Diagnostic Test Directory

Microbiology Laboratory

AFB Smear

  • Synonyms: ACID FAST SMEAR
  • LIS Mnemonic: SMAFB

    Collect

    See Remarks below and Nursing Procedures 4:4a Collection of TB specimens

    Volume Required

    See Remarks below

    Minimum Required

    See Remarks below

    Transport

    All specimens must be delivered to the laboratory promptly, within 30 minutes of collection. If this is not possible, refrigerate. Gastric aspirates must be sent immediately or will be rejected.

    Stability

    2 hours

    (Exception gastric specimens which must be sent to laboratory immediately)

    Unacceptable conditions

    Swabs are unacceptable; stool (unless diagnosis is HIV); urine in urine transport tubes; CSF volumes < 5mL



    Saliva specimens (Consult with Respiratory Therapy regarding induced sputum samples if having difficulty obtaining a sputum)

Days Performed

7 days a week

Reported

Same day

CPT

87206

Methodology

Screen: Fluorescent, Confirmatory : Kinyoun Stain