Histological and histochemical study of the intestine in invasive species Acridotheres tristis in Iraq

The current study was conducted to find out the most important histological and histochemistry differences in bird A. trisris intestine. samples were dissected; remove fixed 10% formalin, preparing them for histochemical study. results showed there a Histological sections that mucosa of tristis small intestine presented numerous long villi which lined by simple columnar epithelium. In large with Alcian blue (pH2.5) stain epithelium intestinal crypts goblet cells contained acidic mucopolysaccharide. While enterocytes negative reaction. With PAS stain, strong neutral mucopolysaccharid within cells.