• We examined the growth of six fungi during 18 days at 4°C in a corneal preservation medium containing 2.5% chondroitin sulfate (K-Sol). The number of viable organisms decreased with time for all six fungi, the average decrease being 65%. The risk of transplanting fungal organisms with a donor cornea stored for up to 18 days at 4°C in preservation media containing chondroitin sulfate is no greater than that with the same cornea stored for only one day.