Gram Stain Bacteria Identification (Blood Culture Qualitative Probe Impedance Method)
This test checks for the presence of bacteria in your blood using a qualitative probe method. It helps identify infections that may require antibiotics.
["A simple blood test to detect bacterial infections quickly and guide treatment decisions."]
Key facts at a glance
- LOINC
- 88259-7
- Short code
- GN bact Bld Pos Probe-Imp
- Synonyms
- GN 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 Measures
The test involves collecting a sample of your blood and applying it to a probe that detects bacterial presence through impedance. It does not measure bacterial count or specific bacteria types but confirms whether bacteria are present in your bloodstream.
How the Test Works
Your blood sample is processed to detect bacteria using a specialized probe that responds to bacterial activity. The probe measures changes in electrical impedance, which indicates the presence of bacteria. This method is typically used as a screening tool rather than a definitive identification.
Why It’s Done
This test is often used in blood culture screening to quickly identify potential bacterial infections, especially in patients with fever, signs of infection, or known risk factors for sepsis.
When Results May Be Important
Positive results suggest the presence of bacteria in your blood, which may require immediate medical attention, including antibiotic treatment. Negative results mean no bacteria were detected in this sample, but further testing may still be needed if you have symptoms of infection.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Short name
Blood Culture Gram Stain Screening
Frequently asked questions
What could cause abnormal results?
How long will I need to wait for results?
Can I do anything to prepare for this test?
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