OAP - Specimen: Parasitic Examination

Test Catalog

Test ID: OAP    
Parasitic Examination

Testing Algorithm Delineates situation(s) when tests are added to the initial order. This includes reflex and additional tests.

The following algorithms are available in Special Instructions:

-Parasitic Investigation of Stool Specimens Algorithm

-Laboratory Testing for Infectious Causes of Diarrhea

Specimen Type Describes the specimen type needed for testing


Specimen Required Defines the optimal specimen. This field describes the type of specimen required to perform the test and the preferred volume to complete testing. The volume allows automated processing, fastest throughput and, when indicated, repeat or reflex testing.

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

Microbiology Test Request Form (T244) (http://www.mayomedicallaboratories.com/it-mmfiles/microbiology_test_request_form.pdf)

General Test Request Form (T239) (http://www.mayomedicallaboratories.com/it-mmfiles/general-request-form.pdf)


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 Defines the amount of specimen required to perform an assay once, including instrument and container dead space. Submitting the minimum specimen volume makes it impossible to repeat the test or perform confirmatory or perform reflex testing. In some situations, a minimum specimen volume may result in a QNS (quantity not sufficient) result, requiring a second specimen to be collected.

5 mL

Reject Due To Identifies specimen types and conditions that may cause the specimen to be rejected









Specimen Stability Information Provides a description of the temperatures required to transport a specimen to the laboratory. Alternate acceptable temperature(s) are also included.

Specimen TypeTemperatureTime
FecalAmbient (preferred)21 days
 Refrigerated 21 days
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