The mother of a 4-year-old child notes that her child is sleeping poorly and scratching his anal area. You suspect the child may have pinworms. Which one of the following is the BEST method to make that diagnosis?

  •  Determine the titer of IgE antibody against the organism
  •  Examine transparent adhesive tape for the presence of eggs
  •  Examine the stool for the presence of cysts
  •  Examine a blood smear for the presence of microfilaria
  •   Examine the stool for the presence of trophozoites