What is the serum:antigen ratio in any VDRL test?

In the VDRL (Venereal Disease Research Laboratory) test, the serum:antigen ratio is standardized at 1:1. This means that equal parts of serum and the VDRL antigen are mixed for testing. The aim of this ratio ensures the optimal conditions for the detection of antibodies that may indicate syphilis.

The choice indicating a ratio of 3:1 is not accurate within the context of the VDRL test. Thus, while a 1:1 ratio is essential for accurate testing, suggesting a higher ratio would not appropriately reflect the testing method used, leading to potential inaccuracies in results. Maintaining the correct serum:antigen ratio is critical for reliable diagnostic outcomes in syphilis screening and other related purposes.