This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteriology, Subject name: Microbiology
[{'content': 'A patient comes to the clinic requesting a tuberculin skin test as a pa of his preemployment check up. All of the following are methods of tuberculin testing except \nSelect and explain. \nA. Tine test, B. Heaf test, C. Pirquet test, D. Quantiferon gold', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Quantiferon gold is not a type of tuberculin skin test. It is a type of interferon-gamma release assays (IGRAs), a whole-blood tests that can aid in diagnosing Mycobacterium tuberculosis infection. Two IGRAs that have been approved by the US (FDA) are QuantiFERON-TB Gold In-Tube test (QFT-GIT); T-SPOT.TB test (T-Spot) There are 3 described methods for tuberculin skin testing (TST): Mantoux test, also known as the Pirquet test (preferred method) Heaf test Tine test Reference: Ananthanarayan and Paniker&;s Textbook of Microbiology Tenth edition', 'role': 'assistant'}]