Activation of B cells requires two signals. Depending on the nature of the antigen, B-cell activation proceeds by two different routes, one dependent on helper T cells (TH cells), the other...
Category: Difference Between
Immunity is defined as the resistance offered by the host against microorganisms or any other foreign substance(s). Immunity can be broadly classified into two types based on its specificity; less...
The initial encounter of a naïve immune-competent lymphocyte with an antigen induces a primary immune response; a later contact of the host with the same antigen will induce a more rapid and...
The advent of Electron Microscopy in 1932 opens the door to visualizing small subcellular structure and viruses which were beyond the scope of light microscopy which can’t resolve objects separated...
Major histocompatibility complex (MHC) molecules are tightly linked cluster of genes whose products are associated with intercellular recognition and self-non-self-discrimination. MHCs are present in...
Acute diarrhea is categorized as noninflammatory (watery, nonbloody) or inflammatory (bloody). The term dysentery refers to bloody diarrhea. Bloody diarrhea caused by Shigella is often called...