Immunity To Parasite

Immunity to Parasite Dr. Mejbah Uddin Ahmed

Immunity to Parasite Immunity against parasitic infection may be: innate or acquired type. There is another immune response against parasite is known as premunition.

Innate immunity: Does not depend upon previous exposure. It is probably related genetic constitution of the host. For example: African children carrying the sickle-cell trait (HbS heterozygotes) are relatively resistant to P. falciparum infection.

Acquired immunity: It may be antibody mediated or cell mediated. This type of immunity can be achieved either actively or passively.

Acquired active immunity: Acquired active immunity may be antibody or cell mediated by. It developed after a natural infection or may be induced artificially. Infection with L. tropica provides life long immunity.

Acquired passive immunity: Antibodies against parasite may pass from mother to fetus through placenta and breast milk from an immune mother.

Premunition:

Concomitant

immunity

or

infection immunity in which there is a relative resistance to infection of host still carrying the infecting organism. It disappears with the cure of the infection. ***Vaccination is not very much successful against parasitic infection.