To report the first case of the Raoultella planticola endophthalmitis after the phacoemulsification and posterior chamber multi-focused intraocular lens (IOL) implantation.

A healthy 49-year-old male visited our clinic with a sudden visual disturbance and ocular pain 2 days after phacoemulsification and multi-focused IOL implantation in his right eye. On initial ophthalmic examination, severe corneal edema and hypopyon were observed. The retina could not be visualized due to vitreous opacity and anterior chamber inflammation. Therefore, the patient immediately underwent pars plana vitrectomy. Vancomycin hydrogen chloride (HCl) 0.3 mg/0.1 mL was injected into the anterior part and vancomycin HCl 1.0 mg/0.1 mL and ceftazidime 2.0 mg/0.1 mL were injected into the intravitreal part. The culture test of aqueous humor and vitreous body fluid revealed Raoultella planticola , thus, systemic antibiotic (ceftazidime) and antibiotic eye drops (vancomycin and ceftazidime) were administered. After 4 months of follow-up, best-corrected visual acuity improved to 20/20 in the affected eye after surgery.

In the present case, we found that endophthalmitis due to Raoultella planticola can be successfully treated. We suggest that atypical bacteria should be considered in the differential diagnosis of endophthalmitis after cataract surgery.