VDRL is a -: (A) Slide flocculation test, (B) Tube floccolation test, (C) Gel precipitation test, (D) Indirect haemagglutination test
Answer is A. The VDRL test for syphilis is an example of a slide flocculation test. When a drop each of the antigen and the antiserum are placed on a slide and mixed by shaking, floccules appear. Reference: Anathanarayan & paniker's 9th edition, pg no: 106 <\p>