(left) Evolution of the contact radius, R (mm) (squares), contact angle, Î¸ (Â°) (circles), and height of the droplet, h0 (mm) (up-triangles), with time, t (s); (a) under electrowetting conditions and (b) under free evaporation of 0.1% TiO2âwater nanofluid.
To summarize, the only blood tests commonly done for STDs test for syphilis, HIV and hepatitis B. A blood test for herpes exists but is seldom done. A good urethral test for gonorrhea and chlamydia exists, but is seldom done in men unless specifically requested.
There is also a urine test for both chlamydia and gonorrhea which is slowly replacing the blood and swab tests. Syphilis: Also a bacterial disease, syphilis typically first causes a painless ulcer, usually on the genitals but occasionally around the mouth or elsewhere. A good screening blood test exists, and will almost certainly be ordered by almost all doctors if one asks to be tested for STDs.