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Mongolian Gerbils as an Animal Model of Wound Healing

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Fungal keratitis in a gopher tortoise (Gopherus polyphemus).

Debbie A Myers¹, Ramiro Isaza, Gil Ben-Shlomo

¹University of Florida, College of Veterinary Medicine, Veterinary Medical Teaching Hospital, P.O. Box 100101, Gainesville, Florida 32610-0101, USA. dmyersvet@yahoo.com

Journal of Zoo and Wildlife Medicine : Official Publication of the American Association of Zoo Veterinarians

|September 15, 2009

Summary

A wild gopher tortoise experienced blindness due to fungal keratitis, a serious eye infection. Treatment with miconazole helped heal ulcers, but one eye was permanently damaged.

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Area of Science:

Veterinary Ophthalmology
Herpetology
Mycology

Background:

Gopher tortoises (Gopherus polyphemus) are a keystone species in the southeastern United States.
Ocular diseases in free-ranging reptiles are infrequently reported.
Trauma and subsequent infection can lead to severe ocular pathology in chelonians.

Observation:

A free-ranging gopher tortoise presented with trauma and blindness.
Physical examination revealed bilateral corneal ulcerations, scarring, and phthisis bulbi of the left globe.
Histopathology of fibrinous exudate showed necrotic conjunctivitis with fungal hyphae.

Findings:

Ocular cultures from the left eye isolated a mixed fungal flora, including Curvularia sp. and Aspergillus sp.
Treatment with miconazole ophthalmic solution resulted in ulcer healing but persistent corneal edema.
The right eye healed with scarring, while the left eye remained phthisical after two months of multifaceted treatment.

Implications:

This case represents the first report of fungal keratitis in a wild reptile, specifically a gopher tortoise.
Fungal keratitis can cause severe ocular damage in reptiles, potentially leading to blindness.
Early diagnosis and treatment are crucial for managing fungal eye infections in wildlife, though outcomes can vary.