Test Code LAB251 KOH Prep
Useful For
Detection of fungi in clinical specimens
Methodology
15% KOH Direct Prep
Performing Laboratory
Bozeman Health Laboratory Services
Specimen Requirements
Specimen source and suspected fungal species are required
Submit only 1 of the following specimens:
Specimen Type: Hair
Container/Tube: Screw-capped, sterile container
Specimen Volume: 10 to 12 hairs
Collection Instructions: Label container with patient’s name (first and last), date and actual time of collection, and type of specimen.
Specimen Type: Nails
Container/Tube: Screw-capped, sterile container
Specimen Volume: Adequate amount
Collection Instructions:
1. Wipe nail with 70% alcohol.
2. Scrape outer surface of nail and discard.
3. Collect scraping from deeper, diseased areas of nail, and place in container.
4. Label container with patient’s name (first and last), date and actual time of collection, and type of specimen.
Specimen Type: Skin scraping
Container/Tube: Screw-capped, sterile container
Specimen Volume: Adequate amount
Collection Instructions:
1. Clean skin with 70% alcohol.
2. Scrape advancing edge of lesion with a sterile glass slide into container.
3. Label container with patient’s name (first and last), date and actual time of collection, and type of specimen.
Specimen Type: Wound, Deep or Superficial, Abscess
Container/Tube: ESwab collection kit
Specimen Volume: Adequate amount
Collection Instructions:
- Prepare site, wash wound margins well with antiseptic soap, and rinse with sterile saline.
- Break surface of wound. Pass ESwab deep into abscess and sample lesion’s advancing edge, taking care to avoid contamination with other normal flora.
- Aseptically unscrew and remove the cap from the tube.
- Insert the ESwab into the tube and break the swab shaft at the breakpoint indicated by the colored line marked on the swab shaft. Discard the remaining broken portion of the swab shaft. Replace cap on the tube and secure tightly.
- Label tube with patient’s name (first and last), date, actual time of collection, and type of specimen.
Specimen Type: Tissue or Body Fluid: abdominal, ascites, bile, pericardial, peritoneal, pleural fluid, synovial fluid, serous fluid, or closed abscess.
Container/Tube: Screw-capped, sterile container
Acceptable: Syringe (needle removed)
Specimen Volume: Entire specimen
Collection Instructions:
- Disinfect overlaying skin with chlorhexidine gluconate.
- Using needle and syringe, aspirate fluid.
- Transfer entire volume of aspirated fluid to vial, container, or leave in syringe.
- If submitting specimen in syringe, remove needle and cap syringe.
- Label vial/container/syringe with patient’s name (first and last), date and actual time of collection.
Specimen Type: Spinal fluid
Container/Tube: Screw-capped, sterile CSF tube
Specimen Minimum Volume: 1 mL
Collection Instructions:
- Label tube(s) with patient’s name (first and last), date and actual time of collection, and in order of collection 1, 2, 3, etc.
- Maintain sterility and forward promptly. Do not send by pneumatic tube. This test will be performed on tube #2 or #3 of tubes submitted from spinal fluid collection.
Specimen Type: Cervix, endocervix, vaginal
Container/Tube: ESwab
Specimen Volume: Adequate amount
Collection Instructions:
- Do not use lubricant on speculum.
- Remove excess mucus, blood, and/or examination lubricants from cervix.
- Insert swab and rotate swab for 15 to 30 seconds to ensure adequate sampling.
- Return swab to transport tube.
- Label tube with patient’s name (first and last), date and actual time of collection, and type of specimen.
*Note: KOH slide testing only. Refer to Affirm testing (NBLD0373 VAGINITIS PROBE) to rule out Candida yeast infections or when a wet mount is desired.
Specimen Type: Urethra
Container/Tube: Male Urethral Swab
Specimen Volume: Adequate amount
Collection Instructions:
- Patient should not have urinated for at least 1 hour prior to specimen collection.
- Insert small-tipped specimen swab 2 cm to 4 cm into urethra and rotate swab for 3 to 5 seconds to ensure adequate sampling.
- Return swab to transport tube.
- Label tube with patient’s name (first and last), date and actual time of collection, and type of specimen.
Specimen Type: Sputum-expectorated
Container/Tube: Tightly-sealing, screw-capped, sterile container
Specimen Volume: Adequate amount
Collection Instructions:
Note: Patient should not have eaten prior to collection. Specimen should be a single, first-morning, “deep-cough” sputum specimen.
- Have patient remove dentures (if applicable).
- Instruct patient to brush his/her teeth and/or rinse mouth well with water.
- Instruct patient to take a deep breath, hold it momentarily, and cough deeply and vigorously into container.
- Label container with patient’s name (first and last), date and actual time of collection, and type of specimen.
Specimen Rejection: Nasal secretions or saliva will be rejected.
Specimen Type: Fresh raw stool
Container/Tube: CLEAN VIAL (White top vial with no added preservatives)
Acceptable: Sterile container.
Specimen Volume: 5 mL
Collection Instructions:
- Collect liquid or loose stool
- Transfer stool to container.
- Label container with patient’s name (first and last), date and actual time of collection
Specimen Type: Preserved stool (in enteric transport medium)
Container/Tube: (Cary Blair Medium) Orange top vial containing 5 ml of transport medium
Specimen Volume: 5 mL
Collection Instructions:
- Collect liquid or loose stool.
- Place enough stool in the transport media to reach the "FILL LINE" indicated on vial. DO NOT overfill the transport or dump transport media out.
- Carefully break up the specimen and swirl the contents until thoroughly mixed using the spork attached to the cap.
- Label vial with patient’s name (first and last), date and actual time of collection.
Specimen Transport Temperature
Ambient/Refrigerated
Specimen Stability
Specimen Type | Temperature | Time |
---|---|---|
Copan Swab | Ambient | 24 hours |
ESwab | Ambient |
48 hours |
NP Swab | Ambient | 24 hours |
CSF | Ambient | 1 hour |
Syringe | Ambient | 2 hours |
Bone or Body Fluid in Sterile Container | Ambient | 1 hour |
Stool in Clean Vial | Ambient | 2 hours |
Stool in Cary Blair | Ambient | 72 hours |
Sputum, BAL, Tracheal Aspirate, Bronchial Washings | Ambient | 2 hours |
Refrigerated | 24 hours | |
Skin, Hair, or Nails in sterile container | Ambient | 7 days |
Reference Values
Negative: No fungal elements observed.
Positive: Yeast present, Hyphae present, Yeast and Hyphae present
Day(s) Test Set Up
Monday through Sunday
Test Classification and CPT Coding
87210