RT info:eu-repo/semantics/article T1 Clinical and Pathological Findings Associated with Mycobacteriosis in Captive Syngnathids A1 Montero, Estefanía A1 Rojo Solís, Carlos A1 de Castro, Noelia A1 Fernández, Miguel A1 Pérez Pérez, Valentín A1 Corpa, Juan M. A1 Ortega, Joaquín A2 Sanidad Animal K1 Sanidad animal K1 Granuloma K1 Mycobacteriosis K1 Mycobacterium chelonae K1 Mycobacterium fortuitum K1 Mycobacterium marinum K1 Pathology K1 Pipefish K1 Sea dragon K1 Seahorse K1 Syngnathids K1 3109 Ciencias Veterinarias AB [EN] Mycobacteriosis is an important disease that affects captive and wild aquatic fish. Syngnathids are susceptible to infection by non-tuberculous mycobacteria. The aim of this study was to describe clinical signs, and macroscopic and histological lesions in 25 syngnathids and the molecular characterization of the causative mycobacteria. Clinical presentation ranged from sudden death to non-specific signs, including anorexia, poor body condition, weight loss and marked dyspnea with increased respiratory effort and rate. Gross lesions were mostly ulcers on the tail and small white nodules in the liver, coelomic cavity and inside the eye. The most affected organs were gills, liver, intestine and coelomic mesentery. Microscopic lesions consisted of areas of multifocal to diffuse granulomatous inflammation and bacterial emboli with numerous intralesional acid-fast bacilli. Epithelioid cells, multinucleated giant cells, lymphocytes and fibrous connective tissue, which are commonly observed in granulomatous inflammation, were not observed here. In the real-time PCR, M. fortuitum, M. chelonae and M. marinum common primers, Mycobacterium spp. were detected in 4, 7 and 14 individuals, respectively. In addition, this is the first description of mycobacteriosis found in Syngnathus acus PB MDPI LK https://hdl.handle.net/10612/18724 UL https://hdl.handle.net/10612/18724 NO Montero, E., Rojo-Solís, C., de Castro, N., Fernández, M., Pérez, V., Corpa, J. M., & Ortega, J. (2022). Clinical and Pathological Findings Associated with Mycobacteriosis in Captive Syngnathids. Animals, 12(23). https://doi.org/10.3390/ANI12233259 DS BULERIA. Repositorio Institucional de la Universidad de León RD 17-may-2024