Immunoglobulin G(IgG) Determination Reagent(Immunoturbidimetry) is an in vitro diagnostic quantitative test kit. This test is used to monitor therapy in lgG myeloma or evaluate patients especially children and those with lymphoma, with propensity to infections. Immunoglobulin G is the major antibody containing protein fraction of blood. With significant decreases in IgG level, on either a congenital or acquired basis, there is an increased susceptibility to infectious processes ordinarily dealt with by humoral antibody (ie, bacterial infection). Thus, patients with repeated infection should have their immunoglobulins, and specifically IgG, measured.