( Neisseria gonorrhoeae ) Syphilis ( Treponema pallidum ) Fungal Tinea cruris "Jock Itch" ( Trichophyton rubrum and others)—Sexually transmissible Candidiasis or "yeast Infection" Viral Viral hepatitis ( Hepatitis B virus )—saliva, venereal fluids. (Note: Hepatitis A and Hepatitis E are transmitted via the fecal-oral route ; Hepatitis C (liver cancer) is