Neutrophils can kill microbes through generation of oxidatitive killing products.
Neutrophils can kill microbes through non-oxidative substances found in their granules.
Septic shock or septicemia is caused by this bacterial product. When an infectious agent enter a host, a disease always occurs. Receptors are present on the cells in the human body just for the attachment of infectious agents. An organism such as Clostridium tetani can cause disease by producing an exotoxin. Parasites which persist in the host for longer than 1 week must develop mechanisms for evading the adaptive immune response.