what is an igg blood test
The IgG blood test is ordered to determine the amount of immunoglobulin G in the blood stream. Although IgG is the most occurring immunoglobulin in the blood, the results can reveal the presence of infection and your level of immunity.slide 1 of 5. This is a simple blood test used to determine the amount of immunoglobulin G, an important part of the bodyâs immune system.This particular immunoglobulin is the most prevalent in the body and helps protect from bacteria and other pathogens that may cause illness by creating an antigen to fight off such pathogens.owever, there are limitations to the IgG blood results. This test alone can not be utilized to diagnose a specific disease. In most cases, the IgG is ordered in combination with the IgA and IgM, along with other tests when the physician suspects a certain illness or condition.