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
Lues maligna is caused by? 
Select and explain. 
A. Borrelia, B. Leptospira, C. Brachyspira, D. Treponema
D: Treponema
Answer: D: Treponema 
Explanation: Ans. is 'd' i.e.,TreponemaLues maligna represents a rare form secondary syphilis ( caused by treponema pallidum).also known as 'malignant syphilis' or 'ulceronodular syphilis'.