A case of Corynebacterium propinquum microbial keratitis after amniotic membrane transplantation
Abstract Background Amniotic membrane transplantation (AMT) is a relatively safe procedure with few complications. Postoperatively, patients are treated with topical antibacterial eye drops. However, even antibacterial drug administration cannot completely prevent antimicrobial-resistant keratitis....
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2025-05-01
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| Series: | BMC Ophthalmology |
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| Online Access: | https://doi.org/10.1186/s12886-025-04159-9 |
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| author | Yuto Yukari Toshiki Shimizu Takahiko Hayashi Yusuke Hara Ami Igarashi Satoru Yamagami |
| author_facet | Yuto Yukari Toshiki Shimizu Takahiko Hayashi Yusuke Hara Ami Igarashi Satoru Yamagami |
| author_sort | Yuto Yukari |
| collection | DOAJ |
| description | Abstract Background Amniotic membrane transplantation (AMT) is a relatively safe procedure with few complications. Postoperatively, patients are treated with topical antibacterial eye drops. However, even antibacterial drug administration cannot completely prevent antimicrobial-resistant keratitis. This paper presents a case of Corynebacterium propinquum keratitis associated with AMT. Case presentation An 84-year-old female patient who underwent AMT for bullous keratopathy developed keratitis with colony formation on the transplanted amniotic membrane graft 45 days postoperatively. The colony was scraped, cultured, and identified as C. propinquum using matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF–MS). Subsequently, topical treatment improved the infection while relieving the pain. Conclusion To the best of our knowledge, this is the first reported case of C. propinquum keratitis associated with amniotic membrane grafts. Although AMT is a relatively safe procedure with few complications, careful observation is required to diagnose and treat possible postoperative infection. Immunosuppressed patients, including those post-AMT, may suffer from antimicrobial-resistant keratitis, necessitating microbial identification and drug susceptibility testing such as MALDI-TOF–MS. |
| format | Article |
| id | doaj-art-a15d0b779f1044a0bd2238ce687e2419 |
| institution | DOAJ |
| issn | 1471-2415 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | BMC |
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| series | BMC Ophthalmology |
| spelling | doaj-art-a15d0b779f1044a0bd2238ce687e24192025-08-20T03:16:33ZengBMCBMC Ophthalmology1471-24152025-05-012511510.1186/s12886-025-04159-9A case of Corynebacterium propinquum microbial keratitis after amniotic membrane transplantationYuto Yukari0Toshiki Shimizu1Takahiko Hayashi2Yusuke Hara3Ami Igarashi4Satoru Yamagami5Department of Ophthalmology, Nihon University Itabashi Hospital, Itabashi CityDepartment of Ophthalmology, Nihon University Itabashi Hospital, Itabashi CityDepartment of Ophthalmology, Nihon University Itabashi Hospital, Itabashi CityDepartment of Ophthalmology, Nihon University Itabashi Hospital, Itabashi CityDepartment of Ophthalmology, Nihon University Itabashi Hospital, Itabashi CityDepartment of Ophthalmology, Nihon University Itabashi Hospital, Itabashi CityAbstract Background Amniotic membrane transplantation (AMT) is a relatively safe procedure with few complications. Postoperatively, patients are treated with topical antibacterial eye drops. However, even antibacterial drug administration cannot completely prevent antimicrobial-resistant keratitis. This paper presents a case of Corynebacterium propinquum keratitis associated with AMT. Case presentation An 84-year-old female patient who underwent AMT for bullous keratopathy developed keratitis with colony formation on the transplanted amniotic membrane graft 45 days postoperatively. The colony was scraped, cultured, and identified as C. propinquum using matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF–MS). Subsequently, topical treatment improved the infection while relieving the pain. Conclusion To the best of our knowledge, this is the first reported case of C. propinquum keratitis associated with amniotic membrane grafts. Although AMT is a relatively safe procedure with few complications, careful observation is required to diagnose and treat possible postoperative infection. Immunosuppressed patients, including those post-AMT, may suffer from antimicrobial-resistant keratitis, necessitating microbial identification and drug susceptibility testing such as MALDI-TOF–MS.https://doi.org/10.1186/s12886-025-04159-9Amniotic membraneKeratitisC. propinquumMatrix-Assisted Laser Desorption/Ionization-Time of Flight Mass Spectrometry |
| spellingShingle | Yuto Yukari Toshiki Shimizu Takahiko Hayashi Yusuke Hara Ami Igarashi Satoru Yamagami A case of Corynebacterium propinquum microbial keratitis after amniotic membrane transplantation BMC Ophthalmology Amniotic membrane Keratitis C. propinquum Matrix-Assisted Laser Desorption/Ionization-Time of Flight Mass Spectrometry |
| title | A case of Corynebacterium propinquum microbial keratitis after amniotic membrane transplantation |
| title_full | A case of Corynebacterium propinquum microbial keratitis after amniotic membrane transplantation |
| title_fullStr | A case of Corynebacterium propinquum microbial keratitis after amniotic membrane transplantation |
| title_full_unstemmed | A case of Corynebacterium propinquum microbial keratitis after amniotic membrane transplantation |
| title_short | A case of Corynebacterium propinquum microbial keratitis after amniotic membrane transplantation |
| title_sort | case of corynebacterium propinquum microbial keratitis after amniotic membrane transplantation |
| topic | Amniotic membrane Keratitis C. propinquum Matrix-Assisted Laser Desorption/Ionization-Time of Flight Mass Spectrometry |
| url | https://doi.org/10.1186/s12886-025-04159-9 |
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