Ova and Parasite Test Test
An ova and parasite test looks for intestinal parasites and their eggs in a sample of your stool. It helps find out if parasites are causing your digestive symptoms.
What this test measures
An ova and parasite test looks for intestinal parasites and their eggs (ova) by checking a sample of your stool under a microscope.
What your results mean
Reference ranges vary by laboratory and by your age and sex. MedlinePlus does not publish a single normal range for this test — always read your result against the range printed on your own lab report and discuss it with your provider.
Frequently asked questions
What does an ova and parasite test look for?
It looks for intestinal parasites and their eggs in a stool sample.
How do you get intestinal parasites?
You can get them by swallowing contaminated water or food, or by putting something in your mouth that touched contaminated surfaces.
What are common types of intestinal parasites in the U.S.?
Common types include Giardia, Cryptosporidium, and Entamoeba histolytica.
What does a negative test result mean?
A negative result means no parasites or eggs were found, but you may still have an infection if there weren't enough in the sample.
What does a positive test result mean?
A positive result means you have intestinal parasites. Treatment depends on the type of parasite and your health.
Related lab tests
Sources
- MedlinePlus: Ova and Parasite Test — NIH MedlinePlus
Last updated . Information is aggregated from official public sources and is not a substitute for professional medical care.