IgG | Immunoglobulin G

Immunoglobulin G (IgG) is an antibody that is extremely important for the body's long-term protection against infection, as it reacts to the primary antigenic stimulus more slowly but longer than IgM. However, when the same antigenic stimulus is repeatedly exposed, IgG levels rise rapidly and early. IgG is the only immunoglobulin that crosses the placenta, so it is extremely important for the processes of protecting babies against infection. IgG concentration decreases: in case of tumors of the lymphatic system, in case of nephrotic syndrome. IgG levels are increased in: autoimmune diseases (systemic lupus erythematosus, rheumatoid arthritis, Sjögren's syndrome), sarcoidosis, chronic liver disease, some parasitic diseases and chronic or recurrent infections.