Infectious keratitis in severe limbal stem cell deficiency: characteristics and risk factors.

PURPOSE

To evaluate the incidence, clinical and microbiological characteristics and risk factors of infectious keratitis in patients with limbal stem cell deficiency (LSCD).

METHODS

Retrospective comparative case series of 35 patients with severe LSCD.

RESULTS

The mean follow-up time was 46 months. Infectious keratitis were mainly caused by Gram positive bacteria (94%). Only 7 infections (37%) healed under fortified adapted antibiotics. In 8 cases (42%), amniotic membrane transplantation was required and in 4 cases (21%) «à chaud» keratoplasty was performed. Significant risk factors associated with infectious keratitis were: soft contact lens extended wear, history of persistent epithelial defects, number of quadrants of corneal vascularization, re-epithelialization time after amniotic membrane or corneal transplantation, and use of corticosteroid or cyclosporin eye drops.

CONCLUSION

Infectious keratitis in LSCD is frequent and severe. The restoration of the epithelial barrier integrity and a careful use of therapeutic contact lenses may help to prevent infection.