Ova and Parasite, Travel History or Immunocompromised, Feces
Use
This test is useful for detecting and identifying parasitic protozoa and eggs, as well as larvae of parasitic helminths in stool specimens. These parasites may cause conditions ranging from asymptomatic infections to diarrhea, malnutrition, intestinal obstruction, and rarely, death. The test is particularly important for diagnosing infections in individuals who have traveled to endemic areas or are immunocompromised. It includes detection of less common parasites not typically seen in the United States.
Special Instructions
For optimal detection, it is recommended that multiple stool specimens be submitted for analysis. Patients should collect stool samples at least 12 hours apart. Additionally, stool collection should be avoided within 7 to 10 days after administration of substances such as barium or within 2 to 3 weeks of antibiotic use. Each specimen must be placed in a preservative within 30 minutes of collection. If unpreserved, the specimen is not acceptable. Forms such as the Microbiology Test Request or Gastroenterology and Hepatology Test Request need to accompany physical submissions if not ordered electronically.
Limitations
This test is not optimal for detecting specific organisms such as Giardia, Cryptosporidium, microsporidia, Cyclospora, or pinworm, which require targeted tests for accurate identification. Single specimen analysis may not guarantee detection due to irregular shedding of parasites, thus multiple samples are recommended. The test is less useful for patients hospitalized for more than 3 days since parasitic infections are rarely acquired in hospital settings. Certain specimen types or conditions, such as those preserved in inappropriate substances, can lead to rejection.
FDA ApprovedNew York Approved
Methodology
Microscopy
Biomarkers
LOINC Codes
- 10704-5
Result Turnaround Time
4-6 days
Related Documents
For more information, please review the documents below
Specimen
Stool
Volume
2 g or 2 mL
Minimum Volume
5 mL
Container
ECOFIX Stool Transport Vial, 10% Buffered formalin AND Zn PVA
Collection Instructions
Place specimen in ECOFIX preservative vial or one 10% formalin AND one Zn PVA preservative vial within 30 minutes of passage or collection. Mix contents well with the provided spoon and shake the tube vigorously.
Patient Preparation
Delay collection for 7-10 days after use of barium, bismuth, or related substances; 2-3 weeks post-antibiotics.
Causes for Rejection
Specimens preserved in low viscosity PVA, mercury PVA, or Cu-PVA will be rejected.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 21 days |
| Refrigerated | 21 days |