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Fecal smear

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Lower digestive anatomy

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Fecal smear

Definition:

Fecal smear is a laboratory test to screen the feces for organisms that can cause gastrointestinal symptoms and diseases.

Alternative Names:
Stool smear

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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 amount of a feces sample is applied to a microscope slide and examined for the presence of abnormal organisms. A stain may be applied that highlights certain organisms under the microscope.

How to prepare for the test:

A collection container will be provided for the stool specimen. Return the sample to the laboratory as soon as possible. The sample should not include toilet tissue or urine.

How the test will feel:

There is no discomfort.

Why the test is performed:

The test is performed as a screening tool to detect the presence of abnormal organisms in the gastrointestinal tract. It may be performed if severe, persistent, or recurrent diarrhea of an unknown cause is present. The results can be used to determine antibiotic therapy.

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