Test Overview

Test Methodology


Test Usage

Isolate, identify and quantitate aerobic organisms.

Reference Range*

No growth of aerobic bacteria

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Test Limitations

Bronch brush is unsuitable for direct smear. BAL: Direct smear will be performed.

Test Details

Days Test Performed


Analytic Time

Preliminary results are reported in 18 - 24 hours. Negative cultures are reported after 3 days.

Soft Order Code


MiChart Code

Quantitative Respiratory Culture/Smear



Aerobe Bacterial Culture, Bronch Brush Quantitative
BAL Culture
Bronchoalveolar Lavage Culture
Quantitative Bronch Brush Aerobe Bacterial Culture
Quantitative Culture, Respiratory
Bronch Brush Quantitative, Aerobic Bacterial Culture

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Specimen Requirements

Offsite Collection Instructions

Specimen transport should be arranged so that the specimen is received by MLabs within 24 hours of collection. Call for a STAT courier or send via overnight delivery. Send BAL specimens in a sterile container with no additive, at 4 degrees C (refrigerated). Testing on bronch brush specimens is available only to University of Michigan registered patients.

Rejection Criteria

Brush not received in transport brush tube, broth received without brush, brush specimen older than 1 hour.


100ml Plastic Specimen Container

Normal Volume

1 brush or 0.5 ml (BAL)

Additional Information

Brush: All organisms isolated with 3000 or more CFU/brush will be identified. BAL: Up to 3 significant organisms at 10,000 CFU/mL will be identified. A gram negative rod in pure culture will be identified at < 10,000 CFU/mL. Test includes susceptibility testing of potentially pathogenic organism(s) at an additional charge unless specifically declined.

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