Sexually transmitted diseases

Bacterial?

Chancroid? - [Haemophilus ducreyi]?
Chlamydia - [Chlamydia trachomatis]?
Donovanosis? ([Granuloma inguinale]?) - [Calymmatobacterium granulomatis]?
Gonorrhoea? - [Neisseria gonorrhoeae]?
[Lymphogranuloma venereum]? (LGV?) -- [Chlamydia trachomatis]? serotypes L₁, L₂, L₃
[non-gonococcal urethritis]? (NGU?)

[Ureaplasma urealyticum]?
[Mycoplasma hominis]?

Syphilis - [Treponema pallidum]?

Viral?

Cytomegalovirus?
Hepatitis?

[Hepatitis B]?
[Hepatitis C]?
[Hepatitis D]?
([Hepatitis A]? and [Hepatitis E]? are transmitted via the [faecal-oral route]?)

Herpes? - [Herpes simplex virus]? (HSV?)
[Human Immunodeficiency Virus]? (HIV)
[Molluscum contagiosum]?
Warts? - papillomavirus?

Protozoal

[Entamoeba histolytica]?
[Giardia lamblia]?
Trichomoniasis? - [Trichomonas vaginalis]?

Fungi

Candidiasis/Thrush? - [Candida albicans]? (not strictly an STD)

Other (not actually STDs but often considered as STDs)

Lice? - [Phthirius pubis]?
Scabies - [Sarcoptes scabiei]?