Microorganism Identification (Qualitative) via Culture and Sensitivity Testing (Blood)
This test checks for the presence of bacteria or fungi in your blood, which may indicate an infection. It involves growing samples from your blood in a lab to identify any harmful microbes.
["Blood cultures help diagnose infections that could require antibiotics or other treatments."]
Key facts at a glance
- LOINC
- 49034-2
- Short code
- Microorganism Cvx/Vag Cyto
- Synonyms
- Microorganism Cvx/Vag Cyto
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Ref low
- 80
- Ref high
- 100
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- cyto-stain
- 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
How the Test Works
Your blood sample is collected and split into separate containers. These containers are then placed in special growth media where any bacteria or fungi present will multiply over time. After a few days, lab technicians examine the cultures to see if any microbes have grown and identify them if possible.
When You Might Need This Test
Doctors may order a blood culture if you have symptoms like fever, chills, or unexplained infections, especially if you have a weakened immune system, recent surgery, or a medical device like a catheter.
Preparation for the Test
No special preparation is needed for this test. You may feel slight discomfort from the needle used to draw blood, but it usually goes away quickly.
What to Expect After the Test
After the blood is drawn, you can return to your normal activities. Results may take several days to a week, depending on the growth and identification process.
Reference range
Adult: 80-100 fLN/A
No special preparation usually required. Stay well hydrated. Inform your healthcare provider of all medications and supplements you are taking.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Positive results indicate the presence of an infection caused by bacteria or fungi. Identifying the specific microorganism helps guide appropriate treatment, such as targeted antibiotics. Negative results mean no obvious infection was found in the sample, but further evaluation may still be needed if symptoms persist.
Short name
Blood Culture Screening
Frequently asked questions
Why might my doctor order a blood culture?
How long will it take to get my results?
Can I have false-positive results?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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