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: Pediatrics
[{'content': 'Which of the following is best used in the diagnosis of congenital syphilis: March 2011 \nSelect and explain. \nA. Dark ground microscopy, B. VDRL, C. IgM FTA-ABs, D. TPI', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. C: IgM FTA-ABs A positive VDRL test has to be confirmed by fluorescent treponemal antibody absorption test (FTA-ABS) and treponema pallidum micro hemagglutination (MHA-TP) test which are specific Late Congenital syphilis: Hutchinsons triad: - Hutchinson teeth - 8th cranial nerve deafness - Interstitial keratitis Periosteitis (Higaumenakis sign) IgM FTA-Abs is best to diagnose syphilis', 'role': 'assistant'}]