The effect ofAeromonas hydrophilainfection on the non-specific immunity of blunt snout bream ( Megalobrama amblycephala )

Central European Journal of Immunology

关键词: Blunt snout bream (Megalobrama amblycephala);    Aeromonas hydrophila;    SOD;    Catalase activity;    lysozyme activity;    non-specific immunity;   

DOI  :  10.5114/ceji.2017.70965

来源: DOAJ

【 摘 要 】

Aeromonas hydrophilais the main reason of epidemic septicaemia for freshwater fish. In the present study, the effect ofAeromonas hydrophilainfection on the non-specific immunity of blunt snout bream ( Megalobrama amblycephala ) was studied. AfterAeromonas hydrophilachallenge, lysozyme activity was significantly increased at 4 h, 1 d, 3 d, 5 d, 14 d and 21 d. An increased level of lysozyme activity indicated a natural protective mechanism in fish. The significant increases of superoxide dismutase activity and catalase activity in treatment group were detected at 4 h, 1 d, 3 d, 5 d, 14 d and 21 d afterAeromonas hydrophilachallenge. Increase in the superoxide anion and H 2 O2 is considered to be beneficial for self-protection from disease. Acid phosphatase activity increased significantly at 1 d, 3 d and 5 d afterAeromonas hydrophilachallenge. Alkaline phosphatase activity in treatment group showed significant increase at 4 h, 1 d, 3 d, 5 d, 14 d and 21 d compared to control group. Increased phosphatase activity indicates higher breakdown of the energy reserve, which is utilized for the growth and survival of fish. These results revealed that the non-specific immunity of fish played an important role in self-protection after pathogens infection.

【 授权许可】

Unknown