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- Odynophagia (painful swallowing)
- Melena due to the ulceration of lesions in the esophageal
- Excessive salivation
- Weakness
- Difficulty breathing and chronic cough due to esophageal obstruction caused by tumors
- Anorexia
- Lethargy and pale mucous membranes caused by chronic hemorrhagic anemia due to ulceration of esophageal tumor
- Lameness
- Swollen hind limbs
- Diarrhea
- Diagnosis through fecal examination which may contain larvae or eggs, however these shed sporadically so may not be present despite infestation
- Gastroscopy investigation which may show nodule or an adult worm
- Radiographic examination of the respiratory tract which may show a dense mass in the esophagus indicative of the parasite.
- Positive-contrast barium study may increase visibility of the mass
- Computed tomography scans may also provide diagnostic assistance
- Direct visualization of masses under anesthesia using endoscopy
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