Stool Culture with Antimicrobial Susceptibility Testing

What Does This Test Measure?

The test looks for the presence of harmful microorganisms (such as bacteria or yeast) in your stool. It also evaluates how different antibiotics would affect these microbes, helping your healthcare provider choose the best treatment.

Why Might You Need This Test?

You may need this test if you have symptoms like diarrhea, abdominal pain, fever, or unexplained weight loss that could indicate an infection in your digestive system. It’s also used to confirm infections in people with weakened immune systems or those who have had recent surgeries.

How Is the Test Performed?

A small sample of your stool is collected in a sterile container. This sample is then sent to a lab where it is cultured to grow any bacteria or fungi present. If antibiotics are tested, the lab will also expose the sample to various antibiotic concentrations to see which ones work best against the identified microbes.

What Are Common Results?

Results can show the presence or absence of specific bacteria or fungi, along with the susceptibility (or resistance) to antibiotics. If bacteria are found, your doctor will use the results to prescribe the most effective treatment.