Phycomycosis in a dog caused by unusual strains ofAbsidia corymbifera

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Abstract
A case of phycomycosis in a corgi bitch is described. The lesions were in the left cervical lymph nodes and in the larynx, and followed a bite by another dog. Three causal organisms were isolated and identified as unusual strains of Absidia corymbifera. On histology and in KOH squash preparations of the lesions the hyphae were characteristically swollen and distorted. In culture the vegetative hyphae and rhizoids of the isolates were stunted and swollen to varying degrees. The isolates grew much more slowly than a normal strain of A. corymbifera and one died when a small inoculum was stored at room temperature for 9 days. Both morphologically and in their temperature relations the 3 isolates graded into one another. This is the first occasion on which the causal organism has been isolated from phycomycosis in the dog.

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