Gram Stain Bacteria Identification by Probe (Blood Culture)
This test helps detect and identify bacteria present in your blood sample using a molecular probe method. It’s often used when you have signs of infection, such as fever or chills, and doctors suspect bloodstream infection.
["A quick way to check for bacterial infections in your bloodstream with advanced molecular testing."]
Key facts at a glance
- LOINC
- 88261-3
- Short code
- GP bact Bld Pos Probe-Imp
- Synonyms
- GP bact Bld Pos Probe-Imp
- Category
- chemistry
- Sample
- whole-blood
- Container
- Lavender-top (EDTA)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- probe
- 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
What This Test Does
The test uses a specialized probe to detect genetic material from bacteria in your blood. This method is faster than traditional culture methods and can help confirm or rule out bacterial infections early in your care.
How the Test Works
Your blood sample is processed to isolate bacteria. The probe targets bacterial DNA or RNA, allowing for quick identification of specific bacteria types. This is particularly useful for guiding antibiotic treatment decisions.
When This Test Might Be Ordered
Your healthcare provider may recommend this test if you have symptoms like fever, low blood pressure, or other signs of infection, especially if you’re at higher risk (e.g., weakened immune system, recent surgery, or severe illness).
What to Expect Before the Test
No special preparation is needed. You’ll have a small needle inserted into your vein (usually in your arm) to draw blood. The process is quick and typically painless, though you may feel a brief pinch.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Short name
Blood Culture Gram Stain Probe
Frequently asked questions
How quickly and accurately this test identifies bacteria can influence your treatment plan. Early detection helps doctors choose the right antibiotics to target the infection effectively, reducing the risk of complications or antibiotic resistance.
What does a positive result mean?
Can this test detect viruses or fungi?
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