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Chapter: Microbiology and Immunology: Bacteriology: Bacillus

Cell Wall Components and Antigenic Properties - Bacillus anthracis

Three types of antigens are present in anthrax bacillus.

Cell Wall Components and Antigenic Properties

 Antigenic properties

Three types of antigens are present in anthrax bacillus. These are:

Capsular antigen: Capsular antigen is present in virulentcapsulated strains of B. anthracis. Antibodies against capsular antigen are not protective.

Cell wall antigen: Cell wall antigen is present in the cellwall and is made up of N-acetylglucosamine and D-galactose. It cross-reacts with blood group A antigen and with capsular polysaccharide of type 14 Pneumococcus. The antibody against the cell wall antigen is not protective.

Somatic  antigen:  Somatic  antigen  is  a  heat-labile  protein  present  in  bacterial  body.  It  stimulates  immune  system  to produce antibodies, which are protective in nature.




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Microbiology and Immunology: Bacteriology: Bacillus : Cell Wall Components and Antigenic Properties - Bacillus anthracis |


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