Hello , I understand your concern. I am Dr. Arun Tank, infectious disease specialist, answering your concern. I think you are speaking of the C. difficile infection. This type of infection never occurs to general population. It can occur to those people having prolong antibiotic therapy, prolonged hospitalization and immunosuppresion. Yes it can be contagious but only to the above mentioned category. But you should diagnose your daughter first to give them treatment. I advcie you to test for toxins produced by the C.difficile. It is treatable and has no reason to worry. Once it is diagnosed you can take clindamycin under your doctors guidance. It will clear up the infection in your daughter. Please adopt good hand washing practice for whole family members. It will create a barrier for all the peoples. I will be happy to answer your further concern you can contact me here or you can contact me on bit.ly/DrArun We wish you a best health at healthcare magic. You can hit thank you button if you are helped. Thank you, Dr. Arun Tank