The<unk>  is an agglutination test for the diagnosis of rickettsial infections. It was first described in 1916. By virtue of its long history and of its simplicity, it has been one of the most widely employed tests for rickettsia on a global scale, despite being superseded in many settings by more sensitive and specific diagnostic tests. The<unk><unk>  antibody was recently found to target rickettsia LPS O-antigen.
Weil–Felix test
Hawkins–Kennedy test
Rinne test
Patrick's test
Elek's test
Bourne test
Buehler test
Draize test