Histology and Histopathology of the Lutjanus johni (Bloch, 1792) and Lutjanus russelli (Bleeker, 1849) from Visakhapatnam Coast, India

Histopathologic changes caused by digeneans and nematodes in the liver of Lutjanus johni (Bloch, 1792) and Lutjanus russelli (Bleeker, 1849) were studied.For this purpose histological sections were prepared and stained by routine procedures with haematoxylin and eosin and mounted permanently in Canada balsam.Photographs of selected portions were prepared in support of the damage caused by the parasites.The histopathologic changes caused by the Paracryptogonimus hirastrictus Manter, 1963 (Digenea: Cryptogonimidae) and Raphidascaris lutiani Raillietet Henry, 1915 (Nematoda: Heterocheilidae) include severe destruction and necrosis liver tissue.Destruction of epithelial cells, inflammation and an increase in thickness of sub-mucosa, atrophy and aggregation of inflammatory cells between hepatocytes.