Multilocus sequence analysis (MLSA) of a Nocardia cyriacigeorgica strain causing severe bovine mastitis in Bosnia and Herzegovina

We report a case of severe bovine mastitis caused by N. cyriacigeorgica that did not respond to conventional antimicrobial therapy in a small holding in Bosnia and Herzegovina. After isolation of the pathogen, further identification by routine microbiological methods was not possible. Susceptibility to antimicrobials was tested using the disc diffusion method according to published recommendations. The sample was also tested by MALDI-ToF MS with inconclusive results. In addition, 16S rRNA sequence analysis, verified by multilocus sequence analysis (MLSA) using the gyrB, 16S rRNA, secA1, and hsp65 sequences, confirmed the species N. cyriacigeorgica. To our knowledge, this is the first report of isolation of N. cyriacigeorgica from a clinical case of bovine mastitis in a European dairy farm and the first MLSA method approach to distinguish a Nocardia spp. strain isolated from animals.PMID:37676786 | DOI:10.1556/004.2023.00893
Source: Acta Veterinaria Hungarica - Category: Veterinary Research Authors: Source Type: research