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Can Vet J. 2012 May;53(5):543-8.

Clinical, ultrasonographic, and pathologic findings in 70 camels (Camelus dromedarius) with Johne's disease.

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Department of Veterinary Medicine, College of Agriculture and Veterinary Medicine, Qassim University, Saudi Arabia.


This study evaluated the use of ultrasonography for the diagnosis of Johne's disease in camels (Camelus dromedarius). Seventy camels with confirmed Johne's disease were examined by ultrasonography and subsequent necropsy; 15 healthy camels were included as controls. The most outstanding findings were visible enlargement of the mesenteric lymph nodes in 52 (74%) camels. Lesions had either echogenic (26%; n = 18) or anechoic (69%; n = 48) capsule and the contents were either anechoic (21%; n = 15), echogenic (27%; n = 19), or heterogeneous (46%; n = 32). Clumps of echogenic tissue interspersed with fluid pockets were imaged between the intestinal loops in 9 (13%) camels. There was mild, moderate, or severe thickening and corrugation of the intestinal wall, excessive anechoic fluid in the abdominal cavity in 18 (26%) camels, increased hepatic brightness in 30 (43%) camels, and pericardial and pleural effusions in 22 (31%) camels. Sensitivity values for detecting intestinal lesions and enlarged mesenteric lymph nodes were 95% and 84%, respectively.

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