Lab Section: Virology
Description: Hemagglutination Inhibition Test (antibody detection) specific for H3N8 virus. Automatically paired with HI test for H3N2 at no additional charge.
Min Sample Volume:
Collection Container: red top blood collection tube
Coolant: It is recommended to ship samples with an ice pack.
Test Target: Antibody
Test Days: Thursday
Test Turnaround (business days): 3-7 days
The below interpretation applies to both H3N8 and H3N2 testing:
The hemagglutination inhibition antibody titer is the reciprocal of the highest dilution of serum that prevents the agglutination of red blood cells by influenza virus. (endpoint dilution of 1:128 = antibody titer of 128). Titers are in units of antibody and as such all values reported without modifiers contain that specified amount of antibody in the sample. Values with a < (less than symbol) indicate no detectable antibody at the minimum readable dilution (<8 = no detectable antibody at a 1:8 dilution). An antibody titer can result from vaccination, infection, or passive maternal transfer.
For Canine Influenza Virus the following guidelines are offered:
HI titer <8 - no exposure to canine influenza virus or sample collected in very acute phase of the infection. Second serum needed to define status.
HI titers 8-16 - serum collected in acute phase of infection or a non-specific reaction. Second serum needed to define status.
HI titers >16 - evidence of exposure to canine influenza virus
