First case of Aureobasidium pullulans in a dog after sterilization surgery in Chile.

In November 2024, a female Chilean Chihuahua presented with a limb lesion that did not heal after spaying. The diagnosis indicated Aureobasidium pullulans infection. The antifungigram showed susceptibility to itraconazole, treatment with this drug together with bilateral amputation resulted in a complete recovery. The phylogenetic tree of the ITS gene showed differences with other sequences of the same species from animals and lichens. This case highlights this environmental fungus as a potential pathogen in dogs.