Screening of essential oils activity against a gram negative psychrophilic bacterium isolated from aquatic environment (Water & Biofilm)

Among the applications of medicinal plants, it is their use as antimicrobial agents. The objective this study was to investigate effect some essential oils against an etiological pathogen Flavobacterium spp. responsible for several lost in rainbow trout, ( Oncorhynchus mykiss ) hatcheries, strains used were isolated from rearing tanks water and biofilm, identified based on phenotypic, biochemical enzymatic characterizations. A collection eight extracted, analyzed tested inhibitory activity strains, bacterium has been demonstrated by aromatogram method a screening bacterial growth solid medium culture with disks containing oils. Our study’s results show that chemical composition extracted play crucial role antibacterial activity, which varies 6 mm up 34 maximal diameter.