Staphylococcus

General: Gram-positive coccus Staphylococcus aureus; most common cause of suppurative infection in humans; more common in patients with a previous disorder, such as diabetes, thyroid disease, renal failure, or malnutrition; although most S. aureus isolates from other sources are encapsulated, capsules have not been noted in ocular isolates.

Ocular: Uveitis; hypopyon; conjunctivitis; keratitis; cellulitis of lid; meibomianitis; ptosis; blepharitis; endophthalmitis; dacryocystitis; increased intraocular pressure; orbital periosteitis.

Clinical: Tissues hypertonic, edematous, and painful; lesion liquefies, forming creamy yellow pus; fever; nausea; vomiting; cough; dyspnea; abdominal pain; diarrhea; bloody stools; dehydration; shock.

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Smolin G, Okumoto M. Staphylococcal blepharitis. Arch Ophthalmol 1977; 95:812-816.