Causes
Orbital cellulitis is mainly caused by several strains of bacteria, include Staphylococcus aureus and Streptococcus species. Nevertheless, other fungi and bacterial forms would also be the risk factor of this infection. In children less than 9 years old, the condition is often caused by only one strain of bacteria. In older kids and adults, multiple types can attack at the same time. This makes it much more difficult to treat. Nearly all of the reported cases of orbital cellulitis begin as bacterial sinus infections that are untreated and can spread behind your orbital septum, a fibrous and thin membrane covering the front of the eyes.
Orbital cellulitis could also be triggered when an infection of the tooth or any bacterial infection happening in other body parts enters the bloodstream and spreads. Some less common triggers include mouth abscesses, eye surgery complications, asthma, trapped foreign objects in the eyes, and an eye injury that penetrates your orbital septum. [2]
