The liver tissue damage in the catfish was observed. Lobular arrangement and central veins were obscured. Atrophy of liver tissue with large spaces in between was obvious. Portal tract areas were congested, hepatocyte cord arrangement and shape was disturbed. Section of nematode larvae apparently viable was present in liver tissue. Proliferation of the bile duct in portal tract area was obvious resulting into bile duct hyperplasia. Liver tissue appeared congested, loosing the usual arrangement of hepatocyte cord. Central veins were obliterated. Sinusoids were dilated due to atrophy of liver...

Tissue changes in stomach and intestine were observed associated with nematode larvae infection. This infection causes disintegration of cellular organization of these organs. The changes like, fusion, atrophy of villi, epithelial cells and villous epithelium, sloughing of villi, lengthening of crypt gland and erosion and dislocation of gastric mucosa and shrinkage of tissue has also observed with the infection of acanthocephala, trematode, protozoan and nematode larvae. Lesion and inflammation in stomach and intestine also produced. Severe host tissue reactions resulting into degeneration of...