Assay Details

The hemagglutination-inhibition (HAI) test is a common test for the serological diagnosis of virus infections.  Viruses have surface proteins that attach to red blood cells and cause them to agglutinate (hemagglutination). The basis for the hemagglutination-inhibition test (HAI) is antibodies against the viral protein will prevent the virus induced hemagglutination. Serum from the animal is tested to determine the minimum dilution that inhibits the hemagglutination. This is reported as the HAI titer of the serum.

A number of HAIs are offered targeting influenza strains H1N1, H3N2, H5N1, H7N9 and H10N8.

IBT Bioservices continues to conduct critical work as an essential business under the State of Maryland’s COVID-19 response directive. We have implemented a risk management plan and are continually monitoring the situation to ensure continuation of research according to public health services recommended best-practices for keeping our employees and the community safe. 

The IBT Bioservices team will continue to deliver high quality products and services for every project. If you have any questions contact us at