Fusarium species are ubiquitous soil saprophytes and plant pathogens. In human patients, Fusarium species are known to infect the cornea, nails, and bum eschars of healthy individuals and disseminated infections are reported in immunosuppressed individuals (Hiemenz, et al. 1990). Superficial and deep Fusarium infections are similarly chronicled in a myriad of animals, such as sharks, sea turtles, fish, pinnipeds (e. g. California sea lions and grey seals), horses, cattle, and an alligator (Smith, et al. 1989). A number of Fusarium species are recognized as etiologic agents of disease.

The occurrence of Fusarium associated dermatitides involving an Atlantic white-sided dolphin, a pygmy sperm whale, and a harbor seal at Mystic Marin life Aquarium is reported. In each case, the infected animal had incurred some major, recent stressor (i.e. stranding, long distance transport, relocation). The lesions appeared as raised, firm nodules with erythematous, ulcerated, and sometimes friable surfaces. The nodules extended over the heads, trunks, and posterior portions of the animals. Microbial cultures revealed fungal elements in addition to various bacterial agents, such as Staphylococcus and Enterobacter. Culturing of the fungal isolates on multiple media demonstrated the characteristic reproductive structures associated with Fusarium species. Concomitant histopathologic examination of biopsy specimens from each individual confirmed the presence of fungal elements consistent with those of a zygomycete within epidermal tissues. Ketaconazole was administered per os in conjunction with antibacterial therapy, and the representative dermatitis of each individual resolved.

Dermatitis associated with Fusariunt species infection was identified and treated in two species of cetacean and one species of pinniped. Fusarium species may be opportunistic invaders in cases involving immunosuppression and/or integumentary compromise.