Pseudomonasis is infectious disease of warm water, cool water and aquarium fishes occurring in pond and industrial fish-farming establishments. Pathogens of pseudomonasis are virulent isolates of bacteria of the orderly of pseudomonasis. Ps.putida, ps.aureofaciens, ps.intestinalis, ps.anguilliseptica, ps.chlororaphis are more wide-spread. Each of the afore-mentioned species can cause original disease, in association with each other or other micro-organisms. The document consists of 6 sections. S