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Bacterial keratitis after penetrating keratoplasty: incidence, microbiological profile, graft survival, and visual outcome.
Ophthalmology. 2007 Jun; 114(6):1073-9.O

Abstract

PURPOSE

To determine the incidence, microbiological profile, graft survival, and factors influencing graft survival after the development of bacterial keratitis after penetrating keratoplasty (PK).

DESIGN

Retrospective case series.

PARTICIPANTS

One hundred two patients (102 eyes) treated at a single center during a 5-year period.

METHODS

Retrospective review of the medical records of every patient treated for culture-positive keratitis between January 1, 1998 and December 31, 2002 who previously had undergone penetrating keratoplasty at the King Khaled Eye Specialist Hospital.

MAIN OUTCOME MEASURES

Graft survival and visual outcome.

RESULTS

There were 2103 PKs performed and 102 (4.9%) cases of culture-positive keratitis during the study period. There were 168 bacterial isolates, of which 140 (83.3%) were gram positive, 28 (16.7%) were gram negative, and 1 (0.6%) was acid fast. Only 38 (37.3%) grafts remained clear after a mean follow-up of 985 days (range, 82-2284). The best graft survival was in eyes with PK for keratoconus (83.7%), whereas the poorest grat survival was for previously failed grafts (5.6%). By Kaplan-Meier analysis, there was an immediate steep decline in graft survival to 54.9%, followed by a slow decline to 47.2% by 1 year and 35.8% after 4 years. Factors associated with an increased risk of graft failure were the surgical indication for PK (P<0.001), increasing patient age (P = 0.004), smaller donor (P = 0.001) and recipient (P = 0.0003) graft size, history of previous microbial keratitis (P = 0.02) or endothelial rejection episodes (P = 0.02), and coexisting glaucoma (P = 0.001). The visual outcome was > or =20/40 in only 8 (8.2%) eyes and better than 20/200 in only 21 (21.6%) eyes.

CONCLUSION

The development of bacterial keratitis after PK is a serious complication that is associated with a high incidence of graft failure and poor visual outcome.

Authors+Show Affiliations

Department of Ophthalmology, King Khaled Eye Specialist Hospital, Riyadh, Saudi Arabia. mwagoner@kkesh.med.saNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

17275089

Citation

Wagoner, Michael D., et al. "Bacterial Keratitis After Penetrating Keratoplasty: Incidence, Microbiological Profile, Graft Survival, and Visual Outcome." Ophthalmology, vol. 114, no. 6, 2007, pp. 1073-9.
Wagoner MD, Al-Swailem SA, Sutphin JE, et al. Bacterial keratitis after penetrating keratoplasty: incidence, microbiological profile, graft survival, and visual outcome. Ophthalmology. 2007;114(6):1073-9.
Wagoner, M. D., Al-Swailem, S. A., Sutphin, J. E., & Zimmerman, M. B. (2007). Bacterial keratitis after penetrating keratoplasty: incidence, microbiological profile, graft survival, and visual outcome. Ophthalmology, 114(6), 1073-9.
Wagoner MD, et al. Bacterial Keratitis After Penetrating Keratoplasty: Incidence, Microbiological Profile, Graft Survival, and Visual Outcome. Ophthalmology. 2007;114(6):1073-9. PubMed PMID: 17275089.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Bacterial keratitis after penetrating keratoplasty: incidence, microbiological profile, graft survival, and visual outcome. AU - Wagoner,Michael D, AU - Al-Swailem,Samar A, AU - Sutphin,John E, AU - Zimmerman,M Bridgett, Y1 - 2007/02/01/ PY - 2006/06/29/received PY - 2006/10/07/revised PY - 2006/10/10/accepted PY - 2007/2/6/pubmed PY - 2007/6/20/medline PY - 2007/2/6/entrez SP - 1073 EP - 9 JF - Ophthalmology JO - Ophthalmology VL - 114 IS - 6 N2 - PURPOSE: To determine the incidence, microbiological profile, graft survival, and factors influencing graft survival after the development of bacterial keratitis after penetrating keratoplasty (PK). DESIGN: Retrospective case series. PARTICIPANTS: One hundred two patients (102 eyes) treated at a single center during a 5-year period. METHODS: Retrospective review of the medical records of every patient treated for culture-positive keratitis between January 1, 1998 and December 31, 2002 who previously had undergone penetrating keratoplasty at the King Khaled Eye Specialist Hospital. MAIN OUTCOME MEASURES: Graft survival and visual outcome. RESULTS: There were 2103 PKs performed and 102 (4.9%) cases of culture-positive keratitis during the study period. There were 168 bacterial isolates, of which 140 (83.3%) were gram positive, 28 (16.7%) were gram negative, and 1 (0.6%) was acid fast. Only 38 (37.3%) grafts remained clear after a mean follow-up of 985 days (range, 82-2284). The best graft survival was in eyes with PK for keratoconus (83.7%), whereas the poorest grat survival was for previously failed grafts (5.6%). By Kaplan-Meier analysis, there was an immediate steep decline in graft survival to 54.9%, followed by a slow decline to 47.2% by 1 year and 35.8% after 4 years. Factors associated with an increased risk of graft failure were the surgical indication for PK (P<0.001), increasing patient age (P = 0.004), smaller donor (P = 0.001) and recipient (P = 0.0003) graft size, history of previous microbial keratitis (P = 0.02) or endothelial rejection episodes (P = 0.02), and coexisting glaucoma (P = 0.001). The visual outcome was > or =20/40 in only 8 (8.2%) eyes and better than 20/200 in only 21 (21.6%) eyes. CONCLUSION: The development of bacterial keratitis after PK is a serious complication that is associated with a high incidence of graft failure and poor visual outcome. SN - 1549-4713 UR - https://www.unboundmedicine.com/medline/citation/17275089/Bacterial_keratitis_after_penetrating_keratoplasty:_incidence_microbiological_profile_graft_survival_and_visual_outcome_ DB - PRIME DP - Unbound Medicine ER -