Following is true about C reactive protein -
S. pneumoniae contain a nucleoprotein deep inside the cell and a somatic C antigen. An abnormal beta globulin that precipitates with the somatic C antigen of S. pneumoniae is called CRP. It appears in acute-phase of pneumonia but disappears during convalescence. ref:Textbook of microbiology, Ananthanarayan an, Paniker. Page no.: 222
Detected by precipitation with cabohydrate
Raised in acute pneumococcal infection
It is antibody
Detected by agglutination test
Immunology