Late onset endophthalmitis after cataract surgery is most often caused by:
Propionobacterium Acnes - most frequent isolate in chronic postoperative endophthalmitis followed by S.epidermidis, aerobic streptococci and Actinomyces species. Most frequent repoed organism is Propionobacterium Acnes. Ref: Clinical Eye Atlas - Page 700; Complications in Phacoemulsification: Avoidance, Recognition, and Management - Page 304.
Staphylococcus Epidermidis
Pseudomonas
Streptococcus Pyogenes
Propionobacterium Acnes