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
An organism is found to be a pleomorphic, gram-negative rod that causes a localized skin infection and seems to be a cause of an occupational disease of fishermen, fish handlers, and butchers. Most likely organism is: 
Select and explain. 
A. Erysipelothrix, B. Brucella, C. Salmonella, D. Leptospira
A: Erysipelothrix
Answer: A: Erysipelothrix 
Explanation: Erysipelothrix