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Test Code XOAPE Parasitic Examination

Additional Codes



Reporting Name

Parasitic Examination

Useful For

Detection and identification of parasitic protozoa and the eggs and larvae of parasitic helminths

Testing Algorithm

The following algorithms are available in Special Instructions:

-Parasitic Investigation of Stool Specimens Algorithm

-Laboratory Testing for Infectious Causes of Diarrhea

Performing Laboratory

Mayo Medical Laboratories in Rochester

Specimen Type


Specimen Required

Forms: If not ordering electronically, complete, print, and send 1 of the following forms with the specimen:

Microbiology Test Request Form (T244) (

General Test Request Form (T239) (


Specimen Type: Stool, duodenal aspirate, colonic washing, liver fluid/abscess

Container/Tube: ECOFIX preservative (Supply T219)

Specimen Volume: Portion of stool; or entire collection of intestinal specimen or liver fluid/abscess

Collection Instructions:

1. Place specimen into preservative within 30 minutes of passage or collection.

2. Follow instructions on the container as follows:

a. Mix the contents of the tube with the spoon, twist the cap tightly closed, and shake vigorously until the contents are well mixed. Refer to the fill line on the Ecofix vial for stool specimens.

b. Do not fill above the line indicated on the container.


Specimen Type: Respiratory specimens or tissue

Sources: Bronchial washing, sputum, bronchoalveolar lavage

Container/Tube: Sterile container

Specimen Volume: Entire collection

Collection Instructions:

1. Place specimen into container and send refrigerate.

2. Specify on the order if a specific parasite is suspected.

Additional Information:

1. It is strongly recommended that multiple stool specimens be submitted for ova and parasite analysis. At least 3 specimens should be collected, 1 each day or on alternate days (over a maximum 10-day period). Parasites are shed irregularly in stool and examination of a single specimen does not guarantee detection.  

2. To submit worms or worm segments, place in 70% alcohol and order PARID / Parasite Identification instead of the OAP / Parasitic Examination.

a. If Cryptosporidium is suspected, order CRYPS / Cryptosporidium Antigen, Feces instead.

b. If Giardia is suspected, order GIAR / Giardia Antigen, Feces instead.

c. If Cyclospora is suspected, order CYCL / Cyclospora Stain instead.

d. If microsporidia are suspected, order MTBS / Microsporidia Stain instead.

e. If pinworm is suspected, order PINW / Pinworm Exam, Perianal instead. Perianal skin sampling using clear cellophane tape or a SWUBE device is required for this test.

3. If the sources is something other than listed in Specimen Required:

a. Urine-send for SHUR / Schistosoma Exam, Urine or TVRNA / Trichomonas vaginalis by Nucleic Acid Amplification as applicable

b. Skin scrapings-send for PARID / Parasite Identification if scabies is suspected

c. Corneal scrapings/biopsy, CSF, or brain tissue for free-living amebae (Acanthamoeba or Naegleria)-send for ACANT / Acanthamoeba/Naegleria species, Corneal Scraping or Spinal Fluid

Specimen Minimum Volume

5 mL

Specimen Stability Information

Specimen Type Temperature Time
Fecal Ambient (preferred) 21 days
  Refrigerated  21 days

Reference Values


If positive, organism identified

Day(s) and Time(s) Performed

Monday through Friday; 8 a.m.-7 p.m., Saturday; 8 a.m.-4 p.m.

Test Classification

This test uses a standard method. Its performance characteristics were determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.

CPT Code Information

87177-Concentration (any type), for infectious agents

87209-Smear, primary source with interpretation; complex special stain (eg, trichrome, iron hematoxylin) for ova and parasites

LOINC Code Information

Test ID Test Order Name Order LOINC Value
OAP Parasitic Examination 10704-5


Result ID Test Result Name Result LOINC Value
OAP Parasitic Examination 10704-5

Method Name


Includes concentrated wet preparation and permanent (trichrome) stained preparation. Also includes exam for fecal leukocytes.