Hemolytic Uremic Syndrome (HUS)
Serious condition combining red-cell destruction, low platelets, and acute kidney injury.
Primary risk age: Most common in children under 5 years.
- Urgency
- Emergency
- Typical age
- Most common in children under 5 years.
- Body system
- Renal & Urological
Typical course: The acute illness lasts 1–3 weeks; kidney recovery is monitored over months.
Reviewed against AAP · CDC · WHO · NHS guidance Last reviewed 2026-06-13
1. Summary & Pathophysiology
Serious condition combining red-cell destruction, low platelets, and acute kidney injury.
Pathophysiology (Development Path)
A toxin damages the lining of small blood vessels, especially in the kidneys, where clots form, red cells are destroyed as they pass through, platelets are consumed, and kidney filtering fails.
Primary Causes & Etiology
Usually follows infection with Shiga-toxin-producing E. coli (often from undercooked meat or contaminated food or water) causing bloody diarrhea; less common forms have other triggers.
2. Symptom Continuum
- Early Onset Signs
Several days of diarrhea, often bloody, with abdominal pain and vomiting.
- Progressive Phase
As diarrhea settles: paleness, tiredness, reduced urine output, irritability, and easy bruising.
- Severe Indicators
Very little or no urine, swelling, seizures, severe lethargy, or breathing difficulty are emergencies requiring immediate hospital care.
3. Clinical Verification
Blood tests showing anemia, low platelets, and impaired kidney function, with stool testing for the responsible bacteria.
4. Care & Elements Plan
Primary Care Treatment Plan
Hospital supportive care is the mainstay — careful fluid and electrolyte management, treatment of anemia, and dialysis for severe kidney failure. Antibiotics and anti-diarrheal medicines are generally avoided in toxin-related HUS.
Home Support Elements
There is no home treatment; the priority is recognizing warning signs early. After recovery, attend kidney follow-up because some children have lasting effects.
Generic Active Ingredients (No Brands)
- Intravenous fluids and electrolyte management (hospital supportive care)
- dialysis (kidney support for severe injury)
- red-cell transfusion (for significant anemia). Antibiotics are generally avoided in typical HUS.
Lists active elements only. Never administer self-designed therapies.
5. Doctor Critical Lines
Critical Thresholds: When to See a Doctor
Seek urgent care for bloody diarrhea, and emergency care for reduced or absent urination, marked paleness, swelling, drowsiness, or seizures after a diarrheal illness.
6. Vaccine & Prevention
Routine Prophylaxis (Prevention)
Thoroughly cooking meat, washing hands and produce, avoiding unpasteurized milk and juice, and safe water prevent the E. coli infections that trigger most cases.
Immunization Context
No vaccine prevents typical HUS; preventing the underlying infection is key.
7. Timelines & Outlook
Active Timeline
The acute illness lasts 1–3 weeks; kidney recovery is monitored over months.
Expected Prognosis
Most children recover kidney function with timely care, but a minority have lasting kidney damage and need long-term follow-up.
Potential Untreated Complications
Long-term kidney damage or high blood pressure, and acute effects on the brain, heart, and pancreas.
More in Glomerular Boundary Filtration Pathology
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