Your Eosinophil Count

What Causes Abnormal Eosinophil Count?

Abnormal eosinophil count can have various causes, ranging in severity from 'worrying' to 'generally fatal'.  Finding the true cause means ruling out or confirming each possibility – in other words, diagnosis.

Diagnosis is usually a complex process due to the sheer number of possible causes and related symptoms.  In order to diagnose abnormal eosinophil count, we could:
  • Research the topic
  • Find a doctor with the time
  • Use a diagnostic computer system.
The process is the same, whichever method is used.

Step 1: List all Possible Causes

We begin by identifying the disease conditions which have "abnormal eosinophil count" as a symptom.  Here are eight of many possibilities (more below):
  • Drug Side-Effects
  • Cirrhosis Of The Liver
  • Asthma
  • Weakened Immune System
  • Vasculitis
  • Leukemia
  • Addison's Disease
  • Hay Fever

Step 2: Build a Symptom Checklist

We then identify all possible symptoms and risk factors of each possible cause, and check the ones that apply:
hay fever
blood clotting problems
having vasculitis
significant diesel exhaust exposure
being short of breath when inactive
having elevated melatonin levels
frequent infections
diffuse bone pain
edema of the abdomen
regularly feeling unusually cold
itchy skin
night sweats
... and more than 50 others

Step 3: Rule Out or Confirm each Possible Cause

A differential diagnosis of your symptoms and risk factors finds the likely cause of abnormal eosinophil count:
Cause Probability Status
Weakened Immune System 94% Confirm
Vasculitis 26% Unlikely
Leukemia 29% Unlikely
Asthma 2% Ruled out
Hay Fever 2% Ruled out
Addison's Disease 1% Ruled out
Drug Side-Effects 0% Ruled out
Cirrhosis Of The Liver 0% Ruled out
* This is a simple example to illustrate the process

Arriving at a Correct Diagnosis

The Analyst™ is our online diagnosis tool that learns all about you through a straightforward process of multi-level questioning, providing diagnosis at the end.

If you indicate having had recent lab tests, The Analyst™ will ask further questions including this one:
White blood Cells - Eosinophil Percentage [fraction]
Possible responses:
→ Don't know
→ 0 to 6% [0.00-0.06] (normal)
→ 7 to 10% [0.07-0.10] (slightly elevated)
→ 11-20% [0.11-0.20] (elevated)
→ Over 20% [0.20] (high)
Based on your response to this question, which may indicate normal eosinophil count, slightly elevated eosinophil count, elevated eosinophil count or highly elevated eosinophil count, The Analyst™ will consider possibilities such as:
Hodgkin's Lymphoma

Hodgkin's lymphoma often causes severe eosinophilia.


Acute Eosinophilic Leukemia (AEL) is a rare subtype of acute myeloid leukemia in which most of the cells in the blood and marrow are eosinophilic cells.  Chronic Eosinophilic Leukemia (CEL) is a disease in which too many eosinophils are made in the bone marrow.

Non-Hodgkin's Lymphoma

As with Hodgkin's lymphoma, non-Hodgkin's lymphoma causes eosinophilia (elevated eosinophil levels), but to a lesser degree.