ABSTRACT The chemical composition of the essential oils of Mentha arvensis and Mentha piperita and their antimicrobial activity against twelve Aeromonas spp. isolates from tambaquis (Colossoma macropomum), an important native farmed fish species in Brazil, were evaluated. The oils were characterized using gas chromatography and mass spectrometry (GC/MS) and their antimicrobial activity was evaluated through the microdilution method. The essential oils of these Mentha species mainly comprised oxygenated monoterpenes (97.1% for M. arvensis and 86.2% for M. piperita) and menthol was the major compound of these oils (86.1% for M. arvensis and 33.8% for M. piperita). It was confirmed that these oils had antimicrobial activity against 12 isolates of Aeromonas spp., with minimum inhibitory concentration (MIC) and minimum bacterial concentration (MBC) ranging from 1,250 to 16,666.7 μg mL−1. Better antimicrobial activity was achieved by the M. arvensis essential oil.

中文翻译：

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薄荷属精油的组成及其对气单胞菌属的抗菌活性。

摘要 薄荷和胡椒薄荷精油的化学成分及其对十二种气单胞菌的抗菌活性。对来自巴西重要的本地养殖鱼类 tambaquis (Colossoma macropomum) 的分离株进行了评估。使用气相色谱和质谱 (GC/MS) 对油进行表征，并通过微量稀释法评估其抗菌活性。这些薄荷属的精油主要包含含氧单萜（M. arvensis 97.1% 和 M. piperita 86.2%），薄荷醇是这些油的主要化合物（M. arvensis 86.1% 和 M. piperita 33.8%） . 经证实，这些油对 12 种气单胞菌属具有抗菌活性，最低抑菌浓度 (MIC) 和最低细菌浓度 (MBC) 范围为 1,250 至 16,666.7 μg mL-1。M. arvensis 精油获得了更好的抗菌活性。