Nowadays uncontrolled administration of the antibiotics causes to high resistance in most of the pathogenic bacteria and it is necessary to use alternative methods. Using herbal plants and essences as alternative can be considered that aids in treatment process in addition to antimicrobial effects with positive impact on the body immune system. In this research the effect of green tea on some immunologic factors such as number of white cells and also serum globulin level were investigated by experiment on the rats. Finally it was concluded that in the studied group the blood white cells number, serum total protein and globulin level increased relatively to control group and albumin level is significantly higher in the treatment group relative to control group that indicates the effect of green tea on relative increase of the body immunology.
