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Mayo Clinic Laboratories

Epic Code LAB258 Giardia/Cryptosporidium Screen

Important Note

Giardia/Cryptosporidium screen is not recommended on patients who have been hospitalized more than three days. Beyond the three days, the yield of ova and parasites or intestinal pathogens is very low, with recommendation to order C. difficile toxin testing or consult Infectious Disease.

Test Name Alias

Ova and Parasite Screen (routine) | O and P Screen | Giardia/Cryptosporidium Screen | 8855

Interface Order Alias

50025

Icons & Photos

SAF Fixative Container (Clear Liquid Preservative) - Stool Specimen Kit

Specimen Requirements

Specimen Type: Stool
Container/Tube: SAF Fixative container (clear liquid preservative) of the stool specimen collection kit, Formalin or ECOFIX
Volume: Fill to the line on the container
Minimum volume: 5 mL
Collection Instructions: Collect specimen and transfer to the SAF Fixative container (clear liquid preservative) of the stool specimen collection kit within 30 minutes of the bowel movement.

 

1. Collect the specimen in a dry, clean lab approved container. 

Do not contaminate the stool specimen with urine or scoop sample from the toilet bowl. 

2. Transfer the specimen to the container within 30 minutes of the bowel movement.

3. Containers include a liquid. Do not discard this liquid. Fill the vial until the liquid reaches the line on the label. Do not overfill. For small sample volume, remove some of the media and then add stool, trying to maintain the 1 to 3 ratio of stool to media.

Note: If the stool is liquid, transfer the specimen by pouring it from the clean container into the testing vials. If the stool is solid, use the scoop provided with each vial, to transfer the specimen to the testing vials to the line on the label. 

4. If you have several vials to fill, you may fill as many as you can off the same bowel movement as long as they don’t have the same colored top.

5. Label all containers with your full name, date of birth, and date and time of collection. Be sure the caps are secured. Place containers in a paper sack.

6. Deliver to your doctor’s office or to the lab ASAP (within 24 hours).
 

Caution: The liquid is poisonous. Do not splash or spill. Keep out of the reach of children.

 

Specimen Transport Temperature

Ambient or refrigerated

Rejection Criteria

Submitted without fixative

Specimen Stability

Ambient: Send to Laboratory as soon as possible

Laboratory Retention: 3 days

Test Frequency

Available Monday - Friday, usual TAT 1 – 2 days.

Reference Range

Negative for Cryptosporidium and Giardia

Performing Department

Microbiology

Performing Department Laboratory Location

Corewell Health Reference Laboratory, Grand Rapids, MI

Methodology

EIA (Enzyme Immunoassay) 

CPT

87329, 87328

CDM Code

3068732901, 3068732801

Epic Test ID

1230101005

Mayo Access Code

SHO8855

Reviewed Date

3/24/2025