Abstract: Blood parameters are useful for the measurement of haematological disturbances in parasitized fishes and provide information about the disorders in the host. So, the present investigation was carried out to study the effects of parasite on the blood or blood cells of a freshwater fish, Channa punctatus; collected from ponds of Morigaon district, Assam, India. Twenty five fishes (ten fishes collected from unpolluted fish pond and fifteen fishes collected from a domestic sewage-fed pond) were examined for parasites and their effects on blood. Two trypanosoma species (Trypanosoma elongatus and Trypanosoma sauli) were found in the fishes collected from sewage-fed pond. The haematological manifestation of the infected Channa punctatus (host) showed remarkable decrease in haemoglobin content by -19.402%, red blood cells by -20.883% and white blood cells by -8.042%. Differential leucocytes count was also performed and found that neutrophils, lymphocytes, monocytes, eosinophils and basophils of infected fishes were remarkably reduced to 33%, 55%, 1%, 0% and 0% respectively, compared to uninfected fishes. Haemoglobin content significantly reduced to 7.02±3.24g/dl, red blood cells to 1.97±2.62(106mm3), neutrophils to 33.00±2.56(%) and lymphocytes to 55.00±3.11(%). Morphological changes in the blood cells caused by parasitic invasion observed in the infected fishes reflected tissue damages like deformation of blood cells and nucleus, distorted shape of cell, ameboid nucleus, condense cytoplasm, vacuolated cells, blood cell membrane breakage, elongated cell and nucleus and displaced nucleus in WBC. Infected fishes showed weak body, dull body colour and anemia. Micronuclei were not observed in the present study. In our experiment no changes were observed in different blood parameters of uninfected fishes.
Keywords: Blood parasites, Haematological alterations, Channa punctatus.
Title: PARASITE INDUCED ALTERATIONS ON SOME HAEMATOLOGICAL PARAMETERS OF A FRESHWATER FISH, CHANNA PUNCTATUS COLLECTED FROM PONDS OF MORIGAON DISTRICT, ASSAM
Author: Dr. Bhagyashree Mahanta, Hena Parbin, Rijuana Ahmed, Dr. Abdul Q. Osmani, Dr. Bodheswar Kalita
International Journal of Life Sciences Research
ISSN 2348-313X (Print), ISSN 2348-3148 (online)
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