AUTHOR=Aurich Sophie , Schneider Juliane , Brangsch Hanka , Koets Ad , Melzer Falk , Ewers Christa , Prenger-Berninghoff Ellen TITLE=Brucella suis biovar 1 infection in a dog with orchitis in Germany JOURNAL=Frontiers in Veterinary Science VOLUME=Volume 10 - 2023 YEAR=2023 URL=https://www.frontiersin.org/journals/veterinary-science/articles/10.3389/fvets.2023.1233118 DOI=10.3389/fvets.2023.1233118 ISSN=2297-1769 ABSTRACT=In 2021, a case of canine brucellosis was diagnosed in a dog with ascending orchitis presented to a veterinary practice in Germany. Serologic testing excluded Brucella (B.) canis as causative agent, but molecular analysis revealed the presence of B. suis biovar 1. Since biovar 1 is not endemic in Europe and the dog had no history of travel to endemic areas, a comprehensive epidemiological investigation was conducted using whole genome sequence data to determine the source of infection. We describe the clinical progress in the animal and a potential infection of a veterinary clinic employee. The findings highlight the importance of considering less common Brucella species as a possible cause of canine brucellosis. The data also emphasize that it is quite challenging to identify Brucella species in a routine diagnostic laboratory and to conduct epidemiological investigations to unveil possible transmission routes.