7,10-dihydroxy-8(E)-Octadecenoic acid is a hydroxy fatty acid and metabolite of oleic acid that is produced byP. aeruginosafrom vegetable oils.1It is active against the food-borne pathogenic bacteriaS. aureus,S. typhimurium,L. monocytogenes,B. subtilis, andE. coli(MIC50s = 31.3, 125, 125, 62.5, and 250 μg/ml, respectively), as well as the plant pathogenic bacteriaErwinia,R. solanacearum,C. glutamicum, andP. syringae(MIC90s = 125, 125, 250, and 500 μg/ml, respectively).2,1