Hello! Thank you for the query. Your daughter symptoms can be caused by bacterial infection indeed. However food allergies and coeliac disease should be also considered. You need to know that after every antibiotic treatment, all intestines bacteria are destroyed. And in the intestines, we have good bacteria which are extremely important for proper bowels function. That is why, with an antibiotic, she should have probiotic as well. I suggest you to have stool tests repeated, stool culture test (to determine which bacteria is causing the symptoms), allergy tests, IgA levels checked. Hope this will help. Regards.