Which of the following is a flocculation test ?: (A) Widal test, (B) Weil- felix test, (C) VDRL, (D) Paul- Bunnel test
Answer is C. Ans. is 'c' i.e., VDRL When instead of sedimenting, the precipitate remains suspended asfloccules, the reaction is known as flocculation ( instead of precipitation) Examples -) VDRL slide flocculation test and Kahn tube flocculation test for syphilis.