Which fungus is most commonly
associated with orbital cellulitis in
patients with diabetic ketoacidosis.
a) Candida
b) Mucor
c) Aspergillus
d) Rhizopus
Correct Answer - C
Answer: C. Aspergillus
Orbital cellulitis term is reserved for infections behind the orbital
septum which may or may not spill over to lids. Bacterial OC is more
common in children and fulminant infection (& ischemic infarction)
with Mucor or Aspergillus typically affectspatients with diabetes (esp
ketoacidosis) and immunosuppression. Presentation is Extensive
swelling of lids with chemosis often obscure proptosis (i.e. most
commonly lateral & downwards). Proptosis with impaired mobility
resulting in diplopia Pain is severe, increased by movement of eye
or pressure Unilateral, tender, warm & red periorbital edema,painful
ophthalmoplegia.