Horse IgG is a plasma B cell derived antibody isotype defined by its heavy chain. IgG is the most abundant antibody isotype found in horse serum. IgG crosses the placental barrier, is a complement activator and binds to the Fc-receptors on phagocytic cells. The level of IgG may vary with the status of disease or infection.
Equine IgG antibodies mainly regulate mucosal and systemic immunological responses and thereby, provide protection against disease-causing pathogens such as Streptococcus equi, and the horse flu virus. Horse IgG may also function to control the advancement of EHV-1 infection .
