Haematological Changes In Fresh Water Fish, Channa striatus Diagnised with the Epizootic Ulcerative Syndrome (EUS)

Present haematological study deals with determination of EUS infection in fresh water fishes of Warangal district. The three lakes selected for study were Dharmasagar, Hasanparthy and Bhandham. From each lake 100 fishes (Channa straitus) of both control and infected were collected for the study. Haematological parameters were estimated in control and infected fishes. Results reveal that in comparison with the control RBC, HB, PCV values in infected fish were decreased by 63.5%, 23%, 55% respectively. Infected fishes had shown an increase in WBC (21%) and MCHC (7.5%) count. Studies also show that MCH and MCV values were found decreased by 8% and 27% in the infected fishes over the control. Differential leucocyte count (DLC) studies in the control fish show that Lymphocytes, Neutrophils, Monocytes, Eosinophils and Basophils values were in the normal percentage range as 52.0±0.71%, 59.6±0.62%, 5.7±0.34%, 2.5±0.37, 2.3±0.26% respectively. In case of infected a drastic reduction of (30.7%) in Neutrophils was observed whereas Monocytes (2.3%) and Basophils (0.6%) were not varied much. A noticeable increase of (1.5%) in eosinophil and (5.4%) in lymphocytes was observed in EUS infected fishes. Thus the above results depict the presence of macrocytic anaemia in the infected fishes of Dharmasagar, Hasanparthy and Bhandham Lakes. High pollution, wide range of native fish species, low temperature have led to poor sanitationof the selected lakes which in turn might cause macrocytic anemia in the infected fishes.