Pulmonary surfactant is a surface-active lipoprotein complex (phospholipoprotein) formed by type II alveolar cells. The proteins and lipids that make up the surfactant have both hydrophilic and hydrophobic regions.
Antibody deficiencies, also called immunoglobulin deficiency syndromes, are immune system disorders that are characterized by low or absent levels of immunoglobulin in the blood.Immunoglobulins (Ig) are antibodies that play an essential role in the body's immune system.he antibodies are present in the bloodstream or bound to the outer surfaces of B-cells or plasma cells. There are five classes of immunoglobulins: IgA, IgD, IgE, IgG, and IgM. Patients who have antibody deficiencies may have reduced or absent levels of one or more types of immunoglobulin.
1 Specific IgG antibody deficiency can also be seen in the presence of monoclonal gammopathy, which may also give a normal total IgG level. 2  IgG1 subclass deficiency is usually associated with decreased total IgG levels, and is more commonly found in adults.ee the list below: IgG deficiency. 1  One should look for a pattern of organ-specific infection (ie, otitis media, sinopulmonary infection), recurrent infections with same organism, systemic infections, dental and oral disease, autoimmune disease, and a family history of such conditions.