Yeast Culture

Test Details

Lab Company: Genova Diagnostics 
Sample Type: Stool 
Collection Location: At Home

The Yeast Culture test evaluates the concentration of yeast in your gastrointestinal system.    

🔑 Key Details 📦 Shipping
Preparation & Timing 📊 Results
🧪 Collection Instructions 📚 More Resources
💳 Requisition & Payment
💬 Questions?

Key Details 

  • This test is not recommended for patients under 2 years of age.
  • Collection can be done at any time during the day.
  • Certain medications and supplements should be avoided prior to the test (see below for details).
  • Samples must be shipped within 24 hours of collection, Monday - Thursday only.
  • DO NOT register your test online with Genova.

back to top

Preparation & Timing

  • Collection can be done at any time during the day.
  • Wait at least 4 weeks from your last colonoscopy or barium enema.
  • Avoid the following medications for 2-4 weeks prior to sample collection. 
    • Antibiotics
    • Antiparasitics
    • Antifungals
    • Probiotic supplements
  • Avoid the following medications for 2 days prior to sample collection. 
    • Aspirin and other NSAIDs (like ibuprofen)
    • Rectal suppositories
    • Enemas
    • Activated charcoal
    • Bismuth
    • Betaine HCL
    • Digestive enzymes
    • Antacids
    • Laxative
    • Mineral oil
    • Castor oil
    • Bentonite clay
  • Avoid collecting samples during menstruation.
  • Avoid collecting samples when you have actively bleeding hemorrhoids.
  • Start your sample collection Sunday - Thursday only.

back to top

Collection Instructions

  1. Write your name, date of birth, and the date of collection on each tube label.
  2. Place a label on each of the tubes and on the completed test requisition form. 
  3. Urinate prior to collection.
  4. Put on the glove.
  5. Collect your stool sample using the included collection container.
    1. Do not contaminate the sample with urine or water from the toilet.
  6. Remove the cap from the ORANGE-top tube carefully.
    1. Do NOT touch or dispose of the liquid in the tube.
  7. Transfer the stool sample into the tube using the built-in scoop until the liquid and stool reach the FILL LINE. 
    1. Collect from different areas of the sample.
  8. Mix the sample with the liquid in the tube until it is as smooth as possible.
    1. The liquid and stool must reach but not exceed the fill line.
  9. Screw the cap on tightly.
  10. Shake tube for 30 seconds.
  11. Place the tube in the biohazard bag. 
  12. Repeat steps 5-11 with the WHITE-top tube. 
    1. The WHITE-top tube does not have a liquid in it. 
  13. Peel open the swab package. 
  14. Remove the tube and place it upright.
    1. The swab should remain in the sleeve until you are ready to collect the sample.
  15. Grasp the swab above the middle notch (opposite end from the applicator tip).
  16. Insert the rounded applicator tip of the swab into the stool sample and rotate it. 
  17. Confirm that the swab is evenly coated with stool. If not, repeat step 16.
    1. Do not "spoon" the specimen with the swab.
  18. Open the swab collection tube and insert the swab.
  19. Mash and mix the rounded nylon end of the swab with stool on it against the side of the tube.
  20. Break the swab off at the break point.
  21. Place the screw cap on the tube and tighten.
  22. Shake the tube.
  23. Place the swab collection tube in the biohazard bag.
  24. Place the biohazard bag in the refrigerator.
  25. Refrigerate all of the tubes until ready to ship. 
    1. Do NOT freeze.
  26. Dispose of the remaining sample in the toilet.
  27. Put the collection container and the glove in the black disposable bag. Place the bag in the garbage.

back to top

Requisition & Payment

  • Your kit has been prepaid. You DO NOT need to pay anything extra.
  • Instructions on how to fill out your requisition can be found HERE (insurance) and HERE (cash pay).
    • Since you pre-paid for your tests, you do not need to fill in the payment information on any of these forms.
    • DO NOT register your test online with Genova.

back to top


  • Ship samples to the lab within 24 hours of the final collection.
  • Ship only Monday through Thursday. 
  • To prepare your samples for shipping, 
    • Place the biohazard bags with the tubes in the test kit box. 
    • Place the test kit box in the FedEx Clinical Pak mailer.
    • Place the completed test requisition form in the FedEx Clinical Pak mailer.
  • Make a note of the tracking number so that you can track your samples back to the lab.
  • You can schedule a pickup by calling FedEx at 1-800-463-3339 or visiting

back to top


  • Results should be released to your provider 7-10 days after samples are received at the lab. We cannot guarantee processing time. 
  • Your provider will notify you when your results are in and schedule a follow-up appointment for you to review them together. 
  • Your provider may choose to release your results to you. Rupa cannot release your results without provider authorization.

back to top

More Resources

back to top


For general questions, email Rupa Health at For test-specific questions, contact Genova Diagnostics by calling 1-800-522-4762 or chatting with support