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: (A) Tine test, (B) Heaf test, (C) Pirquet test, (D) Quantiferon gold
Answer is D. 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