IgG | Immunoglobulin G

Immunoglobulin G (IgG) - these are antibodies that are crucial for the body's long-term protection against infections, as they react more slowly but last longer than IgM in response to the initial antigenic stimulus. However, when the same antigenic stimulus is repeated, IgG levels rise quickly and early. IgG is the only immunoglobulin that crosses the placenta, making it extremely important for the protection of infants against infections. IgG concentration decreases: in the presence of lymphatic system tumors, and in nephrotic syndrome. IgG concentration increases: in autoimmune diseases (systemic lupus erythematosus, rheumatoid arthritis, Sjögren's syndrome), sarcoidosis, chronic liver disease, certain parasitic diseases, and chronic or recurrent infections.