Diarrhea Management in Children

Etiology and Clinical Characteristics

The American Academy of Pediatrics and the Centers for Disease Control and Prevention suggest that rotavirus is the leading cause of acute diarrhea in children under 5 years of age, accounting for approximately 25% of all cases and up to 40% of hospitalizations for diarrhea in this age group 1
Bacterial causes are unlikely given the clinical presentation, but should be considered if bloody or mucoid stools develop, suggesting Salmonella, Shigella, Campylobacter, or STEC 2, 3

The Centers for Disease Control and Prevention recommends assessing dehydration status immediately using clinical signs, including mild dehydration (3-5% deficit), moderate dehydration (6-9% deficit), and severe dehydration (≥10% deficit) 6
The World Health Organization and the Centers for Disease Control and Prevention suggest initiating oral rehydration solution (ORS) immediately without waiting for diagnostic testing, with 50 mL/kg ORS over 2-4 hours for mild-moderate dehydration 6, 4, 7
The American Academy of Pediatrics recommends continuing age-appropriate feeding during and immediately after rehydration, including maintaining breastfeeding throughout the illness 7

The Centers for Disease Control and Prevention and the American Academy of Pediatrics advise against using antimotility agents (loperamide) in children, as they can cause serious complications including ileus and death 8, 5, 7
The World Health Organization and the American Academy of Pediatrics recommend against using antibiotics for viral gastroenteritis, as they provide no benefit and may cause harm 5, 7

The American Academy of Pediatrics suggests admitting to hospital if severe dehydration requires IV fluids, inability to tolerate oral fluids despite ORS attempts, altered mental status or signs of shock, or persistent high fever with signs of sepsis 4, 7