There are several age-specific clinical presentations for pediatric UTI. Neonates present with a clinical syndrome indistinguishable from sepsis, and may often have nonspecific symptoms such as fever, jaundice, poor feeding, vomiting, irritability, or lethargy. Older infants and young children typically present with gastrointestinal symptoms such as abdominal pain, vomiting, or decreased appetite. School-age children and adolescents present similarly to adults, and often, but not always, complain of specific urinary symptoms such as dysuria, frequency, urgency, or hesitancy. Infants and young children are more likely to have fever and upper tract disease, necessitating longer courses of antibiotic treatment. Adolescents without fever, flank pain, or vomiting may be treated similarly to adults with shorter course antibiotic regimens.