text: The Syphilis TPHA test is a classic, indirect hemagglutination test used for the detection and titration of antibodies against the causative agent of syphilis,Treponema<unk> .
  In the test red blood cells (erythrocytes) are sensitized with antigens from T.<unk> . The erythrocytes will then aggregate together to form distinctive patterns on the surface of a microplate wells when exposed to syphilitic serum.
  False Positives are common in this test. This is typically caused by antibodies directed against other non-pathogenic or non target treponemas, such as T.<unk>  subsp endemicum,  T.<unk>  subsp pertenue, and T. carateum. These antibodies can be adsorbed out of the test sample by a variety of methods thereby reducing false positives for syphilis.
option_0: Treponema pallidum hemagglutination assay 
option_1: Heterophile antibody test
option_2: Nucleic acid test
option_3: Fluorescent treponemal antibody absorbtion 
option_4: Mantoux test
option_5: Hemagglutination assay
option_6: Coronavirus x ray
option_7: Viral load