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
Shigellosis is best diagnosed by ? 
Select and explain. 
A. Stool examination, B. Stool culture, C. Sigmoidoscopy, D. Enzyme
B: Stool culture
Answer: B: Stool culture 
Explanation: Ans. is `b' i.e., Stool culture Lab diagnosis "Diagnosis is made by isolating the bacillus from feces." . Transpo media - Sach's buffered glycerol saline . Culture - Specimens are inoculated on : 1) MacConkey medium 2)Deoxycholate medium (DCA) --> Selective medium 3)Hektoen entric agar or salmonella-shigella agar --> Selective medium