Immunoglobulin G (IgG) LIS Code: IgG

Understanding Immunoglobulin G (IgG)
Immunoglobulin G (IgG) is the most prevalent type of antibody found in the bloodstream. Produced by plasma cells in response to infections or immunizations, IgG plays a vital role in protecting the body against harmful pathogens.

Key Role in Immune Defense
IgG antibodies are crucial in the immune system's defense by binding to and neutralizing bacteria, viruses, and other pathogens. They also activate the complement system—proteins that help destroy invading microorganisms—enhancing the body’s immune response.

Highly Specific and Protective
These antibodies are highly specific, meaning they can identify and bind to a wide array of pathogens with precision. Notably, IgG antibodies are the only type capable of crossing the placenta, offering passive immunity to newborns during pregnancy.

Clinical Use of IgG Testing
IgG testing can help determine past exposure to specific infections and assess whether immunity has developed. Such tests are commonly used in diagnostic evaluations and to monitor immune response after vaccination.

IgG Levels and Health Conditions
Abnormally low IgG levels can indicate immune system disorders such as primary immunodeficiencies—genetic conditions affecting the body's ability to produce antibodies. Conversely, elevated IgG levels may be associated with chronic infections and autoimmune diseases.

Private IgG Testing in Slough and Nearby Areas
For individuals in Slough, Windsor, Maidenhead, and surrounding Berkshire areas, private blood testing for IgG levels is available at local diagnostic clinics. This service is ideal for patients seeking clarity on immune status, recurrent infections, or concerns regarding vaccination response.