Ova and Parasite Test
Reviewed
An ova and parasite test (O&P) looks for intestinal parasites and their eggs (ova) in a stool sample using a microscope. It helps diagnose infections causing diarrhea, stomach cramps, and other digestive symptoms. The test is used when symptoms last a few days and there is a possible exposure to parasites. Treatment is available for most infections, and recovery is common.
Preparation and collection
You don't need any special preparations for an ova and parasite test.
Understanding this test
Use the reference interval and units printed by the laboratory that performed the test. A result outside that interval is not a diagnosis by itself, and a result inside it does not rule out every condition. Your symptoms, history, medicines, timing, and related tests can change what the result means.
- A negative result does not completely rule out infection because parasites may not be present in every stool sample.
- The test relies on sample quality and proper collection; multiple samples over several days may be needed for accurate results.
What to do next
Share results with your healthcare provider, who will interpret them based on your symptoms and history. If positive, treatment may include medications and hydration. If negative but symptoms persist, your provider may order additional tests.