<prompt> Heterophile antibody is found in -Weil Felix testWidal testVDRLAll  <response>: Weil- Felix reaction for the diagnosis of typhus fever is a hetrophile agglutination test. Based in the sharing of common antigen between typhus rickettsiae and some strains of proteus bacilli. Hetrophile antigen is the same or closely related antigens occurring in different species, classes or kingdoms. Reference : Anathanarayan panikers 9th edition, pg no: 109,89 p 