I ammnot a vet but do know of this. I sugget you talk to your vet. Most infections are not diagnosed until necropsy. The granulomas vary greatly in size and location in the esophagus but usually are so characteristic as to be diagnostic, even if the worms are no longer present. Worms and granulomas may be present in the lungs, trachea, mediastinum, stomach wall, or other abnormal locations. Healed aneurysms of the aorta persist for the life of the dog and are diagnostic of previous infection. When sarcomas are associated with the infection, the esophageal lesion usually is larger and often contains cartilage or bone; metastases frequently are present in the lungs, lymph nodes, heart, liver, or kidneys.
Treatment and Control: In endemic areas, dogs should be prevented from eating dung beetles, frogs, mice, lizards, etc, and not fed raw chicken scraps. Treatment is often not practical. However, efficacy has been demonstrated with disophenol (10 mg/kg, SC, 2 doses 1 wk apart) and doramectin (0.2 mg/kg, SC, 3 doses at 2-wk intervals; 0.4 mg/kg, SC, 6 doses at 2-wk intervals; 0.8 mg/kg, SC, 2 doses 1 wk apart; additional treatments may be required), although these treatments are not approved. Surgical removal usually is unsuccessful because of the large areas of the esophagus involved.