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Basophil Count (Qualitative Blood Manual Method)

Published: August 9, 2026Updated: August 16, 2026

This test measures the presence and proportion of basophils, a type of white blood cell involved in allergic reactions and inflammation. Results help assess immune function and potential conditions like allergies or certain blood disorders.

Quick summary

["Basophils may rise in allergic reactions or certain blood disorders; a manual qualitative check helps identify their presence for further evaluation."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
33786-5
Short code
Imm Basophils NFr Bld Manual
Synonyms
Imm Basophils NFr Bld Manual
Category
chemistry
Sample
whole-blood
Container
Lavender-top (EDTA)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
manual-count
Specimen volume
3 mL
Stability
Room temperature: 4h, Refrigerated: 24h
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

Why This Test Might Be Ordered

Your doctor may recommend this test if you have symptoms like persistent itching, skin rashes, or unexplained allergic reactions. It could also be used to monitor conditions like chronic inflammatory diseases or blood disorders, such as myeloproliferative neoplasms.

What to Expect Before the Test

No special preparation is needed. Bring any medications or recent health updates to your doctor’s office. Avoid eating or drinking for 8 hours before blood collection if instructed, though this test does not require fasting.

How the Test Works

A small blood sample is drawn from a vein in your arm. The sample is then examined under a microscope by a trained technician to count and identify basophils. This method is qualitative, meaning it determines presence rather than precise numbers.

What the Results Mean

Results are qualitative—either confirming the presence of basophils or indicating their absence. Elevated basophil counts may signal allergic conditions, certain cancers, or chronic inflammation. Low or absent basophils may raise questions about immune function or blood disorders.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Basophil Count (Qualitative)

Frequently asked questions

What Does a High or Low Basophil Count Indicate?
An elevated basophil count can suggest conditions like allergic disorders, chronic inflammatory diseases, or rare blood cancers such as mastocytosis. Low or absent basophils may indicate immune suppression or other hematologic issues that require further medical evaluation.
How Often Should I Get This Test?
This test is typically ordered as needed based on symptoms or clinical suspicion. Your doctor will determine the frequency based on your health status and ongoing treatment.
Can I Fast Before This Test?
No, fasting is not required for this test. However, follow your doctor’s instructions regarding any medications or lifestyle adjustments before blood collection.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy