Aerobic C&S BAL FLUID - DD (Kirby Bauer Disc diffusion)
Also Known As
Test Parameters Included
- Aerobic Bacterial Culture and Colony Count from Bronchoalveolar Lavage Fluid (CFU/mL)
- Kirby-Bauer Disc Diffusion Antimicrobial Susceptibility Profile with Zone Diameter Interpretation (S/I/R)
- Pathologist Microbiology Remark - correlated with clinical pneumonia/bronchitis context
Department
Methodology
Sample Required
Preparation
Schedule Report
72 Hours
Emergency Report
Yes
Frequently Asked Questions
What is Aerobic C&S BAL Fluid - DD?
It is a microbiological test that cultures aerobic bacteria from bronchoalveolar lavage fluid and determines which antibiotics effectively inhibit their growth using the Kirby-Bauer disc diffusion method.
When is this test ordered?
It is performed in patients with suspected lower respiratory tract infections, hospital-acquired pneumonia, ventilator-associated pneumonia, or when bronchoscopy is indicated for diagnostic sampling.
How is the sample collected?
BAL fluid is obtained during flexible bronchoscopy by instilling sterile saline into a bronchial segment and aspirating the return. The sample must be sent in a sterile container and processed promptly.
What does the Kirby-Bauer disc diffusion method determine?
It measures the zone of inhibition around antibiotic-impregnated discs to classify organisms as Susceptible, Intermediate, or Resistant, guiding targeted antimicrobial therapy.
How long does it take to get results?
Preliminary culture results are available in 24-48 hours, with complete susceptibility profiling and final report typically within 72 hours.
Can prior antibiotic use affect the result?
Yes, recent antibiotic therapy can suppress bacterial growth and lead to false-negative culture results. Inform your doctor about all medications before testing.
Test Description
Test Code
A119
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