Author name:
زينة حمزة جعفر
Supervisor name:
جبار عباس احمد الساعدي | محسن عبد نعمة الروضان
Abstract:
صممت الدراسة الحالية بهدف تحديد التاثيرات الفسلجية والمناعية والنسجية المرضية التي تسببها الذيفان الداخلي لجرثومة Salmonella typhimurium وتداخل فيتامين E والسلنيوم في تقليل تاثيراتها السمية في اعضاء الجسم وتعزيز فعالية الجهاز المناعي لذكور الجرذان البيض. | The present study has been designed to determine the physiological, biochemical, immunological and histopathological effects of endotoxin of Salmonella typhimurium and the interaction of vitamin E and selenium in releifing its toxic effects on body organs, as well as its immuno - modulatory effect in mature male ratsForty mature male rats, nearly similar in their weight and age, were randomly divided into four equal groups : First group (control) rats were injected with normal physiological saline (0.5 cc ip) and 2nd group (T1) have been given the ration drinking water and injected with endotoxin intrapretonealy with dose 0.5 mg/kg bw for 18 days while (T2) and (T3) groups were treated by vitamin E with a dose of 30 mg/kg bw and selenium with a dose of 2.8 ppm/kg bw) for 30 days. (T2) was injected at thirty one day by endotoxin at a dose 0.5 mg/kg bw intrapretonealy for 8 days. Public health parameters like body weight, blood parameters (RBC count, PCV, total WBC count and differential leucocytes count, AST and ALT concentration) Phagocytosis activity for neutrophil and monocytes. Immunoglobulins (IgA, IgM and IgG) estimation, gross and histopath - ological changes and clinical sings were included in the present study.The results revealed that endotoxin injection led to different changes, its significancy flactuated according to the type of studied parameter, as follow : The results of clinical sings of experimental animals revealed occurrence of excitation after 10 minutes of injection, sever dullness, loss of appetite, muscular weakness, lateral recumbency in addition of loss of weight and easily handle. Significant decrease (P<0.05) of body weight, RBC count, ,PCV and monocytes percentage. Significant increase (P<0.05) of total WBC count and percentage of neutrophil, lymphocytes, eosinophil, and AST, ALT, IgM and IgA concentrations and no significant difference of IgG concentration. Significant decrease (P<0.05) of phagocytic activity.Gross pathological changes represented by the presence of necrotic and hemorrhagic foci, clotting as well as congestion and enlargement of liver, kidneys, lungs, spleen and heart. The histopathological appearance revealed by vaculation, necrotic and degenerative changes of hepatocytes in live, the spleen showed many changes led to imbalance between white and red bulb spaces, the heart showed lack of cross striation, edema between cardiac muscle fibers, while lungs showed an emphysema and sever hyperplasia in the bronchial epithelium. From other hand, the results showed that receiving vitamin E and selenium had an efficient effect for the improving the toxic effects of endotoxin and relieving its toxicological changes in the animal organs as compare with group that injected with endotoxin only, this group shows slight clinical signs and increase of appetite and drinking of water, improvement of blood parameters and reduce in the concentration of ALT and AST in blood serum, also there was increase in the phagocytic activity and increase in the levels of IgM, IgA and IgG. The gross pathological cganges less sever as compare with T1. It can be concluded that exposure to Salmonella typhimurium endotoxin leads to many distinct toxic effects on different organs and systems of the body which may results in many physiological disturbances. This study, also, proved that vitamin E and selenium have an important efficient role in improving the toxicological changes resulted from endotoxin poisoning.
