Antigen
Classification - 2
Definition:
antigens can be
classified according to site of infectivity as:
˜Intracellular
(Endogenous) antigen
ˆinside the
cell
ˆnot directly
accessible to immune system
ˆactivates
cell-mediated immune system
ˆeffector
cells are Tcytotoxic and destroy both the infected cell and the antigen
ˆexamples of
organisms are:
Nviruses
HIV, Hepatitis
Nintracellular
organisms like:
%bacteria
M. tuberculosis
%rickettsia
R. rickettsii
