Mycobacterium avium subsp. paratuberculosis in a captive wood bison herd: diagnostics and disease dynamics overtime ...

• Main Author: Hernandez Reyes, Ana Laura
• Format: Article in Journal/Newspaper
• Language: English
• Published: Graduate Studies 2024
• Subjects: Paratuberculosis; Wood bison; Johne's disease; Veterinary Science; Canada; Bison bison athabascae; Wood Bison; Bison bison bison
• Online Access: https://dx.doi.org/10.11575/prism/42936; https://prism.ucalgary.ca/handle/1880/118092

Mycobacterium avium subsp. paratuberculosis (Map) has been identified in a wide range of domestic and wild ruminants. Captive wildlife can experience JD-related epidemiological scenarios similar to those in cattle. In wood bison (Bison bison athabascae), an iconic and keystone species in Canada, Map DNA has been reported in fecal samples from clinically healthy animals. However, there is apparently no published information regarding clinical presentation of JD and its significance in wood bison. The objective of this study was to determine to what extent Map can affects a captive bison herd located in northeastern Alberta, Canada. The first part of the study was the detection and isolation of Map in clinical cases. Necropsies were performed on six wood bison and 24 samples were collected from each bison. The highest frequency of positive samples was observed with tissue culture 62.5% (90/144) followed by F57/IS900 qPCR 43.1% (56/130), and histopathology 29% (38/131). Distal jejunum and its associated lymph ...