Skip directly to site content
Centers for Disease Control and Prevention. CDC twenty four seven. Saving Lives, Protecting People
For a full list of topics:
Public Health Image Library (PHIL)
At the component level, this diagram illustrates what takes place microbiologically, during an indirect hemagglutination (IHA) inhibition test, which implements the herpes simplex virus (HSV) antigen in order to detect the presence of the HSV-specific antibody. Note that the upper portion of the diagram illustrates in a simplistic manner, the reactive interaction between the HSV-specific antibody, and the HSV antigen that induced the formation of an HSV antigen-antibody complex. The lower half of the diagram then shows how sheep red blood cells (RBCs) when sensitized, or bound, to the HSV antigen, cannot bind to the HSV antigen-antibody complex, and subsequently, there is no hemagglutination of the sheep RBCs, thereby, producing a positive test result.
Click here for hi-resolution image (18.48 MB)
CDC/ Dr. F.T. Forrester
Skip Navigation Links.
Skip Navigation Links.
Analytical, Diagnostic and Therapeutic Techniques and Equipment
Laboratory Techniques and Procedures
Hemagglutination Inhibition Tests
Hemic and Immune Systems
Biological Phenomena, Cell Phenomena, and Immunity
Chemicals and Drugs
Immunologic and Biological Factors
- This image is in the public domain and thus free of any copyright restrictions.
Add to My Pictures
What's New in PHIL
Health Care Providers
Public Relations / Communications
Teachers & Trainers
Photo Librarians & Researchers
Public Health Practitioners
Image ID Search
Get Email Updates
To receive email updates about this page, enter your email address:
Exit Notification / Disclaimer Policy
Links with this icon
indicate that you are leaving the CDC website.
The Centers for Disease Control and Prevention (CDC) cannot attest to the accuracy of a non-federal website.
Linking to a non-federal website does not constitute an endorsement by CDC or any of its employees of the sponsors or the information and products presented on the website.
CDC is not responsible for Section 508 compliance (accessibility) on other federal or private website.
For more information on CDC's web notification policies, see