What is the type of Ag-Ab reaction seen in VDRL: (A) Agglutination, (B) Flocculation, (C) Passive agglutination, (D) Gel precipitation
Answer is B. Instead of sedimenting,the precipitate remains suspended as floccules which is called flocculation,which is a type of precipitation reactions,one amongst whose applications is the VDRL test for syphilis. Ref: anantnarayan and panikers 10 th edition