Fecal DNA Probe for Pathogen Detection (Multiplex Fluorescent In Situ Hybridization)

Why This Test Might Be Ordered

Your doctor may recommend this test if you have symptoms like diarrhea, abdominal pain, fever, or unexplained weight loss, especially if standard stool tests (like culture) didn’t confirm an infection. It’s also used in cases where you’ve been exposed to known pathogens or if you’re at higher risk for certain infections (e.g., travel to areas with specific diseases).

How the Test Works

The test uses a special probe to detect genetic material (DNA) from specific pathogens in your stool. Unlike traditional cultures, this method can identify many types of germs simultaneously, often providing results faster. The DNA is analyzed using advanced laboratory techniques to confirm the presence of harmful microbes that might not grow well in standard culture conditions.

Sample Collection and Preparation

You’ll need to provide a fresh stool sample (collected in a sterile container) for this test. If you’re using a kit, follow the instructions carefully to ensure the sample is handled properly. Some kits may require refrigeration or immediate delivery to the lab to maintain sample integrity.

What to Expect During the Test

After your sample is collected, it’s sent to a lab where technicians prepare it for analysis. The test typically involves mixing the stool with a special solution that contains fluorescent probes. These probes bind to the DNA of specific pathogens, and the sample is then examined under a microscope or through another high-tech method to detect the presence of these genetic markers. Results are usually available within a few days.