Each of the following statements concerning mucormycosis is correct EXCEPT:

  •  Hyphae typically invade blood vessels and cause necrosis of tissue.
  •  The fungi that cause mucormycosis are transmitted by airborne asexual spores.
  •  Tissue sections from a patient with mucormycosis show budding yeasts.
  •  Ketoacidosis in diabetic patients is a predisposing factor to mucormycosis.