Botfly Cephenemyia ulrichii larvae in the nasal cavity and nasopharynx of a dog with respiratory signs.

A Finnish Lapphund dog with acute upper respiratory signs and gagging was presented at veterinary clinic. During rhinoscopy, ten 1- to 2-mm long, actively moving larvae were found in the dog's nasal cavity and nasopharynx and identified as Cephenemyia ulrichii (Diptera: Oestridae). This moose (Alces alces) parasite is widespread in Finland but has not been reported before from an accidental canine host. Clinical signs resolved with imidacloprid/moxidectin spot-on formulation.