Primary antibody response

Definition

The primary antibody response is the initial immune response to an antigen, characterized by the production of IgM antibodies followed by IgG antibodies. It typically takes 7-14 days to reach its peak after the first exposure to an antigen.

5 Must Know Facts For Your Next Test

1. The primary antibody response involves naïve B cells recognizing and responding to an antigen for the first time.
2. IgM is the first type of antibody produced during this response, followed later by IgG.
3. The lag phase, or latent period, before detectable antibodies are produced can last from several days up to two weeks.
4. Memory B cells are created during this response, which will allow for a faster and stronger secondary response upon re-exposure to the same antigen.
5. The affinity of antibodies produced in the primary response is generally lower compared to those produced in subsequent responses.

Related terms

Secondary Antibody Response:

A more rapid and robust immune response upon a second exposure to an antigen.

Naïve B Cells: B lymphocytes that have not yet encountered their specific antigen.

Immunoglobulin M (IgM): The first type of antibody produced in a primary immune response.