Studies on the thymus gland of mice with schistosoma mansoni, trichinella spiralis and mixed infections

The changes in the thymus gland after S. mansoni, T. spiralis and mixed infections were studied. Histopathologically an increase in the number of lymphocytes and lymphoblasts, reticular cells and histiocytes was observed. The DNA content of the nuclei and the number of mitotic figures was higher in the infected groups. The maximal changes were noted in T. spiralis group followed by the mixed then the S. mansoni groups as compared to control animals

Histological changes in the liver of merluccius by anisakis larvae

Larval nematodes belonging to the genus Anisakis is redescribed from Merluccius merluccius from Egypt. The larvae are characterized by the presence of a lip mass surrounding the mouth opening and a tail spine at its post. end. The alimentary canal is simple without oesophageal appendix or intestinal caecum. The average length of the larva and that of the oesophagus with its two portions are also included. This parasite is reported here on account to record its new locality. Histological examination of normal fish liver demonstrated a diffused pancreatic tissue composed of pancreatic acini and islets of Langerhans. The hepatic parenchymal cells are arranged in strands enclosing a network of sinusoids in between. Histopathologic studies of liver infected with Anisakis larvae revealed a hypertrophy in parenchymal cells and necrosis in the nuclei. Some capsules enclosing larvae were also observed. Histochemically, a significant decrease in lipids and acid mucopolysaccharides was noted in infected hepatic cells in comparison with normal liver tissue