Page 105 - MNU microbiology theoritical 2025

General Microbiology & Immunology (PM 401) Second level Semester 4 2024/2025

Terms in immunology

Immunology: is the study of our protection from foreign molecules or invading

organisms and our responses to them. These invaders include viruses, bacteria, protozoa

or even larger parasites.

Immunization: means how to provide body with immunity against diseases to prevent

or limit infection by microorganisms

Antigen: is foreign material causing an immune response e.g. Pollen grain, bacteria,

fungi, virus and organic pollutants

Antibodies: are specific substances formed in the body in response to antigenic

stimulation and react specifically with antigen that stimulate their production. They are

called immunoglobulin (Ig)

Immune System: It is our immune system that enables us to resist infections. The

immune system is composed of two major subdivisions:
I- The innate or nonspecific immune system.

II- The adaptive or specific immune system.

General Microbiology & Immunology (PM 401) theoretical handbook Page 94