1 / 13

Antigen antibody reaction

Antigen antibody reaction. Virus neutralization. Virus Neutralization Tests Hemagglutination inhibition test Hemagglutination inhibition test is widely used to diagnose influenza, measles, mumps and other viral infections.

hogan
Télécharger la présentation

Antigen antibody reaction

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Antigen antibody reaction

  2. Virus neutralization

  3. Virus Neutralization Tests • Hemagglutination inhibition test • Hemagglutination inhibition test is widely used to diagnose influenza, measles, mumps and other viral infections. e.g. If a person has measles, antibodies will be present in the serum to react with the measles viruses and neutralize them and there will be no agglutination of RBC’si.e.Hemagglutination inhibition. • It will be a positive test for the viral infection being studied.

  4. 2. Inhibition of Cytopathic Effects The presence of antibodies against a virus can be detected by the antibodies’ ability to prevent cytopathic effects of viruses in cell cultures.

  5. Virus + Serum Incubation add to tissue culture of the appropriate cells. Serum with the Specific AbNo specific antibody No CPE CPE

  6. Immunofluorescence

  7. Immunofluorescence (IF): is a microscopic technique that uses specific antibodies labeled with fluorochromes to detect, localize, or quantify microorganisms (or proteins expressed in virus-infected cells) in samples applied to slides. • A variety of fluorochromes are available, but the most commonly used are fluorescein and rhodamine. These can be covalently attached to antibody molecules and made visible by UV light in the fluorescence microscope.

  8. Two types • Direct fluorescent Ab test: used to detect Ag or microorganism • Indirect fluorescent Ab test: used to find a specific Ab in the serum A. Direct fluorescent-antibody test In the direct fluorescent-antibody test, the fluorescent dye is attached directly to the antibody that is interacting with the antigen (dark triangles) on the surface of the cell.

  9. B. Indirect fluorescent-antibody test • In the indirect fluorescent-antibody test, the fluorescent dye is attached to antibody made against human IgG.

More Related