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LAB TEST & PROCEDURES
Title : Blood counts |
| Total White Blood Cells |
White cells play an important role in providing immunity and resistance to infection. The four main types of white cells present in the blood are the polymorphs, lymphocytes, monocytes and eosinophils. The total white blood cells count gives an approximation of the total number of white cells circulating in the blood. An increase in white cell count may be related to physiologic conditions such as exercise, or due to infections or blood disorder. In leukaemia, the white blood cells will be markedly raised. |
Reference range: 4.00 - 11.00 x 109/L
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Total Red Blood Cells |
Differential Count |
White blood cells consist of four main types, namely polymorphs, lymphocytes, monocytes and eosinophils. Each type has its own unique role. The aim of the differential count is to obtain the percentage of each type of white cells. Although their common role is to provide immunity and fight against infection, each type will respond differently to different types of infection:
Polymorphs will respond to bacterial infection
Lymphocytes will respond to viral infection
Monocytes play a vital role in many host defence mechanisms and are responsive to subacute and chronic inflammation.
Eosinophils will respond to parasitic infection and allergic reactions.
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| Reference range:-
Polymorphs : 2.00 - 7.50 x 109/L
Lymphocytes : 1.50 - 4.00 x 109/L
Monocytes : 0.20 - 0.80 x 109/L
Basophils : 0.00 - 0.10 x x 109/L
Eosinophils : 0.04 - 0.4 x 109/L |
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