Why Is My Dog's C-Reactive Protein Level High ?
Why Is My Cat's C-Reactive Protein Level High ?
To see what normal blood and urine values are for your pet, go here
For an explanation of causes of most abnormal blood and urine tests go here
To see how tests are often grouped, go here
Ron Hines DVM PhD
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Your Pet's C-Reactive Protein Level
C-reactive protein is mainly produced in your dog or cat 's liver in response to inflammation or tissue damage anywhere in its body. It is one of the positive acute-phase proteins that all respond in this general way when your pet's macrophages and T-cells release pro-inflammatory cytokines. C-reactive protein blood levels go up within a matter of hours after inflammation begins and return to normal 1-2 weeks after the problem subsides.
C-reactive protein values have been used to monitor many causes of infection and inflammation in people and pets. You can read an e-brochure on its use in people here. The test can not tell you what the source of inflammation is or where it is located. But it does confirm its presence and that your pet is truly ill.
The test is currently offered to veterinarians as a way to confirm and monitor the treatment of inflammatory bowel disease (IBD) in dogs. C-reactive protein also increases in dogs with cancer and autoimmune disease as well as in cases of bacterial infection, gum (periodontal) disease, pancreatitis, arthritis and fat inflammation (panniculitis) and heartworm infection (ref). Levels also increase in dogs in early pregnancy. Endocrine gland diseases or neurological diseases rarely cause an elevation. (ref1, ref2) Texas A&M University offers the test as a way of measuring the severity of canine small intestinal disease and Idexx Laboratories announced in 2012 that they plan to as well.
Much less is currently known about the usefulness of this test in cats.
Running the c-reactive protein test periodically can give your veterinarian an indication if the medications and treatment being provided to your pet are improving its condition.