Pathophysiological Changes in Response to the Pathogens Administered to Healthy Etroplus maculatus (Teleostei: Cichlidae) and Puntius ticto (Teleostei: Cyprinidae)

The pathogens in fish generate alterations in physiology of fish with consequences in life function decreasing and death. Objective. To analyzed the response of ornamental fish Etroplus maculatus (Teleostei: Cichlidae) and Puntius ticto (Teleostei: Cyprinidae) infected by Pseudomonas aeruginosa (PSA1) and Enterobacter cloacae (EMS1). Methods. Strains of bacteria Pseudomonas aeruginosa (PSA1) and Enterobacter cloacae (EMS1) were obtained from moribund individuals of Etroplus maculatus (Teleostei: Cichlidae) and Puntius ticto (Teleostei: Cyprinidae), also hemaglobin, hematocrit, erythrocyte, and hemoglobin in an erythrocyte, oxygen consumption and ammonium excretion, and histological studies were measured. Results. Hematological parameters (hemaglobin, hematocrit, erythrocyte, hemoglobin in an erythrocyte) denoted an inverse relation with bacterial infection for both species, which was supported by high oxygen consumption, high ammonium excretion, and cell damage showed using histological analysis. Conclusions. These results are similar to observations for inland water and marine fish under culture conditions. The artificial infection of two fish species with two pathogen bacteria generates effects in pathophysiology and can be used for the development of treatment approaches.