This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunology, Subject name: Microbiology
VDRL is a - 
Select and explain. 
A. Slide flocculation test, B. Tube floccolation test, C. Gel precipitation test, D. Indirect haemagglutination test
A: Slide flocculation test
Answer: A: Slide flocculation test 
Explanation: 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>