The procedure for conducting stool antigen tests involves the following steps: 1. Collection of a Stool Sample: The patient is provided with a sterile container to collect a stool sample. 2. Sample Preparation: The sample is then prepared according to the test's specifications, which may include homogenizing the stool. 3. Application of the Sample: A small amount of the prepared stool sample is applied to a test device or mixed with a reagent. 4. Analysis: The test is then analyzed to detect the presence of specific antigens. Results can be read visually or using specialized equipment.