This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: AIIMS 2018, Subject name: Microbiology
Episodes of repeated thin stools with mucus, subjective feeling of fever and lower abdominal pain, with leukocytes in stool. Which of the following is likely? 
Select and explain. 
A. Giardia, B. Entamoeba, C. Staph, D. Clostridium perfringens
B: Entamoeba
Answer: B: Entamoeba 
Explanation: As leucocytes are present in stools so it is inflammatory type of diarrhea. So the likely organism is Entamoeba As Staph and C. perfringens are responsible for water diarrhea (non-inflammatory diarrhea) Giardia cause malabsorption syndrome.