Which test for syphilis utilizes plastic-coated cards?

The test for syphilis that utilizes plastic-coated cards is indeed the Rapid Plasma Reagin (RPR) test. This serological test is commonly used for the screening of syphilis and employs a carbon particle agglutination technique. The plastic-coated cards allow for the mixing of patient serum and test reagents on a surface that facilitates the observation of agglutination.

In the RPR test, the patient's serum is added to a card along with specific reagents, including cardiolipin, and results in visible clumping if antibodies to the syphilis pathogen are present. The plastic cards are designed to be user-friendly and enhance the visibility of the reaction, thus making it an efficient method for clinicians.

Other tests, such as the VDRL (Venereal Disease Research Laboratory) test, FTA-ABS (Fluorescent Treponemal Antibody Absorption), and TPPA (Treponema pallidum Particle Agglutination), do not utilize this plastic card format in their standard testing procedures. For example, the VDRL test can be performed on slides, while FTA-ABS and TPPA typically involve more complex laboratory procedures that do not include the use of plastic-coated cards. This