Immunoglobulins or antibodies, play an important role in the immune system and help fight against harmful bacteria and viruses in the body. There are five classes of antibodies and several subclasses. Around 70-80% of antibodies in the blood are Immunoglobulin G or IgG antibodies, capable entering the tissues and fighting infection. IgG provides the majority of antibody-based immunity. IgG antibodies form the basis of long-term protection against microorganisms and in those with a healthy immune system, sufficient IgG antibodies are produced to prevent re-infection.
What might a low result mean?
Low IgG levels may be seen in those who have kidney damage.
What might a high result mean?
High levels of IgG antibodies may be because of a long-term infection in the body.