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Veterinary Pathology, Vol 34, Issue 2 152-156, Copyright © 1997 by American College of Veterinary Pathologists

ARTICLES

Intracellular Campylobacter-like organisms associated with rectal prolapse and proliferative enteroproctitis in emus (Dromaius novaehollandiae)

T. X. Lemarchand, T. N. Tully Jr, S. M. Shane and D. E. Duncan
Department of Pathology, School of Veterinary Medicine, Louisiana State University, Baton Rouge 70803, USA.

Rectal prolapse was the presenting clinical finding in a group of juvenile emus (Dromaius novaehollandiae). Gross findings included severely thickened and rugose distal rectal mucosae. Histologically, there were thickened villi, enterocyte hyperplasia, dilated glands filled with mucus and heterophils, and a dense infiltrate of heterophils, macrophages, lymphocytes, and plasma cells in the lamina propria. Examination of Warthin-Starry silver-stained sections revealed numerous apically located comma-shaped intracytoplasmic bacteria approximately 1 x 3 microns in size. Campylobacter-like organisms morphologically compatible with ileal symbiont intracellularis now known as Lawsonia intracellularis were seen via electron microscopy. Bacteria were further characterized by indirect immunofluorescence using monoclonal antibody specific for the 25-27-kd outer membrane protein of L. intracellularis.


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D. G. E. Smith, S. C. Mitchell, T. Nash, and S. Rhind
Gamma Interferon Influences Intestinal Epithelial Hyperplasia Caused by Lawsonia intracellularis Infection in Mice
Infect. Immun., December 1, 2000; 68(12): 6737 - 6743.
[Abstract] [Full Text] [PDF]


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Copyright © 1997 by the American College of Veterinary Pathologists.