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Test Code OAPNS Ova and Parasite Examination, Non-Stool

Advisory Information

If specimens are suspected of containing tapeworm segments or other adult worms or worm segments, the suspected worm should be placed in 70% alcohol and submitted for PARID / Parasite Identification.


If microsporidia are suspected, request MTBS / Microsporidia Stain instead.


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


Urine specimens should be sent for SHUR / Schistosoma Exam, Urine or TVRNA / Trichomonas vaginalis by Nucleic Acid Amplification, as applicable.


If scabies is suspected, submit skin scrapings for PARID / Parasite Identification.


Duodenal aspirates, small bowel aspirates, or colonic washings should be placed in Ecofix in a ratio of 1:1 and OAP / Parasitic Examination should be requested.


Preserved stool analysis should be requested under OAP / Parasitic Examination.

Necessary Information

Specify on the order if a specific parasite is suspected.

Specimen Required

Specimen Type: Bile

Container/Tube: Sterile container

Specimen Volume: Entire collection


Specimen Type: Bone marrow

Container/Tube: Lavender top EDTA and/or slides

Specimen Volume: 4 mL

Collection Instructions:

1. Bone marrow and/or slides will be accepted for this test.

2. If submitting slides with EDTA tube, label and bag specimens together. Submit to lab refrigerate as 1 collection.


Specimen Type: Spinal fluid

Container/Tube: Sterile container

Specimen Volume: 1 mL


Specimen Type: Fluid, abscess, drainage material

Sources: Abdominal, ascites, brain, cyst, liver, lymphatic, peritoneal, splenic

Container/Tube: Sterile container

Specimen Volume: 15 mL

Collection Instructions:

1. Place half of collection into preservative (Ecofix or PVA and Formalin) in a ratio of 1:1.

2. Place other half of collection in a sterile container.

3. Label both specimens, bag together, and submit to lab refrigerate as 1 collection.


Specimen Type: Respiratory specimens including bronchial washing, bronchoalveolar lavage, sputum

Container/Tube: Sterile container

Specimen Volume: Entire collection


Specimen Type: Tissue

Sources: Bladder, brain, colon, intestine, liver, lymph node, lung, muscle, rectal, spleen

Container/Tube: Sterile container

Specimen Volume: 5-10 mm

Collection Instructions: Place specimen in 1 to 2 drops of sterile saline to keep tissue moist.


If not ordering electronically, complete, print, and send a Gastroenterology and Hepatology Client Test Request (T728) with the specimen. 

Useful For

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

Reflex Tests

Test ID Reporting Name Available Separately Always Performed
BCON Concentrate Exam No, (Bill Only) No
BDIR Direct Prep Exam No, (Bill Only) No
BTRI Stain Slide Exam No, (Bill Only) No
FILB Filaria Bill Only No, (Bill Only) No

Testing Algorithm

Reflex testing will be added and performed by the laboratory based on the following criteria:

-Specimen source

-Specimen type: Unpreserved, refrigerate versus preserved

-Indication of parasites suspected

Method Name


May include a touch/tease preparation, direct wet preparation, concentrated wet preparation, and/or permanent (trichrome or Giemsa) stained preparation.

Reporting Name

Ova and Parasite Exam, Non-Stool

Specimen Type


Specimen Minimum Volume

Respiratory specimens, spinal fluid, abscess, or drainage material: 0.5 mL
Tissue: 3 mm

Specimen Stability Information

Specimen Type Temperature Time
Varies Refrigerated 5 days

Reference Values


If positive, organism identified

Day(s) and Time(s) Performed

Monday through Friday; 8 a.m.-5 p.m.

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Test Classification

This test was developed and its performance characteristics 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

87015-Concentration (any type), for infectious agents (if applicable)

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

87210-Wet mount for infectious agents (if applicable)

87207-Smear, primary source, with interpretation; special stain for inclusion bodies or intracellular parasites (if applicable)

LOINC Code Information

Test ID Test Order Name Order LOINC Value
OAPNS Ova and Parasite Exam, Non-Stool 673-4


Result ID Test Result Name Result LOINC Value
OAPNS Ova and Parasite Exam, Non-Stool 673-4