Diagnostic Test Directory

Microbiology Laboratory

KOH Prep

  • LIS Mnemonic: KOH

    Collect

    ACCEPTABLE SPECIMENS INCLUDE: hair, nail or skin scrapings collected in a sterile container.

    Volume Required

    5-6 flakes of skin; 5-6 pieces of hair; 2-3 nail clippings

    Minimum Required

    5-6 flakes of skin; 5-6 pieces of hair; 2-3 nail clippings

    Transport

    Send to lab immediately at room temperature

    Stability

    Specimens stable up to 72 hours after collection

    Unacceptable conditions

    Specimens submitted on swabs are not acceptable since the cotton strands can resemble hyphae.

Days Performed

Daily

Reported

Same day

CPT

87210

Methodology

Direct Examination