Abstract:

The aim was to assess the role of microorganism in the process of death of the Procambarus clarkia infected with WSSV (white spot syndrome virus). The P. clarkia was infected with WSSV with antibiotics. The number of bacteria in crayfish hemolymph and bacterial species were compared and identified. The results showed that antibiotics reduced the mortality rate of crayfish infected with WSSV but had no significant effect on the proliferation of WSSV. The number of microorganisms in hemolymph of P. clarkia infected with WSSV had increased significantly. The microorganisms were Aeromonas hydrophila, Citrobacter freundii, Stenotrophomonas maltophilia and Acinetobacter junii. The results showed that the disappearance of the blood cells of P. clarkia infected with WSSV in vivo led to a substantial increase of pathogenic microorganisms, which accelerated the death rate of P. clarkia.