Your healthcare provider will take a complete health history. Be sure to mention any recent trips and what you ate before you became ill. Keep in mind that symptoms may not appear for a day or 2 after you become infected. You may be asked to provide a sample of your stool. This is sent to a lab for testing. Don’t forget to check with your provider or hospital emergency department to learn the test results. In some cases, you will be asked to see your provider for follow-up care.