Bilateral Panophthalmitis in the Giant Pacific Octopus (Octopus dolfleini)
IAAAM 1998
Joseph M. Scimeca1; Michael McGinnis1; Craig Stephen2; Skip Young2
1Pathology, University of Texas, Medical Branch, Galveston, TX, USA; 2Vancouver Aquarium, Vancouver, BC, Canada

Abstract

A giant pacific octopus was quarantined waiting for display at the Vancouver Aquarium when he showed signs of photophobia which developed into progressively occurring eye lid closure. The animal was anesthetized and exploration of the eye and culture of surrounding tissues was unrewarding. The octopus became increasingly moribund and was humanely euthanized. Gross examination of both eyes revealed extensive conjunctival swelling and edema, bilateral corneal opacites extending into the sclera. The eyes were fixed in 10% buffered neutral formalin and prepared for biopsy. On cut section the normal architecture of the eye was obscured by the amount of necrosis and in both the anterior and posterior chambers. The histopathological lesions will be discussed as well as comparisons of the normal and lesioned architecture of the octopus eye. The etiology of the lesion will also be discussed as well as the possible conditions that would allow this lesion to develop.

References

1.  Ajello L. 1975. Phaeohyphomycosis: definition and etiology. Proceedings of the Third International Conference on the Mycoses, Sao Paolo, Brazil, 1974. Pan. Am. Health Organ. Sci. Publ. 304:126-130.

2.  Ajello L, McGinnis MR, Camper J. 1977. An outbreak of phaeohyphomycosis in rainbow trout caused by Scolecobasidium humicola. Mycopathologia 62:15-22.

3.  Richards PH, Holliman A, Helgason S. 1978. Naturally occurring Exophiala salmonis infection in Atlantic salmon (Salmo salar L.). J. Fish Dis. 1:357-369.

4.  Ross AJ, Yasutake WT. 1973. Scolecobasidium humicola, a fungal pathogen of fish. J.Fish. Res. Bd. Can. 30:994-995.

Speaker Information
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Joseph M. Scimeca, Jr, DVM, PhD
Animal Resources Center and Department of Pathology
University of Texas, Medical Branch
Galveston, TX, USA


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