Eosinophils are specialized white blood cells that curb infection and boost inflammation. If you have too many, it’s called eosinophilia. Learn how EOS blood tests can help diagnose allergic ...

An examination of the blood smear (or film) may be requested by physicians or initiated by laboratory staff. With the development of sophisticated automated blood-cell analyzers, the proportion of ...

Blood eosinophilia was present in all cases, but was only of moderate degree, and never equaled the degree of pleural-fluid eosinophilia.

Eosinophils are a type of white blood cell and part of the immune system. They fight harmful pathogens such as bacteria and parasites, but can also cause inflammation.

Eosinophilic leukemia is a cancer of the blood characterized by a high number of white blood cells, called eosinophils. Learn about symptoms, diagnosis, treatment, and outlook for this condition.

First identified in 1989, eosinophilia-myalgia syndrome is a rare condition that produces inflammation in the muscles, lungs, and skin.

Eosinophilic asthma is an uncommon form of asthma that happens if you have too many of a type of white blood cell called an eosinophil. And the best place to check for eosinophils is in your ...

Noncancerous blood disorders include clotting disorders, bleeding disorders, various forms of anemia, and eosinophilic disorders.

A blood smear is a test that counts red blood cells, white blood cells, or platelets and assesses their size, shape, and any changes to their appearance. A sample of blood is drawn and examined ...

Eosinophilia refers to an absolute peripheral blood eosinophil count of over 500/µL. With such a finding, a step-by-step diagnostic evaluation is required.

What might low eosinophil levels suggest? Learn more about a low eosinophil count, including symptoms, possible causes, and treatment options.

A blood differential test, also known as a white blood cell count differential, measures the number of different types of white blood cells in your blood.