Highly active antiretroviral therapy is used in the treatment of:

Highly active antiretroviral therapy is used in the treatment of:
 a. AIDS.
  b. poliomyelitis.
  c. infectious mononucleosis.
  d. West Nile virus.

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Upper respiratory infections are caused by which type of virus?
 a. togavirus
  b. rhinovirus
  c. retrovirus
  d. hepadnavirus

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HIV infection is caused by which type of virus?
 a. togavirus
  b. rhinovirus
  c. retrovirus
  d. hepadnavirus

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The smallest of all pathogens are:
 a. bacteria.
  b. viruses.
  c. chlamydia.
  d. rickettsiae.

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Bacteria-like organisms that inhabit insects and other parasites are:
 a. staphylococcus.
  b. streptococcus.
  c. trachoma.
  d. rickettsiae.