https://phaidra.vetmeduni.ac.at/o:4014 Septic tendosynovitis in a breeding ram and isolation of Mycoplasma arginini Eva, Eva Eva Eva 0009-0007-1901-8381 Suchowski, Marcel Marcel Suchowski Voigt, Katja Katja Voigt Spergser, Joachim Joachim Spergser 0000-0002-0164-0179 University of Veterinary Medicine Vienna Riehm, Julia M. Julia M. Riehm 0000-0002-0767-5217 Wiley journal article open access eng A breeding ram was submitted to a veterinary hospital due to persistent pneumonia, emaciation and high fever. Upon submission, it also showed severe weight-bearing lameness on all four legs with highly fluid-filled digital flexor tendon sheaths. Additionally, a mild brisket sore was diagnosed. The postmortem examination revealed a chronically active fibrinosuppurative inflammation of the digital flexor tendon sheaths on all four legs. Additionally, a distinctive chronically active necrotising, suppurative and abscess-forming soft tissue inflammation was identified in the sternal area. Microbiological examination of tissue samples from different locations revealed a mixed bacterial colonisation including Escherichia coli, Klebsiella oxytoca and Trueperella pyogenes. Additionally, Mycoplasma arginini was detected in samples of the lung and tendon sheaths. Genome sequencing and characterisation of M. arginini revealed the presence of a prophage associated with arthritogenesis in related Mycoplasma species. However, the contribution of M. arginini to the diagnosed tendosynovitis cannot be conclusively clarified. Mortality Sheep http://creativecommons.org/licenses/by-nc-nd/4.0/ https://phaidra.vetmeduni.ac.at/api/object/o:4014/download 10.1002/vrc2.1077 https://phaidra.vetmeduni.ac.at/o:605 application/pdf Veterinary Record Case Reports issn:2052-6121 VoR Veterinary Record Case Reports 13 1 8.19 MB 2025