This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
[{'content': "A person returns to Delhi from Bangladesh after 2 days and has diarrhoes. Stool examination shows RBC's in stool. The likely organism causing is ? \nSelect and explain. \nA. Enteropathogenic E. Coli, B. Enterotoxigenic E. Coli, C. Salmonella typhi, D. Shigella dysenteriae", 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Shigella dysenteriae . This is a case of traveller's diarrhea. . RBCs in stool are suggestive of dysentry. Lets see each option sequentially: . Enteropathogenic E. coli is not a cause of traveller's diarrhea . Enterotoxigenic E. coli is the most common cause of traveller's diarrhea but it causes watery diarrhea, not dysentry. . Salmonella other than S. typhi causes gastroenteritis. . Shigella is a cause of traveller's diarrhea and it causes dysentry.", 'role': 'assistant'}]