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Bacterial Culture and Sensitivity with Specific Pathogen Identification (Serum/Plasma)

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

This test checks for the presence of bacteria in your blood or body fluids, helping doctors determine if an infection is causing your symptoms.

Quick summary

["Identifies potential infections and guides antibiotic treatment options."]

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

Key facts at a glance

LOINC
87927-0
Short code
Bacterial Susc Pnl Islt MLC
Synonyms
Bacterial Susc Pnl Islt MLC
Category
coagulation
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
mlc
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 This Test Measures

The test involves growing bacteria from your blood, urine, or other fluids to see if any pathogens are present. It also assesses how your body’s defenses (antibiotics) might respond to these bacteria, aiding in targeted treatment planning.

Why It’s Ordered

Your healthcare provider may order this test if you have signs of infection (e.g., fever, redness, pain) or if you’re at higher risk (e.g., weakened immune system, recent surgery). It helps confirm infections like sepsis or urinary tract infections.

Sample Collection and Processing

A blood sample or fluid (like urine) is collected and sent to a lab. Bacteria are grown in controlled environments to identify types and susceptibility to antibiotics.

Results Interpretation

Results take days to weeks, depending on bacterial growth. Positive results show specific bacteria; negative results mean no detectable bacteria in the sample.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Bacterial Culture Screen

Frequently asked questions

How long does this test take to return results?
Results typically take 2–7 days for preliminary identification and up to 2 weeks for full sensitivity reports, depending on lab workload and bacterial growth.
Can I take antibiotics before this test?
Yes, but inform your doctor immediately. Antibiotics may alter test results by killing bacteria or changing their presence in your sample.
Is this test painful?
Minimal discomfort is expected during blood draws or fluid collection. Most patients tolerate it well, though some may feel slight soreness afterward.
  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