Massilia timonae as cause of chronic endophthalmitis following cataract surgery.

UNLABELLED: This is the first report of chronic postoperative endophthalmitis caused by Massilia timonae. The gram-negative bacillus was isolated from a patient who developed chronic endophthalmitis after cataract extraction. The microorganism was cultured on brain-heart infusion broth and identified using the 16S rRNA sequence analysis. Biochemically, the organism was positive for catalase and oxidase and negative for arginine dihydrolase. It was pansensitive to β-lactams, fluoroquinolones, aminoglycosides, and trimethoprim-sulfamethoxazole but resistant to aztreonam. Massilia timonae is a new bacterium implicated in postoperative chronic endophthalmitis. Eubacterial polymerase chain reaction was useful in identifying M timonae because phenotyping testing and conventional algorithms could not identify it. FINANCIAL DISCLOSURE: No author has a financial or proprietary interest in any material or method mentioned.