Major categories of Specific adaptive immune responses
Specific adaptive immune responses can be differentiated into two major categories based on whether B or T cells are primarily involved. What are these two categories?
1. Humoral immunity refers to immune responses involving antibody that is produced by mature B cells and plasma cells. Important for defense against bacteria, especially those with a polysaccharide capsule (e.g., Pneumococcus , Haemophilus influenzae ).
2. Cellular immunity is mediated by T cells that secrete cytokines and signal effector cells to direct an overall cell-mediated immune response. Important for defense against virus, parasites, fungi, and mycobacteria.