Effect of different therapeutic baths of potassium permanganate (KMnO4) and copper sulfate (CuSO4.5H2O) on bacterial and fungal load on skin and gill and histopathology of gills in Acipenserruthenus

The present study was planned to investigate the effect of different baths copper sulfate and potassium permanganate on bacterial and fungal flora of the skin and gill tissue of Acipenser ruthenus. The study was do neat the center of the culture and propagation of sturgeon stocks Doctor Shahid Beheshtiin1393. For this research, a hundred and five fish were divided with average weight of 41.83±2.85 gr and average length of 23.67±0.48cm.The tank was used with a volume of 40 liters of water. Treatments with concentrations of copper sulfate 2 mg/lit (bathroom of long-term, 12 hours), 5 mg/lit (for short-term ratings, 5-10 minutes), 10 mg/lit (bath of immersion, 30-45 seconds) and potassium permanganate concentrations 1 mg/lit (bath of long-term, 12 hours), 2 mg/lit (for short-term ratings, 5-10 minutes), 3 mg/lit (bath of immersion, 30-45 seconds) and the last group "no matter sterilization" served as a control were done. Bacterial and fungal results showed a statistically significant difference between treatment and control group, in 2 and 3 mg/lit doses decreased the fungal flora of the skin and gills. Also the copper sulfate in 10 mg/lit and 5 mg/lit concentrations reduced the bacterial flora on the skin. Gill histopathology results showed, side effects were seen such as hyperemia, hemorrhage, necrosis, sticking string secondary, wide and erosion of primary lamellae, hyperplasia, separation of the epithelium layer of secondary fibers, sickle and clubbing field. Severity of symptoms in the treatment of 3 mg/lit potassium permanganate and 10 mg/lit of copper sulfate were more than other treatments. According to the results of the sterilization method, sterlet short-term (10 minute) is recommended for both materials.