If a child shows symptoms of a fecal-oral transmitted disease, parents should: - Seek medical advice: Consult a pediatrician for diagnosis and treatment. - Maintain hydration: Ensure the child stays hydrated, especially if they have diarrhea or vomiting. - Isolate: Keep the child away from other children to prevent the spread of infection. - Follow treatment plans: Adhere to prescribed medications and follow-up appointments.