A test for the diagnosis of typhus and certain other rickettsial diseases In this test, the blood serum of a patient with suspected rickettsial disease is tested against certain strains of Proteus vulgaris(OX-2, OX-19, OX-K) The agglutination reactions, based on antigens common to both organisms, determine the presence and type of rickettsial infection.. What is the test

Weil-Felix reaction