Human body treated all of the food that we ate, either plants or animals, as foreign substances. It is body immune system’s function to protect us from foreign material’s intrusion which may causes harmful to us. Then why does our immune system not oppose and refuse foreign materials that we consume as food?”

Naturally, if our body totally reject those foods which get into our body, we could not survive! Then, what is it that allows for food to plainly evade the roadblock of immune cells and be taken up into our bodies? In the final process, food become an integral part of our tissues and organs, and then be used as fuel for essential body processes. Research has begun to reveal part of the answer to this important issue in our body complex immune system question: the complex series of events known as oral tolerance. (more…)

Bacteria cause disease because of toxicity, invasiveness, immunopathology, or lends of these three mechanisms. Thus much of the interaction between a given bacterial species and the cellular immune response can be predicted by considering the immunological mechanisms available in relation to the mechanism of pathogenicity, and the structure of the bacterium. For a toxigenic bacterium, neutralizing antibody may be all that is needed. Otherwise destruction of the organism itself may be required. (more…)