Essential oil of Mentha suaveolens Ehrh., composition and antibacterial activity against bacterial fish pathogens

In this study, it was determinated the essential oil of cultivated apple mint, Mentha suaveolens Ehrh. composition and in vitro antibacterial activity against 11 fish pathogen bacteria including Gram-positive (Staphylococcus warneri, Staphylococcus sp., Lactococcus garvieae, Vagococus salmoninarum) Gram-negative (Aeromonas hydrophila, Aeromonas sobria cavieae, Vibrio anguillarum, Pseudomonas aeroginosa, Yersinia ruckeri, Edwardsiella tarda) by using agar diffusion assay. The main component M. suaveolence obtained as piperitenone oxide. exhibited strong inhibitory such inhibition zone sizes: 30-50mm at 250-1000 µL mL-1 concentrations V. anguillarum; 16-20mm 31.25-125 P. aeroginosa; 15-18mm 500-1000 A. sobria. However, found to be moderately effective E. tarda (8-15 mm), Y. ruckeri (9-12mm), S. warneri (9-10mm), salmoninarum (9mm) sp. (8-9mm). showed weak cavieae (5-8), hydrophila (6-7mm), L. garvieae (5-7mm). Thus, effect on immune response disease resistance aeroginosa should investigated vivo cultured species future studies.