Abiotrophia species as a cause of endophthalmitis following cataract extraction

Microorganisms of the genus Abiotrophia, members of the oral flora, are kno wn as important causes of bacterial endocarditis. In this study, we report two individual cases of acute vitreous infection caused by Abiotrophia adia cens and Abiotrophia defectiva approximately a week after cataract extracti on. Abiotrophia isolates were recovered by cultivation of vitreous humor on chocolate agar and identified via conventional and API 20 Strep identifica tion systems. An 83-year-old male patient (A) and an 80-year old female pat ient (B) demonstrated almost identical symptoms of infectious endophthalmit is manifested as hypopyon and opaque media. The vision of both patients was reduced to detection of hand motion in the left and the right eyes, respec tively. An emergency pars plana core vitrectomy was performed, and intraocu lar antibiotics were administered to each patient, who presented 8 months a part in two different institutions. Patients A and B Here treated with an i ntravitreal injection of vancomycin-amikacin and vancomycin ceftazidime, re spectively, which resulted in complete recovery.