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
  • Dermatitis Herpetiformis
  • Asthma
  • Parasite Infection
  • Non-Hodgkin's Lymphoma
  • Leukemia
  • Hodgkin's Lymphoma
  • Collagen Vascular Disease

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:
chronic dry cough
history of herbicide exposure
slight diffuse bone pain
recent onset nausea
low lymphocyte count
non-Hodgkin's lymphoma
night sweats
shortness of breath when at rest
having very low melatonin levels
no blood in nipple discharge
easy bruising
occassional 'chills'
... and more than 40 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
Leukemia 97% Confirm
Hodgkin's Lymphoma 29% Unlikely
Parasite Infection 20% Unlikely
Non-Hodgkin's Lymphoma 5% Ruled out
Asthma 2% Ruled out
Drug Side-Effects 1% Ruled out
Dermatitis Herpetiformis 0% Ruled out
Collagen Vascular Disease 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.