Microbiological culture and sensitivity for blood (aerobic and anaerobic)
This test helps detect and identify bacteria or fungi in your blood, which can indicate infections like sepsis or bloodstream infections. It’s used to guide appropriate antibiotic treatment.
["Blood cultures help pinpoint infections and ensure you get the right treatment quickly."]
Key facts at a glance
- LOINC
- 88115-1
- Short code
- Rnd Cells Smn Ql Micro
- Synonyms
- Rnd Cells Smn Ql Micro
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- microscopy-light
- 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 Blood Cultures Detect
Blood cultures are taken from a blood sample drawn into special tubes that support bacterial growth. The sample is then divided into separate containers to test for both aerobic (oxygen-loving) and anaerobic (oxygen-hating) bacteria or fungi. If an infection is present, these microorganisms will grow in the culture media over time, allowing healthcare providers to identify the specific type of germ causing the infection.
How the Test Works
The test involves collecting blood in sterile containers and incubating them under controlled conditions to allow microbial growth. Sensitivities are later tested to determine which antibiotics would be most effective against the identified organism.
When Blood Cultures Are Needed
Blood cultures are typically ordered if you have symptoms like fever, chills, rapid heartbeat, or confusion, which may signal an infection. They are also used in cases of suspected sepsis, severe infections, or before starting antibiotic therapy to confirm or rule out bloodstream infections.
Preparation for the Test
No special preparation is needed for blood cultures. You may have a small bruise or redness at the injection site, but this is normal and will resolve shortly after.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Short name
Blood Culture Screening
Frequently asked questions
How long does it take to get results from a blood culture?
What does a positive blood culture mean?
Can blood cultures be done at home?
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