Intracameral Bacteriophage Injection as Postoperative Prophylaxis for Enterococcus faecalis–Induced Endophthalmitis After Cataract Surgery in Rabbits

Tatsuma Kishimoto, Waka Ishida, Isana Nakajima, Takako Ujihara, Takashi Suzuki, Jumpei Uchiyama, Shigenobu Matsuzaki, Ken Fukuda

Research output: Contribution to journalArticlepeer-review

Abstract

Purpose: Post–cataract surgery bacterial endophthalmitis is a serious postoperative complication, and Enterococcus spp.–induced endophthalmitis reportedly has a partic-ularly poor visual prognosis. This study aimed to demonstrate the prophylactic effect of postoperative intracameral phage administration in Enterococcus faecalis–induced endophthalmitis after cataract surgery in rabbits. Methods: Endophthalmitis was induced in rabbits by injecting E. faecalis into the anterior chamber just after lensectomy while simultaneously administering either phage phiEF24C-P2 or vehicle. Retinal function was evaluated using electroretinogra-phy. The number of viable bacteria and myeloperoxidase (MPO) activity in the eye and histopathologic examinations were analyzed 48 hours after infection. Results: In the vehicle-treated group, retinal function at 24 hours after infection was impaired, and the number of viable bacteria and MPO activity in the eye increased 48 hours later. In the phage-administered group, retinal function was maintained; the number of viable bacteria and MPO activity were significantly suppressed. Histopathologic examinations showed disruption of the retinal layers and the presence of numer-ous E. faecalis in the lens capsule and vitreous cavity in vehicle-treated eyes. In contrast, retinal structures were intact, and no E. faecalis staining was observed in phage-treated eyes. No retinal dysfunction was observed in the group that received phage only without lensectomy; almost no phage was detected in the eyes after 14 days of treatment. Conclusions: Phage administration in the anterior chamber did not cause retinal dysfunction and suppressed postoperative endophthalmitis in rabbits. Translational Relevance: In vivo results of intracameral phage administration suggest that phages are a promising prophylactic candidate for postoperative endophthalmitis.

Original languageEnglish
Article number2
JournalTranslational Vision Science and Technology
Volume11
Issue number4
DOIs
Publication statusPublished - 2022
Externally publishedYes

Keywords

  • bacteriophage
  • cataract surgery
  • endophthalmitis
  • enterococcus faecalis
  • prophylaxis

ASJC Scopus subject areas

  • Biomedical Engineering
  • Ophthalmology

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