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An isthmus at the caecocolical junction is an anatomical feature of domestic and wild equids

Clauss, Marcus ; Hummel, Jürgen ; Schwarm, Angela ; Steuer, Patrick ; Fritz, Julia ; Martin Jurado, Olga ; Tschudin, Anja ; Hatt, Jean-Michel

In: European Journal of Wildlife Research, 2008, vol. 54, no. 2, p. 347-351

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    Titre
    • An isthmus at the caecocolical junction is an anatomical feature of domestic and wild equids
    Auteur
    • Clauss, Marcus. Division of Zoo Animals, Exotic Pets and Wildlife, Vetsuisse Faculty, University of Zurich, Winterthurerstr. 260, 8057, Zurich, Switzerland
    • Hummel, Jürgen. Institute of Animal Science, Animal Nutrition Group, University of Bonn, Bonn, Germany
    • Schwarm, Angela. Leibniz Institute for Zoo and Wildlife Research (IZW), Berlin, Germany
    • Steuer, Patrick. Institute of Animal Science, Animal Nutrition Group, University of Bonn, Bonn, Germany
    • Fritz, Julia. Institute of Animal Physiology, Physiological Chemistry and Animal Nutrition, University of Munich, Munich, Germany
    • Martin Jurado, Olga. Division of Zoo Animals, Exotic Pets and Wildlife, Vetsuisse Faculty, University of Zurich, Winterthurerstr. 260, 8057, Zurich, Switzerland
    • Tschudin, Anja. Division of Zoo Animals, Exotic Pets and Wildlife, Vetsuisse Faculty, University of Zurich, Winterthurerstr. 260, 8057, Zurich, Switzerland
    • Hatt, Jean-Michel. Division of Zoo Animals, Exotic Pets and Wildlife, Vetsuisse Faculty, University of Zurich, Winterthurerstr. 260, 8057, Zurich, Switzerland
    Type de document
    • Postprint
    Langue
    • Anglais
    Publié dans
    • European Journal of Wildlife Research, 2008, vol. 54, no. 2, p. 347-351. Springer-Verlag
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:315770
    Summary
    The isthmus at the caecocolical junction in domestic equids is well described. Like another isthmus between the ansa proximalis coli (the colonic fermentation chamber or ‘large colon') and the colon transversum (the distal or ‘small' colon), this spot represents not only a potential anatomical feature contributing to particle ingesta retention but also an explicit predilection site for intestinal obstructions. The question whether this anatomical feature also occurs in wild equids is therefore of both physiological and medical interest but has not been addressed so far. In this paper, we report dissections of the large intestine of a domestic pony (Equus caballus f. dom.), a Przewalski horse (Equus przewalski) and a plains zebra (Equus burchelli). The intestinal tract section of all three animals were similar in length; each species displayed the caecocolical isthmus as well as the abrupt narrowing of the intestinal tract between the ‘large' and the ‘small' colon. Graphical descriptions of wild equid gastrointestinal anatomy should include these features