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Fungal Screen (Serum/Plasma) with Microscopic Examination

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

This test checks for signs of fungal infections in your blood by examining a sample of your serum or plasma under a microscope and using a culture method.

Quick summary

["A fungal blood culture helps detect infections caused by yeasts or molds that may require treatment."]

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

Key facts at a glance

LOINC
104599-6
Short code
Fungal Susc Pnl Islt MIC
Synonyms
Fungal Susc Pnl Islt MIC
Category
coagulation
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
mic
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

What This Test Measures

The test involves collecting a blood sample and analyzing it for the presence of fungal organisms. Microscopic examination looks for fungal cells, while culture helps identify specific types of fungi that may be causing an infection.

Why It’s Ordered

Your healthcare provider may order this test if you have symptoms like fever, chills, or fatigue that could indicate a fungal infection, especially if you have a weakened immune system or underlying health conditions that increase risk.

Sample Collection and Preparation

A blood sample is drawn from a vein, usually in your arm. The blood is then processed to separate serum or plasma, which is sent to the lab for microscopic inspection and fungal culture.

What to Expect Before the Test

No special preparation is needed, but inform your provider about any medications you’re taking, especially those that affect blood clotting or immune function.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Fungal Blood Culture Screen

Frequently asked questions

Early detection of fungal infections is crucial for prompt treatment, which can prevent severe complications or even life-threatening conditions in vulnerable patients.
This test helps confirm or rule out fungal infections by identifying fungal cells or growth in your blood sample, guiding treatment decisions.
How long does it take to get results from this test?
Results can take several days to a week or longer, depending on whether the culture needs to grow fungal organisms. Your provider will discuss findings with you once available.
Can I eat or drink before this test?
You can eat and drink normally unless instructed otherwise by your provider, as no special fasting is required for this test.
  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