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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Most common cause of hemolytic uremic syndrome is –
assistant
The correct answer is  Etiology of HUS

HUS usually follows an episode of acute gastroenteritis.
Less commonly, patient may present after an upper respiratory tract infection.
The organisms responsible are -
E.coli (most common) → EHEC (shiga toxin producing)           
Shigella dysenteriae     
Salmonella     
Bartonella   
Streptococcus pneumonia      
Campylobacter