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
Most sensitive test for Treponoma: 
Select and explain. 
A. VDRL, B. RPR, C. FTA-ABS, D. Kahn
C: FTA-ABS
Answer: C: FTA-ABS 
Explanation: Ans. (c) FTA-ABS ' Most sensitive test for syphilis: FTA-ABS Most specific test for syphilis: TPI Note Treponemal test are likely to remain reactive even after adequate treatment and cannot differentiate past from current trepon mal infection.