Which test helps quantify proteinuria and evaluate kidney disease severity in a diabetic dog with proteinuria?

• A. Urine culture only
• B. Blood urea nitrogen
• C. Urine protein:creatinine ratio
• D. Serum ketone level

Answer: (C)

Quantifying protein loss in urine and using that to gauge kidney disease severity is what this test does. The urine protein:creatinine ratio provides a normalized, quantitative measure of how much protein is being lost in the urine, using creatinine to account for how concentrated or dilute the urine is. This makes it the most informative test for assessing the degree of proteinuria and tracking progression or response to therapy in a diabetic dog with proteinuria.

Urine culture would only reveal infection, not the amount of protein lost. Blood urea nitrogen reflects overall kidney function and hydration status but doesn’t quantify proteinuria or its severity. Serum ketone level relates to diabetic ketoacidosis, not renal protein loss.