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Eosinophil (EOS) Count Blood Test

The eosinophils (EOS) count blood test checks the number of white blood cells called eosinophils in the blood.

Sample Report

Test Code: 005298

Also Known As: Absolute Eosinophil Count; Total Eosinophil Count; Absolute EOS

Methodology: Automated cell counter

Preparation: No special preparation required.

Test Results: 1-2 days. May take longer based on weather, holiday or lab delays.

Sample Report

Test Code: 425

Also Known As: Absolute Eosinophil Count; Total Eosinophil Count; Absolute EOS

Methodology: Electronic Cell Sizing/Counting/Cytometry/Microscopy

Preparation: No special preparation required.

Test Results: 1-2 days. May take longer based on weather, holiday or lab delays.

Description

Eosinophils are a type of white blood cell that helps to tackle disease. It is not clear the exact function of eosinophils in the body, but they are generally associated with allergic diseases and some infections. They are produced in the bone marrow and then spread to various tissues. 

Eosinophils are responsible for two crucial things in the immune system: curb infections and increase inflammation, which can help fend off disease. For eosinophils, the key is to do their work and then go away. But if for a long time, there are too many eosinophils in the body, this is called eosinophilia. It can cause chronic inflammation that can cause tissue damage. 

A high number of eosinophils are often associated with a variety of disorders, including:

  • Adrenal gland deficiency
  • Parasite infection, such as worms
  • Allergic disease, including hay fever
  • Lymphoma
  • Asthma
  • Leukemia and other blood disorders
  • Hereosinophilic syndrome
  • Autoimmune diseases
  • Fungal infections
  • Eczema
  • Fungal infections

A low eosinophil count could be caused by:

  • Overproduction of certain steroids in the body
  • Alcohol intoxication

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