Oestrus ovis sinusitis in a dog

Abstract

AbstractA 2‐year‐old, female Cane Corso was presented for chronic epistaxis, reverse sneezing and purulent nasal discharge. Clinical examination was unremarkable. Bloodwork revealed a mild anaemia. Computed tomography of the nasal cavity was consistent with right frontal sinusitis with suspected foreign bodies. Surgical approach of the right sinus by frontal osteotomy allowed to perform an endoscopically guided extraction of a 15‐mm white ringed worm and multiple black worm‐like structures. The evaluation by an EVPC diplomate confirmed an Oestrus ovis infestation. After endoscopic lavage of the frontal sinus, the dog went home with an ivermectin‐based treatment. It was presented 7 months later for a recurrence of the clinical signs. Tomography and surgical approach to the right frontal sinus revealed persistent presence of the O. ovis infestation. After surgical removal of the parasite and oral isoxazoline treatment, the dog had no signs of clinical recurrence. Follow‐up computed tomography scan confirmed complete resolution of the sinusitis.