Candida albicans interface infection after deep anterior lamellar keratoplasty.

PURPOSE: To report a case of interface infection by Candida albicans after deep anterior lamellar keratoplasty (DALK). METHODS: A 30-year-old man with keratoconus underwent DALK. Four weeks after surgery, the patient developed multiple infiltrates in the graft-host interface with absence of intraocular infection. Donor rim cultures grew C. albicans. Penetrating keratoplasty (PK) was performed because of worsening of the infection despite topical, local, and systemic antifungal therapy. RESULTS: Cultures carried out on the excised donor cornea confirmed donor-to-host transmission of C. albicans. An aqueous tap taken before PK was negative. Six months after PK, the corneal graft was clear with no recurrence of infection. CONCLUSIONS: After DALK, in cases of donor graft microbial contamination, infection may develop at the graft-host interface. This may delay or prevent direct intraocular penetration of microorganisms, reducing the risk of development of endophthalmitis. PK may be needed to eradicate the infection in cases where conservative treatment fails.

Frequency of positive donor rim cultures after penetrating keratoplasty using hypothermic and organ-cultured donor corneas.

PURPOSE: To compare the frequency of positive rim cultures after penetrating keratoplasty using corneas preserved by hypothermic and organ culture storage. To evaluate the influence of standard procurement techniques on the frequency of microbial donor rim contamination. METHODS: Six hundred four donor corneas stored at 31 degrees C and 214 at 4 degrees C were studied. Microbiology studies were carried out during organ culture storage, and corneas with positive medium cultures were discarded. Frequency of postoperative positive rim cultures was related to the type of corneal storage and procurement technique used. RESULTS: Thirty-nine (6.4%) corneas with positive medium cultures were discarded during organ culture. Microbiology reports of 628 donor rims cultures from 671 (94%) consecutive transplants were reviewed. Positive rim cultures resulted in 24 (3.8%) cases. None of the patients developed endophthalmitis. The frequency of postoperative positive rim cultures was greater after hypothermic than organ culture storage, being 9.8% and 1.3%, respectively (chi(2) = 24.9; P < 0.001). With organ culture storage, the frequency of positive rim cultures was 1.3% and 1.4% after enucleation and in situ corneal excision, respectively (chi(2) = 0.03; P = 0.638). After hypothermic storage, positive rim cultures were found in 8% of the corneas procured using enucleation and 12% of the corneas excised in situ (chi(2) = 0.829; P = 0.254). CONCLUSIONS: Organ culture storage allows one to recognize and discard corneas with microbial contamination during storage. This method significantly reduces the frequency of postoperative positive rim cultures compared with hypothermic storage. Procurement methods do not influence the percentage of positive rim cultures.