A retrospective and prospective study of megaesophagus in the parma wallaby (Macropus parma) at the San Diego Zoo, California, USA
| Autor: | Geoffrey W. Pye, Anne Burgdorf-Moisuk, Rebecca Papendick, Joseph A. Smith, Chris C. Hamlin-Andrus, Jamie A. Ivy |
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| Rok vydání: | 2012 |
| Předmět: |
Male
Pediatrics medicine.medical_specialty Transit time Sudden death California medicine Animals Prospective Studies Esophagus Prospective cohort study Retrospective Studies Macropodidae General Veterinary biology business.industry Megaesophagus Retrospective cohort study General Medicine Parma wallaby biology.organism_classification medicine.disease United States Surgery Esophageal Achalasia medicine.anatomical_structure Marsupialia Etiology Diverticulum Esophageal Animal Science and Zoology Animals Zoo Female business |
| Zdroj: | Journal of zoo and wildlife medicine : official publication of the American Association of Zoo Veterinarians. 43(1) |
| ISSN: | 1042-7260 |
| Popis: | At the San Diego Zoo (California, USA), 22 cases of megaesophagus were diagnosed in the parma wallaby (Macropus parma), yielding a prevalence of 21.1%. Parma wallabies often have no clinical signs until severe and chronic dilation of the esophagus is present. Clinical signs of advanced disease include weight loss, swelling of the cervical region, regurgitation without reswallowing of ingesta, short flight distance, depression, collapse, dyspnea, and sudden death. Retrospective and prospective studies at the San Diego Zoo and a multi-institutional survey in the United States were used to try to determine the cause of megaesophagus. The retrospective study did not identify an etiology. The prospective study revealed megaesophagus and severely delayed esophageal transit time in eight of eight animals. Myasthenia gravis, lead toxicosis, toxoplasmosis, and thyroid disease were eliminated as possible causes. Of 286 living and dead parma wallabies surveyed at other institutions, three cases of esophageal diverticulum and one case of megaesophagus were reported. The cause of megaesophagus in parma wallabies was not determined. |
| Databáze: | OpenAIRE |
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