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Test Mnemonic STOPSD Parasitic Examination

Additional Codes

Mayo Test ID
OAP

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

Fecal


Advisory Information


See OAPNS / Ova and Parasite Examination, Non-Stool for the submission of non-stool sources for ova and parasitic examination.

 

If specific organisms or disease states are suspected, see below:

If Acanthamoeba is suspected, order ACARP / Acanthamoeba species Molecular Detection, PCR, Ocular.

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

If Cyclospora is suspected, order CYCL / Cyclospora Stain.

If free-living amebae are suspected, order FLARP / Free-Living Amebae Molecular Detection, PCR, Spinal Fluid, Fresh and Paraffin Tissue.

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

If microsporidia are suspected, order LCMSP / Microsporidia species, Molecular Detection, PCR.

If pinworm is suspected, order PINW / Pinworm Exam, Perianal.

If scabies is suspected, order PARID / Parasite Identification.

If Schistosoma is suspected, order SHUR / Schistosoma Exam, Urine.

If Trichomonas vaginalis is suspected, order TVRNA / Trichomonas vaginalis by Nucleic Acid Amplification.

If worms or worm segments are submitted, order PARID / Parasite Identification.



Additional Testing Requirements


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.



Specimen Required


Patient Preparation: Specimen collection should be delayed for 7 to 10 days after administration of barium, bismuth, kaolin, magnesia, castor oil or mineral oil, and 2 to 3 weeks after antibiotics have been given since these may interfere with identification of protozoa.

Specimen Type: Stool, duodenal aspirate, colonic washing

Supplies: ECOFIX Stool Transport Vial (Kit) (T219)

Preferred: ECOFIX preservative (T219)

Acceptable: 10% Buffered Formalin Stool Transport plus Polyvinyl Acetate (PVA) Stool Transport

Specimen Volume: Portion of stool; or entire collection of intestinal specimen

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.

c. Duodenal aspirates, small bowel aspirates, or colonic washings should be placed in Ecofix in a ratio of 1:1

Additional Information: Stool placed in 10% buffered formalin can be accepted if accompanied by a PVA-preserved specimen; 10% buffered formalin-preserved specimens submitted without an accompanying PVA-preserved specimen will be canceled.


Specimen Minimum Volume

5 mL

Specimen Stability Information

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

Reference Values

Negative

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

Microscopic

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

Gastroenterology and Hepatology Test Request Form (T728) (http://www.mayomedicallaboratories.com/it-mmfiles/gastroenterology-and-hepatology-test-request.pdf)