Complete Blood Count with Differential (CBC with Differential)

What Does the CBC Measure?

Your blood is analyzed for several key components: **Red Blood Cells (RBCs)** – carry oxygen to your body’s tissues; **White Blood Cells (WBCs)** – fight infections and inflammation; and **Platelets** – help your blood clot. The differential count breaks down the types of white blood cells (neutrophils, lymphocytes, monocytes, eosinophils, basophils) to identify specific health concerns.

Why Might You Need This Test?

A CBC is often the first test doctors use to check for signs of anemia, infections, bleeding disorders, or other blood-related issues. It can also help monitor chronic conditions like diabetes, kidney disease, or cancer.

How Is the Test Performed?

A small blood sample is taken from your arm or finger. The blood is then examined under a microscope to count and identify the different cell types. Some labs may use automated machines to analyze the sample quickly and accurately.

What Are Common Results and Their Meanings?

Low RBCs or hemoglobin may indicate anemia, while high RBCs could suggest dehydration or other conditions. Low platelets may signal bleeding disorders, and high platelet counts might point to conditions like cancer or infection. The differential helps pinpoint whether an infection is viral, bacterial, or another type.