The effect of probiotic bacteria isolated from fish intestines of Khuzestan, Bushehr and Hormozgan provinces on oxidative stress system in liver tissue and blood serum of Asian sea bass (Lates calcarifer)

Probiotics are bacteria that in sufficient quantities have beneficial effects on the host. Today, the use of probiotics as food supplements in the aquatic industry has grown exponentially. The aim of this study was to investigate the effect of various probiotics on antioxidant factors in the liver and blood serum of Asian sea bass (Lates calcarifer). For this purpose, Asian bass fish with an initial weight of 171.29±8.79 g, for 60 days using four diets including control group (without bacteria), the first group (selected strain isolated from fish in Khuzestan province), the second group (selected strain isolated from fish of Bushehr province) and the third group (selected strain isolated from fish of Hormozgan province) were fed. Fish sampling was performed on days 0, 30, and 60 of the experiment. The results showed that after 60 days of probiotic use, liver superoxide dismutase levels decreased in all groups and glutathione levels in the second and third groups increased significantly compared to the control group (p<0.05). Also, serum superoxide dismutase levels in all groups and glutathione levels in the first group increased significantly compared to the control group (p<0.05). The results of this study showed that the selected strain isolated from fish in Khuzestan, Bushehr, and Hormozgan provinces can improve the antioxidant indices of the liver and serum of Asian seabass.