Answer : The reason you are not getting any better is because the food reaction causing your symptom was not just an IgG or Ig4 but an immune complex reaction. If you had an immune complex reaction the other test would not have uncovered the food causing your symptom.

A.    IgG forms the main antibody component (80%) of blood. It also can cross the placenta. IgA is the main secreted antibody. It can be found in breast milk, saliva, tears, and secretions into the repiratory, intestinal and urogenital tract.

IgG stands for immune globulin G and IgM stands for immune globulin M. Both are types of antibodies. IgM is generally produced the first time a host is exposed to an antigen. IgM will eventually decline, and then the host produces IgG, which lasts much longer. Detection of IgM indicates acute or primary infection, IgG indicates past infection or immunity.

Gammaglobulin is an immunoglobulin (a.k.a. antibody), that is produced by B-Cells which are a type of white blood cell. B-cells produce immunoglobulins (antibodies) that kill virus, bacteria, fungus, and parasite antigens. Although the mechanisms of IVIG benefit are not fully understood, it is thought to inhibit damage to the myelin, thereby decreasing disease activity.

The low molecular weight serum antibody found in birds is IgY whereas mammals have IgG. IgY is the main serum immunoglobulin in chicken. Chicken IgY is the functional equivalent of mammalian IgG in birds but it differs in many functional aspects to mammalian IgG, read more >> . Like IgG, Chicken IgY consists of two light chains and two heavy chains. The molecular weight of IgY is approximately 180,000 Da and for IgG 160,000Da.

Ig is an abbreviation for immunoglobulin (antibody). Five types of immunoglobulins are present in colostrum, specifically IgA, IgD, IgE, IgG, & IgM. A quick harvest ensures the highest levels of immunoglobulins and other immune factors. These energizing elements in colostrum have been scientifically proven to be anti-bacterial, anti-viral, and anti-inflammatory in nature, thereby giving a healthy boost to the immune system when consumed.

The kit has been developed to work accurately with human IgG concentration up to 5 mg/ml. We have not tested samples with higher concentration, therefore we can not guarantee the accuracy of the assay at those levels.

Ask another parent for the name of the test they recommend (reputable companies are listed in Autism: Effective Biomedical Treatments… by Pangborn & Baker - pages 189-209). Order the test kit and take it to your physician.

IgG purification isolates all IgG in the serum, regardless of the specificity. This is advantageous for applications where removing serum proteins will help reduce background noise, but affinity purification against the immunizing protein isn’t possible. The affinity purification, by contrast, is advantageous for isolating only those antibodies that recognize a specific epitope. With a peptide, this can yield antibodies that have the same specificity as monoclonal antibodies.

Chicken IgG and chicken IgY are two different names for the same antibody. IgY is called so as it is the main antibody in egg yolk (y is from yolk). Human IgG got its name in the 1950's when it was possible to divide human plasma in three fractions: alpha, beta and gamma. Later it was discovered that there were also IgA, IgM, IgD and IgA in mammals. Chicken IgY has a different isoelectric point than human IgG and will not migrate in exactly the same fraction as human IgG.

Under the Criteria, patients previously receiving IVIg therapy for IgG subclass deficiency should be reviewed under the condition ‘Specific antibody deficiency’ if they are no longer experiencing serious infections. It is now generally agreed that IgG subclass level estimation in serum is relatively poorly predictive of infectious risk and is of limited value in the definition of those patients most likely to benefit from IVIg therapy.

In an outbreak setting, no. Previously vaccinated persons who are exposed to mumps will generally have existing, detectable serum IgG.