Ova and Parasite, Stool

The Ova and Parasite stool test may be ordered when an individual is experiencing symptoms of parasitic infection, such as:

• Prolonged abdominal cramping
• Prolonged diarrhea
• nausea and vomiting
• blood or mucus in the stool

It is important to note that one negative result does not rule out the possibility of parasitic infection. Repeat testing may be necessary for the most accurate results.

This test is commonly ordered with the Stool Culture test.  

O&P exams may detect trophozoites and/or cysts of important human parasitic pathogens including; Coccidia sp, Entamoeba histolytica, E histolytica/dispar, Giardia sp, Isospora sp, Microsporidia sp, Schistosoma mansoni, and Schistosoma haematobium, as well as non-pathogenic parasites that indicate exposure to unclean environmental sources. This test does not include testing for Cryptosporidium parvum, Cyclospora, or Microsporidia.

When ordering the Ova and Parasite stool test, it is required to go to the laboratory PSC to obtain the proper specimen container and instructions prior to collection.  You must take in your requisition form when you go to the laboratory PSC to pick up your specimen collection kit and when you are dropping your specimen off to the laboratory PSC.

For LabCorp: LabCorp specimen collection and instructions.

• Specimen collection kit pick up: An appointment to pick up the specimen collection kit is not required, but is encouraged. Remember to take in your requisition form to show the staff so they can provide you with the correct collection supplies. 
• Specimen drop off: An appointment is not required, but is encouraged. You must sign in at the laboratory PSC when dropping off your specimen. The Phlebotomist will verify your drop off by reviewing your requisition form and the specimen you are submitting.

For Quest Diagnostics:   Quest Diagnostics specimen collection and instructions.  

• Specimen collection kit pick up: An appointment to pick up the specimen collection is required. Remember to take in your requisition form to show the staff so they can provide you with the correct collection supplies.
• Specimen drop off: An appointment to drop off your specimen is required. The Phlebotomist will verify your drop off by reviewing your requisition form and the specimen you are submitting.

Reviewed By: Dr. Kurt Kloss, MD
Last Reviewed Date: Jul 25, 2022