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Test Code MRA Culture and Sensitivity, Respiratory

Infectious

Specimen Requirements

Submit only one of the following

 

Specimen Type: Sputum, ETT aspirate, tracheal aspirate, BAL
Container/Tube: Sterile screw-capped container
Volume: 2.0mL
Minimum Volume: 0.5mL
Collection Instructions:

 

Sputum:

  • Rinse mouth with water to remove food particles.
  • Collect 4 to 5 deep coughs into a sterile container.
  • Do not send saliva.
  • Cap container tightly, label, and send to the laboratory immediately.
  • Sputum quality will be assessed with a Gram smear. Specimens
    heavily contaminated with oral flora will be rejected.

BAL: BAL fluid is preferred to bronchial washings for bacterial culture.
 

Please indicate if extended incubation is required when slow growing bacteria such as Nocardia, Actinomyces are suspected.

 

Specimen Type: Nasal swab
Container/Tube: eSwab, M40 transystem Amies agar transport media (Copan)(for non-NUH patients)
Volume: 1 swab
Collection Instructions: Insert a sterile swab into the nose approximately 2.5cm and rotate the swab against the anterior nares. Place swab in transport medium.

 

Please refer to Test Catalogue -> Test Collection Information -> eSwab Training Slides

 

Specimen Type: Throat swab
Container/Tube: eSwab, M40 transystem Amies agar transport media (Copan)(for non-NUH patients)
Volume: 1 swab
Collection Instructions: Sample only areas of exudate, membrane formation, inflammation or tonsillar crypts. Avoid touching the tongue or other mucous surfaces.

 

Please refer to Test Catalogue -> Test Collection Information -> eSwab Training Slides

Sample Stability

** Preferred temperatures for storage prior to and during shipping to NUH **

 

Specimen Type: All types
Ambient: Submit sample to lab immediately
Refrigerate: 24 hours (Some groups of bacteria may be lost when refrigerated)
Frozen: Unacceptable

 

Reference Interval

No growth of respiratory pathogens.

Days and Times Performed

Monday through Sunday, TAT 1-6 days

Methodology

Conventional Culture

Service Code

23041

Update

Last updated 11/10/2021

Unacceptable Condition

Gastric aspirate, nasopharyngeal aspirate are not acceptable for bacterial culture.

Testing Laboratory

National University Hospital

Clinical Microbiology, 67724343

Useful For

Diagnosis of respiratory tract infections.

Test Information

A Gram smear must be ordered for Sputum and ETT aspirate.