1 White blood cell count (WBC)
High values may indicate inflammation of body parts, leukemia, tissue necrosis, etc; But it can also be elevated during pregnancy and after intense exercise. Low values may indicate viral infections, aplastic anemia, and autoimmune diseases.

2 Red blood cell count (RBC)
Anemia or blood loss can affect the number of red blood cells. High values may lead to polycythemia; Low values may indicate anemia.

3 Hemoglobin measurement (Hb)
Hemoglobin exists in red blood cells and is a substance that transports oxygen to provide the necessary oxygen for the body. Females are generally lower in hemoglobin than males due to pregnancy. High values may indicate polycythemia and reduced cardiac output; When the value is low, it may indicate hypohemoglobin anemia or iron deficiency anemia. When animals suffer from anemia, the degree of reduction in hemoglobin and red blood cells varies. When severe hypochromic anemia occurs, the decrease in hemoglobin is more pronounced than in red blood cells. In red blood cell anemia, the reduction of red blood cells is more significant than that of hemoglobin.

4 Hematocrit (HCT)
It refers to the percentage of red blood cells in the blood volume, which can better understand the degree of anemia. High values may indicate dehydration or polycythemia; When the value is low, there may be anemia.

5 Mean corpuscular volume (MCV)
Represents the average volume of red blood cells. When the value is high, it indicates that the red blood cells are too large, which is seen in anemia and megaloblastic anemia that lack vitamin B12 and folate; When the value is low, it indicates small red blood cells, which is common in iron deficiency anemia, thalassemia, and anemia caused by chronic diseases.

6 Mean corpuscular hemoglobin (MCH)
Representing the average hemoglobin content in red blood cells, its clinical significance can be referred to in MCHC.

7 Mean corpuscular hemoglobin concentration (MCHC)
Representing the average concentration of hemoglobin in red blood cells as evidence for hemoglobin test values. Except for hereditary spherocytosis, the MCHC is not greater than 36; MCHC reduction is seen in iron deficiency anemia and thalassemia.

8 Red blood cell volume distribution width (RDW)
When there is a significant difference in the size of red blood cells, RDW will increase and can be used as a reference for diagnosing anemia. d

9 Platelet count (PLT)
High values may be associated with polycythemia, chronic myeloid leukemia, myelofibrosis, splenectomy, chronic infection, or acute infection recovery period. When the platelet count is too low, there may be a tendency for bleeding and poor coagulation in aplastic anemia.

10 Five categories of white blood cells (WBC differential count)
White blood cells are divided into neutrophils, eosinophils, basophils, lymphocytes, and monocytes. The value of white blood cell classification should be coordinated with the white blood cell examination value in order to make a correct diagnosis.
Elevated neutrophils: may be caused by bacterial infection, inflammation, or myeloproliferative disorders.
Low neutrophil count: There may be aplastic anemia or side effects of certain medications.
Excessive eosinophils: may cause allergies, parasitic infections, various skin diseases, malignant tumors, or leukemia.
Excessive basophilic granulocytes: may lead to chronic myeloid leukemia and myeloproliferative disorders.
Mononucleosis: may occur during the recovery period of acute bacterial infections or in monocytic leukemia.
Increased lymphocytes: may be infected with viral infections or tuberculosis.
Decreased lymphocytes: There may be immune deficiency diseases and aplastic anemia.
Reduced red blood cells, decreased white blood cells, decreased lymphocytes, and increased eosinophils are blood routine index features of feline transmission.

PS: All seven of these are possible. It’s not just that one item is high or low that there’s a problem. Often, it’s only when several items are high or low at the same time that there’s a problem.