However, all patients should have serologic testing, including all of the following: Fluorescent treponemal antibody absorption test or the microhemagglutination assay for Treponema pallidum are the usual syphilis screening tests Lyme titer Epstein-Barr virus panel New tests such as Treponema pallidum particle agglutination assay, Treponema pallidum enzyme immunoassay, chemiluminescence immunoassay, and nucleic acid amplification tests (NAAT) may also be useful in diagnosing ocular syphilis.