During patient and family teaching, the nurse explains that the most common cause of hemolytic uremic syndrome (HUS) in children is exposure to _____ and that long-term follow-up is important because children may later develop _____.

Rationale for Correct Choices: E. coli: The most common cause of hemolytic uremic syndrome (HUS) in children is infection with Escherichia coli, particularly the Shiga toxin–producing strain O157:H7. This toxin damages endothelial cells, leading to hemolysis, thrombocytopenia, and acute kidney injury. Chronic kidney disease: Although many children recover after an acute episode of HUS, long-term follow-up is critical because some develop chronic kidney disease. Persistent renal damage may lead to proteinuria, hypertension, or end-stage kidney disease years later. Rationale for Incorrect Choices: Vesicoureteral reflux (VUR): VUR is a urinary tract condition where urine flows backward into the ureters. It is not infectious and does not cause HUS. Staphylococcus aureus: This bacterium is associated with skin infections, toxic shock syndrome, and sepsis, but it does not commonly trigger HUS in children. Enuresis: Bedwetting is a urinary symptom, not a complication of HUS. It does not reflect the long-term renal outcomes of the disease. Influenza: A viral respiratory infection, influenza is not linked to the development of HUS. Appendicitis: This is an acute surgical condition and unrelated to the hemolysis and renal failure seen in HUS. Varicella: Chickenpox is caused by the varicella-zoster virus. It is not a typical cause of HUS in pediatric patients