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The second breath sample will contain more carbon dioxide than the first. Antigens are a type of protein. The test checks your sample for antigens that come from H. PCR tests check your sample for genetic material from H. In general, you'll need to: Label the container with your name, the collection date, and time. Collect a stool sample as instructed.

This usually involves using a clean, dry container, or special paper or plastic wrap placed over the toilet to catch the stool. Make sure the stool doesn't mix with any urine, toilet paper, or water from the toilet.

Close the container tightly. Wash your hands well with soap and water.