Which of the following doesnt cause bloody diarrhea ?

Cholera
Salmonella
Shigella
Ecoli 

Answer is A 

Straight from AmalgmPG notes -  We have clearly mentioned that late complication of salmonella as GI bleeding, which can result in. blood mixed diarrhea. EHEC variant of E-coli and Shigella is known to cause Bloody diarrhea. (Source - Gram -ve Bacteriology notes of AmalgmPG)

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