Test Id : OAPNS
Ova and Parasite, Microscopy, Varies
Useful For
Suggests clinical disorders or settings where the test may be helpful
Detecting and identifying parasitic protozoa and eggs and larvae of parasitic helminths
Reflex Tests
Lists tests that may or may not be performed, at an additional charge, depending on the result and interpretation of the initial 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
Delineates situations when tests are added to the initial order. This includes reflex and additional tests.
Reflex testing will be added and performed at an additional charge by the laboratory based on the following criteria:
-Specimen source
-Specimen type: Unpreserved, refrigerate versus preserved
-Indication of parasites suspected
Method Name
A short description of the method used to perform the test
Microscopic
May include Touch/Tease Preparation, Direct Wet Preparation, Concentrated Wet Preparation, Permanent (Trichrome or Giemsa) Stained Preparation
NY State Available
Indicates the status of NY State approval and if the test is orderable for NY State clients.
Reporting Name
Lists a shorter or abbreviated version of the Published Name for a test
Aliases
Lists additional common names for a test, as an aid in searching
Amoeba, Ameba
Egg Cyst
Helminth Echinococcus
O and P (Ova and Parasites)
Ova
Parasites
Parasitic Exam
Protozoa
Trichrome Stain
Testing Algorithm
Delineates situations when tests are added to the initial order. This includes reflex and additional tests.
Reflex testing will be added and performed at an additional charge by the laboratory based on the following criteria:
-Specimen source
-Specimen type: Unpreserved, refrigerate versus preserved
-Indication of parasites suspected
Specimen Type
Describes the specimen type validated for testing
Varies
Ordering Guidance
If specimens are suspected of containing tapeworm segments or other adult worms or worm segments, place the suspected worm in 70% alcohol and order PARID / Parasite Identification, Varies.
If microsporidia are suspected:
-For non-stool/non-urine specimen, order MTBS / Microsporidia Stain, Varies
-For feces or urine, order LCMSP / Microsporidia species, Molecular Detection, PCR, Varies
If pinworm is suspected, order PINW / Pinworm Exam, Perianal. Perianal skin sampling using clear cellophane tape or a SWUBE device is required for this test.
Urine specimens should be sent for SHUR / Schistosoma Exam, Random, Urine or TVRNA / Trichomonas vaginalis, Nucleic Acid Amplification, Varies as applicable.
If scabies is suspected, submit skin scrapings and order PARID / Parasite Identification, Varies.
For preserved stool analysis, order OPE / Ova and Parasite, Travel History or Immunocompromised, Feces.
Necessary Information
1. Specify on the order if a specific parasite is suspected.
2. Indicate source on the label of the specimen.
ORDER QUESTIONS AND ANSWERS
| Question ID | Description | Answers |
|---|---|---|
| Q00M0045 | Specimen Source |
Specimen Required
Defines the optimal specimen required to perform the test and the preferred volume to complete testing
Submit only 1 of the following specimens:
Specimen Type: Bile
Container/Tube: Sterile container
Specimen Volume: Entire collection
Specimen Stability Information: Refrigerate 5 days
Specimen Type: Bone marrow
Container/Tube: Lavender top (EDTA) and/or slides
Specimen Volume: 4 mL EDTA and/or 1 slide (unstained preferred)
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. Send refrigerate as one collection.
Specimen Stability Information: Refrigerate 5 days
Specimen Type: Colonic washing
Container/Tube:
Preferred: ECOFIX preservative
Acceptable: 10% Buffered formalin AND zinc polyvinyl alcohol (Zn PVA) (one vial of each)
Specimen Volume: at least 2 mL
Collection Instructions:
1. Place specimen into preservative within 30 minutes of collection.
2. Follow instructions on the container as follows:
a. Colonic washings should be placed into ECOFIX preservative vial (or 10% formalin and Zn-PVA vials) in a ratio of 1 part preservative:1 part specimen. Some preservative may need to be removed from the vial to maintain this ratio.
b. Place washings into vial, twist the cap tightly closed, and shake vigorously until the contents are well mixed.
c. Do not fill above the fill line indicated on the preservative container.
Specimen Stability Information: Ambient (preferred)/Refrigerate 5 days
Specimen Type: Duodenal aspirate
Preferred: ECOFIX preservative
Acceptable: 10% Buffered formalin AND Zn PVA (one vial of each)
Specimen Volume: at least 2 mL
Collection Instructions:
1. Place specimen into preservative within 30 minutes of collection.
2. Follow instructions on the container as follows:
a. Duodenal aspirate should be placed into ECOFIX preservative vial (or 10% formalin and Zn-PVA vials) in a ratio of 1 part preservative:1 part specimen. Some preservative may need to be removed from the vial to maintain this ratio.
b. Place washings into vial, twist the cap tightly closed, and shake vigorously until the contents are well mixed.
c. Do not fill above the fill line indicated on the preservative container.
Specimen Stability Information: Ambient (preferred)/Refrigerate 5 days
Specimen Type: Spinal fluid
Container/Tube: Sterile container
Specimen Volume: At least 1 mL
Specimen Stability Information: Refrigerate 5 days
Specimen Type: Fluid, abscess, drainage material
Sources: Abdominal, ascites, brain, cyst (must specify anatomical location of cyst), liver, lymphatic, peritoneal, splenic
Container/Tube: Sterile container AND either ECOFIX preservative vial or one zinc (Zn)-PVA AND one 10% formalin vial
Specimen Volume: 15 mL
Collection Instructions:
1. Place half of collection into preservative (either ECOFIX or PVA and 10 % Formalin combo) in a ratio of 1 part preservative: 1 part specimen. Some preservative may need to be removed from the vial to maintain this ratio.
2. Label the preservative type on the side of each vial.
3. Place other half of collection in a sterile container.
3. Label both specimens, bag together, and send refrigerate as one collection.
Specimen Stability Information: Refrigerate 5 days
Specimen Type: Respiratory
Source: Bronchial washing, bronchoalveolar lavage, sputum
Container/Tube: Sterile container
Specimen Volume: Entire collection
Specimen Stability Information: Refrigerate 5 days
Specimen Type: Tissue
Sources: Bladder, brain, colon, intestine, liver, lymph node, lung, muscle, rectal, spleen (must specify anatomical location of tissue)
Container/Tube: Sterile container
Specimen Volume: 5 to10 mm
Collection Instructions: Place specimen in sterile container with 1 to 2 drops of sterile saline to keep tissue moist.
Specimen Stability Information: Refrigerate 5 days
Forms
If not ordering electronically, complete, print, and send a Gastroenterology and Hepatology Test Request (T728) with the specimen.
Specimen Minimum Volume
Defines the amount of sample necessary to provide a clinically relevant result as determined by the testing laboratory. The minimum volume is sufficient for one attempt at testing.
Respiratory specimens, spinal fluid, abscess, or drainage material: 0.5 mL
Tissue: 3 mm
Other specimen types: See Specimen Required
Reject Due To
Identifies specimen types and conditions that may cause the specimen to be rejected
| Preservative other than Ecofix or 10% formalin and zinc polyvinyl alcohol (Zn-PVA) | Reject |
Specimen Stability Information
Provides a description of the temperatures required to transport a specimen to the performing laboratory, alternate acceptable temperatures are also included
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Varies | Refrigerated | 5 days |
Useful For
Suggests clinical disorders or settings where the test may be helpful
Detecting and identifying parasitic protozoa and eggs and larvae of parasitic helminths
Testing Algorithm
Delineates situations when tests are added to the initial order. This includes reflex and additional tests.
Reflex testing will be added and performed at an additional charge by the laboratory based on the following criteria:
-Specimen source
-Specimen type: Unpreserved, refrigerate versus preserved
-Indication of parasites suspected
Clinical Information
Discusses physiology, pathophysiology, and general clinical aspects, as they relate to a laboratory test
A variety of different parasites may be found in specimens other than stool (eg, colonic washings, duodenal aspirates, other anatomical site washings or aspirates, respiratory specimens, liver cyst aspirates or abscesses, and tissues). These parasites may include protozoa (microscopic unicellular eukaryotes) and helminths (worms). Infection is often asymptomatic but possible signs and symptoms of infection may include cough, fever, bloody sputum, skin lesions, and abdominal pain.
Reference Values
Describes reference intervals and additional information for interpretation of test results. May include intervals based on age and sex when appropriate. Intervals are Mayo-derived, unless otherwise designated. If an interpretive report is provided, the reference value field will state this.
Negative
If positive, organism identified
Interpretation
Provides information to assist in interpretation of the test results
A positive result indicates the presence of the parasite but does not necessarily indicate that it is the cause of the patient's symptoms. Some strains of protozoa are nonpathogenic, and some helminths cause little or no illness.
Cautions
Discusses conditions that may cause diagnostic confusion, including improper specimen collection and handling, inappropriate test selection, and interfering substances
This test is not appropriate for the detection of microfilariae, malaria, trypanosomes, or Trichomonas vaginalis.
Clinical Reference
Recommendations for in-depth reading of a clinical nature
1. Garcia LS. Diagnostic Medical Parasitology. 6th ed. ASM Press; 2016
2. Pritt BS. Parasitology Benchtop Reference Guide. 2nd ed. CAP; 2017
Method Description
Describes how the test is performed and provides a method-specific reference
Different specimen sources may potentially harbor different types of parasites. A portion of the submitted specimen, depending on the type of specimen and what organism may be specifically suspected, may be examined by direct wet prep slide, tease or touch prep slides, concentrated for wet prep exam, or stained by trichrome stain, Ecostain, or Giemsa stain.(Unpublished Mayo method)
PDF Report
Indicates whether the report includes an additional document with charts, images or other enriched information
Day(s) Performed
Outlines the days the test is performed. This field reflects the day that the sample must be in the testing laboratory to begin the testing process and includes any specimen preparation and processing time before the test is performed. Some tests are listed as continuously performed, which means that assays are performed multiple times during the day.
Monday through Friday
Report Available
The interval of time (receipt of sample at Mayo Clinic Laboratories to results available) taking into account standard setup days and weekends. The first day is the time that it typically takes for a result to be available. The last day is the time it might take, accounting for any necessary repeated testing.
Specimen Retention Time
Outlines the length of time after testing that a specimen is kept in the laboratory before it is discarded
Performing Laboratory Location
Indicates the location of the laboratory that performs the test
Fees :
Several factors determine the fee charged to perform a test. Contact your U.S. or International Regional Manager for information about establishing a fee schedule or to learn more about resources to optimize test selection.
- Authorized users can sign in to Test Prices for detailed fee information.
- Clients without access to Test Prices can contact Customer Service 24 hours a day, seven days a week.
- Prospective clients should contact their account representative. For assistance, contact Customer Service.
Test Classification
Provides information regarding the medical device classification for laboratory test kits and reagents. Tests may be classified as cleared or approved by the US Food and Drug Administration (FDA) and used per manufacturer instructions, or as products that do not undergo full FDA review and approval, and are then labeled as an Analyte Specific Reagent (ASR) product.
This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. It has not been cleared or approved by the US Food and Drug Administration.
CPT Code Information
Provides guidance in determining the appropriate Current Procedural Terminology (CPT) code(s) information for each test or profile. The listed CPT codes reflect Mayo Clinic Laboratories interpretation of CPT coding requirements. It is the responsibility of each laboratory to determine correct CPT codes to use for billing.
CPT codes are provided by the performing laboratory.
CPT codes are provided by the performing laboratory.
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® Information
Provides guidance in determining the Logical Observation Identifiers Names and Codes (LOINC) values for the order and results codes of this test. LOINC values are provided by the performing laboratory.
| Test Id | Test Order Name | Order LOINC Value |
|---|---|---|
| OAPNS | Ova and Parasite, Microscopy, Varies | 673-4 |
| Result Id | Test Result Name |
Result LOINC Value
Applies only to results expressed in units of measure originally reported by the performing laboratory. These values do not apply to results that are converted to other units of measure.
|
|---|---|---|
| OAPNS | Ova and Parasite, Microscopy, Varies | 673-4 |