DefinitionStool ova and parasites exam is a laboratory test to determine if a stool sample contains parasites or eggs (ova) that are associated with intestinal infections.Alternative NamesParasites and stool ova examHow the test is performedA stool sample is needed. There are many ways to collect the sample. 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. You then put the sample in a clean container.To collect a sample from a child in diapers, line the diaper with plastic wrap. If the plastic wrap is positioned properly, you can keep the stool separate from urine, thus ensuring a better sample.R