Endoscopic Evaluation of Spirocercosis in Four Dogs

Abstract

Spirocerca lupi induces fibroproliferative oesophageal nodules, which may progress to obstruction or aneurysm. Four dogs were presented with anorexia, chronic vomiting, pyrexia, persistent vocalisation, and poor response to symptomatic therapy. Laboratory evaluation revealed mild leucocytosis with unremarkable serum biochemistry. Endoscopic examination identified nodular lesions in the distal thoracic oesophagus, with live worms visualised in two cases. Barium contrast radiography demonstrated intraluminal mass effects. Treatment with doramectin administered at 14‑day intervals for three cycles, combined with antiemetics and pantoprazole, resulted in progressive clinical improvement and regression of nodules on follow‑up imaging.