Demonstration of Treponema pallidum Using Dark-Field Microscopy
Treponema pallidum is a thin, delicate, tightly wound spirochaete that cannot be seen in Gram-stained smears. So, dark-field microscopy is used to demonstrate the presence of motile Treponema...
Treponema pallidum Hemagglutination Assay (TPHA) is a treponemal test for the serologic diagnosis of syphilis, a sexually transmitted infection caused by spirochetes, Treponema pallidum. Based on the...
The rapid plasma reagin (RPR) test is a macroscopic, nontreponemal flocculation card test used to screen for syphilis. Let’s first analyze the test name: Rapid: It is a rapid...
Syphilis is a sexually transmitted disease caused by the bacterium Treponema pallidum. Syphilis has diverse clinical manifestations and shares many clinical features with other treponemal and...
Fluorescent treponemal antibody-absorption (FTA-ABS) test is an indirect fluorescent antibody technique used as a confirmatory test for syphilis. FTA-ABS is the first serological test to become...
The venereal disease research laboratory (VDRL) test is a nonspecific microflocculation test for the screening of syphilis. It uses antigen-containing cardiolipin, lecithin, and cholesterol and...
