Heparan sulfate (HS) serves as a receptor for adherence of herpes simp
lex viruses, Chlamydia trachomatis, Neisseria gonorrhoeae, and, indire
ctly, human immunodeficiency virus. Using primary human culture system
s, we identified sulfated carbohydrate compounds that resemble HS and
competitively inhibit infection by these pathogens. These compounds ar
e candidates for intravaginal formulations for the prevention of sexua
lly transmitted diseases.