Stool ova and parasites exam

Definition

Stool ova and parasites exam is an analysisof stool to checkfor the presence of a parasite or worm-like infection of the intestine. Ova refers to the egg stage of a parasite's life cycle. Some parasites are single-cell organisms such as amoeba, giardia, and trichomonas, while others have a worm-like appearance.

Alternative Names

Parasites and stool ova exam

Why the test is performed

The test is performed if a parasitic infestation is suspected, for prolonged diarrhea of unknown cause, or other intestinal symptoms.

How the test is performed

For adults and children:

There are many ways to collect the samples. You can catch the stool on plastic wrap that is loosely placed over the toilet bowl and held in place by the toilet seat. Then, put the sample in a clean container. One test kit supplies a special toilet tissue that you use to collect the sample, then put the sample in a clean container.

For infants and young children in diapers:

Line the diaper with plastic wrap. If the plastic wrap is positioned properly, isolating the stool from any urine output, mixing of urine and stool can be prevented for a better sample.

A small smear of stool is placed on a microscope slide and examined.

How to prepare for the test

You will be given a specimen container for the stool sample. Do not mix urine or toilet tissue in with the stool specimen.

How the test will feel

There is no discomfort.

What the risks are

There are no risks.

Special considerations

Not applicable.

Normal Values

The presence of normal bacteria and other microorganism in the stool is normal.

What abnormal results mean

Parasites or eggs are present in the stool indicating parasitic infestation.

See also:

  • Giardiasis
  • Taeniasis
  • Strongyloidiasis
  • Amebiasis
Lower digestive anatomy
Lower digestive anatomy
Review Date: 2/10/2006
Reviewed By: Kenneth Wener, M.D., Division of Infectious Diseases, Beth Israel Deaconess Medical Center, Boston, MA. Review provided by VeriMed Healthcare Network.
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