What is a normal range of white blood cells for cats?

• A. 1.0 - 5.0 x10^9/L
• B. 2.0 - 8.0 x10^9/L
• C. 3.0 - 12.0 x10^9/L
• D. 5.5 - 19.5 x10^9/L

Answer: (D)

In cats, the total white blood cell count typically sits in the range of about 5.5 to 19.5 x10^9/L. This reflects normal variability between individual cats and laboratory methods. White blood cells include neutrophils, lymphocytes, monocytes, eosinophils, and basophils, and the total count serves as a general screen of immune status. A count within this range suggests there isn’t an obvious systemic infection or inflammation at the moment, though the specific makeup of the white cells (the differential) still matters. Counts below this range (leukopenia) can indicate bone marrow or immune issues, while counts above it (leukocytosis) can point to infection, inflammation, stress, or steroid effects. Use the total count together with the differential and clinical signs to interpret a cat’s immune status.