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Bacterial Culture and Sensitivity for Platelet-Rich Plasma (PRP) or Whole Blood

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

This test checks for the presence of bacteria in your platelet-rich plasma (PRP) or whole blood sample, which may be drawn for treatments like platelet-rich plasma therapy.

Quick summary

["It helps ensure your blood product is sterile before use."]

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

Key facts at a glance

LOINC
93316-8
Short code
Plt CD42b Act/Nor Bld FC
Synonyms
Plt CD42b Act/Nor Bld FC
Category
hematology
Sample
whole-blood
Container
Lavender-top (EDTA)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
flow-cytometry
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 Is Done

Your healthcare provider may order this test if you’re receiving platelet-rich plasma (PRP) therapy or have had blood drawn for other reasons. Bacterial contamination in blood products can cause serious infections, so this test helps prevent that risk.

What to Expect Before the Test

No special preparation is needed. If you’re getting PRP, your blood may be drawn in a clinic or lab, and the PRP portion will be separated and tested separately. For whole blood, a standard venipuncture is used.

What Happens During the Test

A small amount of your PRP or whole blood is sent to a lab. The sample is cultured to grow any bacteria that may be present. Results are typically available within 48–72 hours, depending on lab protocols.

What the Results Mean

If bacteria are found, your provider will discuss next steps, such as retesting or adjusting your treatment. If no bacteria are detected, your PRP or blood product is considered safe for use.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Bacterial contamination in blood or PRP can lead to infections, fever, or worsening symptoms if the product is used. This test is critical for patients undergoing procedures that rely on blood components to ensure safety.

Short name

PRP/Blood Bact/Grams

Frequently asked questions

What does a positive bacterial culture mean?
A positive result means bacteria were detected in your sample. Your provider will work with you to determine if the product needs to be discarded, retested, or treated with antibiotics before use.
How long does it take to get results?
Results typically take 48 to 72 hours, depending on the lab’s processing time. Your provider will contact you once they’re ready to discuss the findings.
Can I still use my PRP if the test is pending?
No, you should not use your PRP until the test results confirm it is free of bacteria. Your provider will guide you on the next steps based on the outcome.
  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