[Objective] The aim was to quickly find high free drugs to prevent Hemibarbus maculates Bleeker from dying. [Method] The conventional biochemical methods and molecular biological identification method was used to do t...[Objective] The aim was to quickly find high free drugs to prevent Hemibarbus maculates Bleeker from dying. [Method] The conventional biochemical methods and molecular biological identification method was used to do the isolation and identification of bacteria from H. maculates, and agar diffusion method was used for the susceptibility test and in vitro becteriostasis experiment. The toxins were detected using the plate method, and the intraperitoneal injection method was used to do animal experiments. [Result] Twelve strains of isolated bacteria were obtained, which could uniformly decompose glucose, maltose, but were unable to break down lactose, and they could reduce the nitrate, and were negative in hydrogen sulfide and indole. A clear band was found in 685 bp of the isolated bacteria. And the isolated bacterial all generated hemolysins. Some strains produced protease. The isolated bacterial were resistant to penicillin G, amoxicillin, but sensitive to gentamicin, ciprofloxacin, and could be inhibited by the Bacillus amyloliquefaciens. All experimental animals died within 12 hours. [Conclusion] The 12 isolates were Aeromonas veronii, Aeromonas caviae and Aeromonas hydrophila, respectively, and the deaths of H. maculates were caused by the mixed infection of Aeromonas veronii, Aeromonas caviae and Aeromonas hydrophila. The first choice drug for the treatment was ciprefloxacin, and Bacillus amyloliquefeciens could be used as the drug for ecological prevention and control.展开更多
基金Supported by the Cooperation Project(09003699)the Project of the Ministry of Education of Jiangxi Province(GJJ150416)the Project of the Ministry of Science and Technology of Jiangxi Province(20122BBF60082)~~
文摘[Objective] The aim was to quickly find high free drugs to prevent Hemibarbus maculates Bleeker from dying. [Method] The conventional biochemical methods and molecular biological identification method was used to do the isolation and identification of bacteria from H. maculates, and agar diffusion method was used for the susceptibility test and in vitro becteriostasis experiment. The toxins were detected using the plate method, and the intraperitoneal injection method was used to do animal experiments. [Result] Twelve strains of isolated bacteria were obtained, which could uniformly decompose glucose, maltose, but were unable to break down lactose, and they could reduce the nitrate, and were negative in hydrogen sulfide and indole. A clear band was found in 685 bp of the isolated bacteria. And the isolated bacterial all generated hemolysins. Some strains produced protease. The isolated bacterial were resistant to penicillin G, amoxicillin, but sensitive to gentamicin, ciprofloxacin, and could be inhibited by the Bacillus amyloliquefaciens. All experimental animals died within 12 hours. [Conclusion] The 12 isolates were Aeromonas veronii, Aeromonas caviae and Aeromonas hydrophila, respectively, and the deaths of H. maculates were caused by the mixed infection of Aeromonas veronii, Aeromonas caviae and Aeromonas hydrophila. The first choice drug for the treatment was ciprefloxacin, and Bacillus amyloliquefeciens could be used as the drug for ecological prevention and control.
