This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteria, Subject name: Microbiology
Preformed toxin produces diarrhea in which organism? 
Select and explain. 
A. Staphylococcus, B. Vibrio cholera, C. Salmonella, D. Escherichia coli
A: Staphylococcus
Answer: A: Staphylococcus 
Explanation: ANSWER: (A) StaphylococcusREF: Harrison's 17 edition, table 40.2See APPENDIX-22 for "ACUTE INFECTIOUS DIARRHEA"