<prompt> All of the following are sexually transmitted, exceptCandida albicansEchinococcusMolluscum contagiosumTreponema pallidum  <response>: Echinococcus granulosus is dog tapeworm. It is not an STD. Trichomonas is the only parasite causing STD. Molluscum contagiosum is a virus causing STD, whereas candida albicans is a fungus causing STD and T.pallidum is a bacteria causing STD Ref: Ananthanarayan Paniker;s textbook of microbiology, 9th edition. 