The Treponema pallidum of syphilis can be transmitted by

The Treponema pallidum of syphilis can be transmitted by
 
  A. sexual or oral contact.
  B. contact with contaminated objects.
  C. clothing.
  D. the fecal-oral route.

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Which of the following diseases may manifest themselves with painful genital ulcers?
 
  A. chancroid
  B. rubeola
  C. herpes
  D. leptospirosis
  E.
  chancroid AND herpes

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The sexually transmitted disease characterized by painful genital ulcers is
 
  A. chancroid.
  B. syphilis.
  C. gonorrhea.
  D. trachoma.

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During which stage of pregnancy can Treponema pallidum cross the placenta and possibly infect the fetus?
 
  A. first trimester.
  B. second trimester.
  C. third trimester.
  D. any stage.

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In which disease is a gumma formed?
 
  A. primary syphilis
  B. secondary gonorrhea
  C. tertiary syphilis
  D. diphtheria