Which class of antibodies is produced first during an infection?
A)IgA
B)IgG
C)IgE
D)IgM

Question

Quizplus · Accepted Answer

IgM is the first class of antibodies produced during an infection. It is produced by B cells and its production is stimulated by the surface antigens of pathogens. IgM appears in the bloodstream before any other class of antibody and is responsible for the initial defense against a pathogen. Its levels decrease as the production of IgG increases, which takes over as the primary class of antibody during later stages of infection.

Which Class of Antibodies Is Produced First During an Infection