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What is Absolute Eosinophils in Blood Test

03 Apr 2023 by Admin
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When you go for a blood test, you may see a lot of different terms and values on your lab report. One of these values is absolute eosinophils, which is a type of white blood cell that plays an important role in the immune system. In this blog post, we’ll take a closer look at what absolute eosinophils are, what they indicate in a blood test, and what factors can affect their levels.

What Are Eosinophils?

Eosinophils are a type of white blood cell that are responsible for fighting off infections and parasites. They are part of the immune system and are produced in the bone marrow before being released into the bloodstream.

Eosinophils are most commonly associated with allergies and asthma, as they are involved in the immune response to allergens. When an allergen enters the body, eosinophils are activated and release substances that cause inflammation and mucus production. This can lead to symptoms such as coughing, sneezing, and itching.

In addition to their role in allergies and asthma, eosinophils are also involved in the immune response to parasitic infections. They can destroy parasites by releasing toxic substances, and they can also help to regulate the immune response.

What Are Absolute Eosinophils?

Absolute eosinophils, also known as the eosinophil count, is a measurement of the number of eosinophils in a sample of blood. This value is reported as the number of eosinophils per microliter of blood (cells/μL).

The absolute eosinophil count is different from the percentage of eosinophils, which is another value that may be reported on a blood test. The percentage of eosinophils is the proportion of white blood cells that are eosinophils, and it is reported as a percentage of the total white blood cell count.

What Is a Normal Absolute Eosinophil Count?

The normal range for absolute eosinophil count is typically between 0 and 450 cells/μL, although this can vary slightly depending on the laboratory that performs the test. If your absolute eosinophil count falls within this range, it is considered to be within normal limits.

However, it’s important to note that the normal range can vary depending on a person’s age, sex, and other factors. In some cases, a slightly elevated eosinophil count may still be within the normal range for that person.

What Does a High Absolute Eosinophil Count Mean?

A high absolute eosinophil count, also known as eosinophilia, can be a sign of several different conditions. Some of the most common causes of eosinophilia include:

  • Allergies: Allergic reactions can cause eosinophils to increase in number as part of the immune response. This is most commonly seen in people with asthma or hay fever.
  • Parasitic infections: Eosinophils play a key role in the immune response to parasitic infections. If you have a parasitic infection, your eosinophil count may be elevated.
  • Autoimmune diseases: Some autoimmune diseases, such as rheumatoid arthritis and systemic lupus erythematosus (SLE), can cause eosinophilia.
  • Skin conditions: Certain skin conditions, such as eczema and psoriasis, can lead to an increase in eosinophils.
  • Medications: Some medications, such as antibiotics and anti-seizure drugs, can cause eosinophilia as a side effect.

In some cases, a high eosinophil count may be a sign of a more serious condition, such as a blood cancer or a rare autoimmune disease called hypereosinophilic syndrome. However, these conditions are relatively rare.

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