cell mediated response

• role of killer T cells

  1. host cell, infected by bacteria, displays antigens on its MHC and becomes an APC
  2. T-killer cells with complementary receptors bind to the APC
  3. cytokines, previously secreted by T-helper cells, stimulate T-killer cells to divide by mitsosis forming active T killer cells and T memory cells
  4. active T-killers biding to infected cells becoming APC
  5. T-killers release chemicals, which form in infected cells causing lysis- T memory remain to allow immediate SIR to occur if reinfected