Antigen
Classification - 1
Definition:
antigens can be
classified according to site of infectivity as:
˜Extracellular
(Exogenous) antigen
ˆoutside the
cell
ˆdirectly
accessible to immune system
ˆactivates
humoral immune system
ˆeffector
molecules (antibodies) bind to and destroy the antigen
ˆexamples of
organisms are:
Nbacteria
Nintracellular
organisms that exit cells during part of life cycle
%malaria
%Babesia
