STD Research Laboratory Test

The STD research laboratory test uses cardiolipin, lecithin and cholesterol as antigens, which can be used for quantitative and qualitative tests. The reagents and control serum have been standardized and the cost is low. This method is commonly used, the operation is simple, and the results need to be read with a microscope. The disadvantage is that the sensitivity of primary syphilis is not high. Cardiolipin is used as an antigen to measure anticardiolipin antibodies in serum, also known as reactin. This test has high sensitivity and low specificity, and is prone to biological false positives. After adequate treatment of patients with early syphilis, reptin can disappear, and those who have not been treated early to late can also reduce or disappear in some patients. Currently it is generally used as a screening and quantitative test to observe efficacy, recurrence and reinfection. Treponema pallidum cannot be cultured in vitro and cannot be stained by conventional methods. Tests commonly used in the laboratory include searching for Treponema pallidum at a typical ulcer and detecting the presence of antibodies in the serum. Different laboratory methods should be used for different stages of infection. Ulcers do not appear at any stage of the disease, and antibodies usually appear 1 to 4 weeks after the ulcers develop.