| FPSTS | false-positive serologic test for syphilis |
|---|---|
| HATTS | hemagglutination treponemal test for syphilis |
| LI, LII, | LIII first, second, third stage of syphilis |
| LT | heat-labile toxin; laminar tomography; left; left thigh; less than; lethal time; leukotriene; Levin ... |
| S | Greek capital letter sigma; syphilis; summation of series |