Specific
(Acquired) Immunity - 6
1.Mechanism:
Cell-Mediated Immune Response
TCytotoxic lymphocytes recognize infected cells by:
Linfected cell
expresses antigen on surface
Lantigen is
associated with MHC I type molecule
LTCytotoxic lymphocytes use TCR=s + CD3 to recognize surface antigen
Activated TCytotoxic lymphocytes destroy infected cells
2.Types of
responses: see figure 1-14 on page 21
Primary
specific immune response
Secondary
specific immune response
= the 1st
exposure to antigen
= subsequent
exposure to antigen
