• Dr. Pratibha Pathak
• Ajay Kumar Anand

The current study examines the parasitic effects of Thelohanellus sp. a myxosporean parasites on Indian major carps. Only symptomatic and moribund samples of diseased fishes comprised of fry/fingerlings and adults of IMC were collected and were brought to the laboratory for patho-morphological and patho-anatomical examinations. Photomicrographs of the most characteristic regions of histopathological lesions in the stained tissues of diseased fish samples were taken.Examination of cysts in smear preparations confirmed the nature of the parasitic spores which were oblong and spindle shaped. Gross pathology revealed body emaciation and anaemia. Such cyst formation in the skin induced severe histiopathological lesions in the dermal layer the damage caused by the parasites in the skin of the affected fishes was sufficient enough to cause mortality in them because of the restriction of the respiratory surface areas. The myxozoan parasite was observed predominantly in the nursery and rearing ponds. Fry, fingerlings, juveniles and adults of Catla and mrigal were found highly susceptible to this disease than rohu.

Catla, histopathology, Thelohanellus, Myxobolus,. .

"Histopathological observations on Thelohanellosis in Indian major carp ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.7, Issue 10, page no.2998-3006, October-2020, Available :http://www.jetir.org/papers/JETIR2010394.pdf

"Histopathological observations on Thelohanellosis in Indian major carp ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.7, Issue 10, page no. pp2998-3006, October-2020, Available at : http://www.jetir.org/papers/JETIR2010394.pdf