Lymphoid tissue in the tracheal wall of stress-sensitive Wistar rats after exposure to stress
Using the histological and histochemical methods, the changes of cell composition in mucosal lamina propria and submucosa of the tracheal wall were studied in 20 Wistar male rats, predisposed to stress. 10 rats formed the control group, while other 10 (experimental group) were subjected to immobilization with electrocutaneous irritation (emotional stress). It was demonstrated that after exposure of animals to emotional stress, the number of large lymphocytes per unit area of the section was increased in the basis and the cupola of lymphoid nodules, while the number of small lymphocytes in the basis of lymphoid nodules was decreased. The number of cells with the signs of destruction per unit area of the section was increased as compared to that in control group. The number of small lymphocytes around the excretory ducts of the glands was increased almost 1.5 times after the exposure to stress.