Ova and Parasites Examination
Also known as: Parasitology Examination
Use
Establish the diagnosis of parasitic infestation
Special Instructions
Include pertinent clinical and travel history on the test request form, indicating a special request for Cyclospora Smear, Stool at an additional charge if needed. If Schistosoma haematobium infection is suspected, a urine specimen should be submitted for Ova and Parasites Examination, Urine. Multiple specimens may be necessary for accurate diagnosis, and fresh feces should not be submitted. Ensure the specimen is maintained at room temperature and collected before initiation of any related therapies.
Limitations
A negative result does not conclusively rule out the presence of parasitic infestation. Stool examination for Giardia may be negative during early stages, cyclical shedding, or chronic infections. The sensitivity of microscopic methods can vary significantly, necessitating additional testing for certain pathogens. Optimal diagnostic outcomes are achieved through the examination of fresh, warm stool by an experienced technologist.
Methodology
Other
Biomarkers
LOINC Codes
- 673-4
- 673-4
Result Turnaround Time
3-7 days
Related Documents
For more information, please review the documents below
Specimen
Stool
Volume
5 mL
Minimum Volume
3 mL
Container
O & P transport container with formalin and PVA (Para-Pak® pink and gray)
Collection Instructions
Submit in a parasite preservative kit, inoculating both PVA and formalin tubes. Do not submit fresh feces. State the preliminary diagnosis.
Patient Preparation
Usual aseptic technique
Storage Instructions
Maintain specimen at room temperature.
Causes for Rejection
Specimen on diaper or tissue paper, leaking specimens, or those containing interfering substances like castor oil or barium will be rejected. Unlabeled specimens or discrepancies between specimen and test request label; expired transport device and specimens not in O&P preservative containers will also lead to rejection.