UW Hospital and Clinics Lab Test Directory
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AFB, Gastric Lavage
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| Test Code(s): |
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AFB / HCAFB
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| CPT Code(s): |
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87015, 87206, 87116
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| Test Description: |
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Test Component: Acid fast stain and culture with identification for mycobacteria. Species identification may include HPLC, DNA probes, biochemical testing, growth characteristics, and gene sequencing. Mycobacterial susceptibility available based on species isolated.
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| Methodology: |
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Microscopy and Culture
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| Testing Site: |
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Testing will be sent to an approved reference laboratory.
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| Days Performed: |
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Mon-Fri.
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| Turnaround Time: |
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Routine: Smear/Stain: 1 - 3 days. Final report: 1 - 8 weeks.
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Specimen Requirements
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| Specimen: |
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Gastric lavage
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| Collection Instructions: |
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Collect fasting gastric lavage soon after patient awakens to obtain sputum swallowed during sleep. Immediately neutralize gastric lavage by placing in State Lab Gastric collection kit containing buffer (CS Item# 2200233). Collect 3 specimens on DIFFERENT days.
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| Collection Container: |
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Preferred: State Lab Gastric collection kit
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| Sample Analyzed: |
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Gastric lavage
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| Volume Required: |
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Preferred: 5 - 10 mL
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| Specimen Transport: |
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Transport specimen to UWHC Core Laboratory (B4/220).
Transport to laboratory as soon as possible. Refrigerate if submission of specimen is delayed.
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| Unacceptable Criteria: |
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Specimens that have not been neutralized (buffered) are not acceptable. (Use CS Item# 2200233)
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Interpretation
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| Additional Information: |
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Culture results include: Negative; Species identification when mycobacterial growth is detected; Culture overgrown with non-acid fast organisms.
Mycobacterial susceptibility testing recommended for M. tuberculosis isolates.
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Mycobacteria
Acid Fast Bacillus
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