Immunoglobulin G (IgG) in canine serum (canine anti-dog serum IgG concentration)

Why Is This Test Done?

Your veterinarian may recommend this test to assess your dog’s immune response, especially after vaccination, to monitor immune function, or to diagnose conditions like immunodeficiency. It can also help evaluate how well a dog’s body is producing antibodies in response to specific antigens (substances like bacteria or viruses).

What to Expect Before the Test

No special preparation is needed for this blood test. Your dog may have a small needle inserted into a vein (usually in the paw or ear) to collect a blood sample. The process is quick and usually painless. If your dog is anxious, your vet may suggest calming aids or a sedative beforehand.

What Happens During the Test?

The collected blood sample is sent to a lab where it is analyzed to measure the IgG concentration. The test uses an immunoassay method to detect and quantify the antibodies present in the serum.

What Are the Possible Results?

Results are reported as a mass concentration (e.g., grams per liter). While reference ranges can vary by lab, lower than expected IgG levels may indicate weakened immunity, while higher levels might suggest an overactive immune response or chronic infection.