The DLC (Differential Leucocyte Count) Test is a blood test that measures the different types and proportions of white blood cells (WBCs) present in the blood. It helps evaluate the body's immune system function, infection response, inflammation, allergies, and certain blood disorders.
This test is commonly performed as part of a Complete Blood Count (CBC) to identify changes in different white blood cell types and help doctors diagnose infections, allergic conditions, immune disorders, and other health concerns.
1.Neutrophils
Most common white cells; first defence against bacterial infection (percentage).
2.Lymphocytes
Immune cells that fight viruses and abnormal cells (percentage).
3.Absolute Neutrophil Count (ANC)
Actual number of neutrophils; shows infection-fighting ability.
4.Basophils
Least common white cells; involved in inflammation and allergy (percentage).
5.Monocytes
White cells that clear damaged cells and fight infection (percentage).
6.Absolute Lymphocyte Count (ALC)
Actual number of lymphocytes in the blood.
7.Absolute Eosinophil Count (AEC)
Actual number of eosinophils; used to assess allergy and parasitic infection.
8.Absolute Basophil Count (ABC)
Actual number of basophils in the blood.
9.Eosinophils
White cells involved in allergic reactions and parasite defence (percentage).
10.Absolute Monocyte Count (AMC)
Actual number of monocytes; reflects immune activity and inflammation.
Also known as: Differential White Blood Cell Count, Differential Leukocyte Count, WBC Differential Count, White Blood Cell Differential Test, DLC Blood Test
The Differential Leucocyte Count Test evaluates the distribution of different types of leukocytes (white blood cells) in the bloodstream. White blood cells play an important role in protecting the body against bacteria, viruses, parasites, allergens, and other harmful substances.
Each type of white blood cell has a specific function:
Changes in these cell counts can provide important information about infections, inflammation, immune system activity, and blood-related conditions.
The DLC Blood Test measures five major types of white blood cells and their absolute counts.
Neutrophils:
Neutrophils are the most common type of white blood cells and provide the body's first defense against bacterial infections.
High neutrophil levels may be seen in:
A DLC Test may be recommended for:
The DLC Test requires a blood sample collected from a vein.
Before the test:
| Parameter | Normal range |
|---|---|
| Neutrophils | 40–70% |
| Lymphocytes | 20–40% |
| Monocytes | 2–8% |
| Eosinophils | 1–6% |
| Basophils | 0–1% |
| Absolute Neutrophil Count (ANC) | Approximately 1,500–8,000 cells/µL |
| Absolute Lymphocyte Count (ALC) | Approximately 1,000–4,000 cells/µL |
| Absolute Monocyte Count (AMC) | Approximately 200–800 cells/µL |
| Absolute Eosinophil Count (AEC) | Approximately 40–400 cells/µL |
| Absolute Basophil Count (ABC) | Approximately 0–100 cells/µL |
| Note | Reference ranges may vary depending on age, gender, laboratory methods, and individual health conditions. Test results should always be interpreted by a qualified healthcare professional. |
Reference ranges can differ between labs. Your report shows the range used by the lab.
A DLC (Differential Leucocyte Count) Test is a blood test that measures different types of white blood cells to evaluate immune function and detect infections, allergies, and inflammatory conditions.
No, fasting is generally not required for a DLC Test. However, follow your healthcare provider's instructions if it is performed along with other fasting tests.
A high neutrophil count may indicate bacterial infection, inflammation, physical stress, or certain medical conditions.
High lymphocyte levels are commonly associated with viral infections but may also occur in other immune-related conditions.
| Test name | DLC (Differential Leucocyte Count) Test |
|---|---|
| Location | Chennai |
| Sample type | Blood |
| Number of parameters | 10 |
| Home sample collection | Available |
| Fasting | Not required |
| Report time | As per laboratory processing time |
| Recommended age | 1–99 years |
| Suitable for | Male & Female |
Low neutrophil levels may increase the risk of infections.
Lymphocytes:
Lymphocytes are immune cells responsible for identifying and fighting viruses, bacteria, and abnormal cells.
High lymphocyte levels may occur due to:
Low lymphocyte levels may be associated with:
Absolute Neutrophil Count (ANC):
ANC measures the actual number of neutrophils present in the blood. It helps assess:
Monocytes:
Monocytes are white blood cells that help remove harmful microorganisms, dead cells, and damaged tissues.
High monocyte levels may occur in:
Absolute Monocyte Count (AMC):
AMC measures the total number of monocytes in blood and helps evaluate immune activity and inflammatory responses.
Eosinophils:
Eosinophils are involved in allergic reactions and protection against parasitic infections.
High eosinophil levels may be associated with:
Absolute Eosinophil Count (AEC):
AEC measures the actual number of eosinophils in the blood and is commonly used for evaluating allergic conditions and parasitic infections.
Basophils:
Basophils are the least common white blood cells and help regulate inflammation and allergic responses.
High basophil levels may be associated with:
Absolute Basophil Count (ABC):
ABC measures the actual number of basophils in the bloodstream.
Doctors may recommend a DLC Test to:
The test may be advised if you experience:
Benefits of the DLC Blood Test:
A CBC measures the total number of blood cells, including white blood cells, red blood cells, and platelets. A DLC provides detailed information about different types of white blood cells.
ANC (Absolute Neutrophil Count) measures the actual number of neutrophils in blood and helps assess infection-fighting ability.
Yes, allergies can increase eosinophil levels, which may be detected through a DLC Test.
The frequency depends on your health condition, symptoms, medical history, and doctor's recommendation.
A DLC Test cannot diagnose cancer by itself, but abnormal white blood cell patterns may help doctors identify conditions requiring further evaluation.
