This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacterial infection, Subject name: Medicine
Pontiac fever is caused by: 
Select and explain. 
A. Marbug virus, B. Legionella, C. Tuberculosis bacilli, D. Sindbis virus
B: Legionella
Answer: B: Legionella 
Explanation: - Legionellosis- Pontiac fever & Legionnaires' disease Pontiac fever is an acute, febrile, self-limited illness that has been serologically linked to Legionella species Legionnaires' disease is pneumonia caused by these species.