Postoperative Serratia marcescens endophthalmitis.

Endophthalmitis after ophthalmic surgery is a rare but serious complication. Postoperative endophthalmitis presents clinically with conjunctival erythema and lid edema with eye pain and decrease in visual acuity. Diagnosis requires invasive culture techniques because postoperative external eye cultures are not reflective of intraocular organisms. The most common pathogens causing postoperative endophthalmitis are staphylococci and streptococci. Less common organisms associated with exogenous endophthalmitis include gram-negative aerobic bacilli and fungi. We report a case of Serratia marcescens postoperative endophthalmitis in a normal host.