The aims of the present study were to assess effects Hyssop, Hyssopus officinalis , methanolic extract (HE) on growth performance, hepatic oxidative status, humoral and intestinal immunity, bacteria rainbow trout, Oncorhynchus mykiss . Fish allocated into twelve tanks for four treatments, receiving diets containing 0, 100, 250, 500 mg/kg HE eight weeks. results showed that dietary supplementati...

background & aim: by increasing resistance of fish pathogens to chemical drugs, using herbal plants with antimicrobial properties is necessary.in this study, the composition of the essential oil and antimicrobial activity of aerial parts of achillea wilhelmsii c.koch growing wild in zagross mountain (southwest of iran) was analyzed against common bacterial and fungal pathogens of fish. expe...