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Abstract
Indian major carp, Cirrhinus cirrhosus was considered to monitor culture and health status in farm condition from
Bhaluka and Muktagacha of Mymensingh region of Bangladesh for a period of seven months starting from
September, 2010 to March, 2011. Monthly sampling was carried out for growth and health condition. Samples of skin
and muscle, gill, liver and kidney were observed by clinical and histological techniques. Water temperature was at
unfavorable levels but, dissolved oxygen, pH, alkalinity, ammonia and nitrite of water were within the favorable range
for fish culture during the months of December and January. Clinically weak body, rough skin, scale loss, thick gill
filaments, ulcer and gray brownish color were observed. Among the affected fish organs like skin, muscle and gill
were found to be more affected than those of the internal organs, liver and kidney. Major pathologies in the skin and
muscle were loss of epidermis and dermis, presence of fungal granuloma, fungal hyphae, necrosis, hemorrhages,
vacuums and melanocytes. Protozoan cysts, clubbing, hemorrhages, necrosis and hypertrophy were found in the gill.
Necrosis, hemorrhage, pyknosis and vacuums were observed in liver. Common pathological signs like necrosis,
hemorrhage, pyknosis, vacuums and degenerated kidney tubules were noticed in kidney. Overall, in the clinical and
histopathological studies fishes were found to be more affected during the colder months i.e., December and
January. Whereas, in the month of February the pathological condition of fish gradually started to heal up. In
histopathological observation, fishes of Bhaluka farms were more affected than that of Muktagacha fish farms.
Epizootic ulcerative syndrome (EUS) and protozoan diseases were noticed in Bhaluka fish farms