti-Bacterial Agents; D000890:Anti-Infective Agents; D014315:Triterpenes