_____50. Most STIs are
                A.bacterial                  B.viral                 C.fungal                   D. protozoan
_____51. Which one of the following venereal diseases isdiagnosed by observing Gram
                negative diplococci in the phagocytic leukocytes from a urogenitalswab particularly
                in men?
                A. syphilis         B.gonorrhea          C. nonspecificurethritis         D.trichomoniasis
_____52. Which stage of syphilis is not infectious?
                A.primary                B.secondary                 C.tertiary                 D. chancroid
_____53. A distinctive symptom of secondary syphilis is
                A. hard chancre with an exudativecenter              B. skin rash on the palms andsoles    Â
                C. gummatouslesion                                             D. paresis
_____54. The VDRL nontreponemal serological test involves allthe following except
                A. reagin-type antibody      B.cardiolipin      C. syphilisspirochete      D. blood
_____55. Ophthalmia neonatorum is caused by
                A. Treponema pallidum                           B.Chlamydiatrachomatis     Â
                C.Acanthamoeba                                    D.Neisseria gonorrhoeae   Â
_____56. Which one of the following is most often associatedwith vaginosis?
                 A. Gardnerella vaginalis                        B.Candida albicans                  Â
                 C.E.coli                                                  D. herpes simplex virus
_____57. Which one of the following diseases kills the mostpeople in the world each year?
                 A.tuberculosis            B.measles           C. hepatitis B          D.cholera            Â
_____58. Which one of the following organisms has never beencultured on bacterial media?
                A. Mycobacterium tuberculosis                   B.Neisseria gonorrhoeae
                C. Mycoplasma pneumoniae                         D.Treponema pallidum                      Â
_____59. Which one of the following statements about syphilis istrue?
               A.the disease was probably introduced to the New World by Columbus’crew
                B. T. pallidum probably evolved from the organism thatcauses yaws
                C. the causative organism has many virulence factors that enable itto invade
                D. it is a disease that was originally described by Galen inancient Greece