antilichaamvasteerde
An **antilichaamvasteerde** (also known as an *immunoglobulin G (IgG) subclass deficiency* or *IgG subclass deficiency*) refers to a condition characterized by abnormally low levels of one or more subclasses of immunoglobulin G (IgG) antibodies. IgG antibodies are a critical component of the immune system, playing a key role in fighting bacterial and viral infections. The four subclasses of IgG—IgG1, IgG2, IgG3, and IgG4—each have distinct functions, and deficiencies in one or more of these subclasses can impair immune responses.
This condition is often identified through blood tests that measure the levels of each IgG subclass. While
Antilichaamvasteerde is typically diagnosed after other causes of recurrent infections, such as common variable immunodeficiency (CVID)
The condition is generally not inherited but can sometimes occur spontaneously or be associated with other