Can antibiotics (medications that kill bacteria) help improve responses to Pediatric Crohn's disease treatment?

This research study is to find out if antibiotics (medications that kill bacteria) can help improve responses to Crohn's disease treatment in children with certain bacterial profiles. Participants in this study will be assigned to 1 of 3 study groups using a two-step process. The first step involves looking at a sample of your child's stool that was collected before they started treatment. Your child will be assigned to a group based on their bacterial profile. If they have a type A bacterial profile, they will be in Group A. If they have a type B bacterial profile, they will be in Group B. People in Group A will be randomly assigned to 1 of 2 new groups: Group A1 or Group A2. The chance of people in Group A being assigned to Group A1 or A2 is 50/50, like flipping a coin.