Determination of Effectiveness of Antibacterial Treatment in Rainbow Trout Against Vagococcosis

Vagococcosis caused vagococcus salmoninarum in rainbow trout (oncorhynchus mykiss) in seen in ourcountryand it is a disease that causes economic losses. this study aimed to determine the choice of treatment with antibacterial drugs of vagococcosis. for this purpose, of 5 groups were formed using the rainbowtrout weighing 150 g. fish in all groups were experimentally infected with v. salmoninarum. following bacterial injection into fish, erythromycin (100 mg / kg body weight / day), florfenicol (10 mg / kg body weight / day), doxycycline (20 mg / kg body weight / day) and amoxicillin (80 mg / kg body weight / day) were added to the fish feed with vegetableoil. only vegetableoil was added to the feed of the control group. mortalities were recorded during and after treatment in each group and bacteriological examination was performed using triptic soy agar. when considered the clinical signs, mortality rates and reisolations percent in all groups, erythromycin and amoxicillin could not displayed enough efficacy. the florfenicol and doxycycline showed much higher activity to control the infection.