Browsing by Author "Romalde, Jesus L."

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A review of bacterial disease outbreaks in rainbow trout (Oncorhynchus mykiss) reported from 2010 to 2022
(Wiley, 2023-10-30) Duman, Muhammed; Altun, Soner; Satıcıoğlu, İzzet Burçin; Romalde, Jesus L.; DUMAN, MUHAMMED; ALTUN, SONER; SATICIOĞLU, İZZET BURÇİN; Bursa Uludağ Üniversitesi/Veteriner Fakültesi/Su Hayvanları Hastalıkları Anabilim Dalı.; 0000-0001-7707-2705; 0000-0002-2721-3204; AAD-4156-2019; AAG-8518-2021; T-1697-2019
Outbreaks of bacterial infections in aquaculture have emerged as significant threats to the sustainable production of rainbow trout (Oncorhynchus mykiss) worldwide. Understanding the dynamics of these outbreaks and the bacteria involved is crucial for implementing effective management strategies. This comprehensive review presents an update on outbreaks of bacteria isolated from rainbow trout reported between 2010 and 2022. A systematic literature survey was conducted to identify relevant studies reporting bacterial outbreaks in rainbow trout during the specified time frame. More than 150 published studies in PubMed, Web of Science, Scopus, Google Scholar and relevant databases met the inclusion criteria, encompassing diverse geographical regions and aquaculture systems. The main bacterial pathogens implicated in the outbreaks belong to both gram-negative, namely Chryseobacterium, Citrobacter, Deefgea Flavobacterium, Janthinobacterium, Plesiomonas, Pseudomonas, Shewanella, and gram-positive genera, including Lactococcus and Weissella, and comprise 36 new emerging species that are presented by means of pathogenicity and disturbance worldwide. We highlight the main characteristics of species to shed light on potential challenges in treatment strategies. Moreover, we investigate the role of various risk factors in the outbreaks, such as environmental conditions, fish density, water quality, and stressors that potentially cause outbreaks of these species. Insights into the temporal and spatial patterns of bacterial outbreaks in rainbow trout aquaculture are provided. Furthermore, the implications of these findings for developing sustainable and targeted disease prevention and control measures are discussed. The presented study serves as a comprehensive update on the state of bacterial outbreaks in rainbow trout aquaculture, emphasizing the importance of continued surveillance and research to sustain the health and productivity of this economically valuable species.
Population genetic and evolution analysis of vibrio isolated from Turkish fish farms
(Elsevier, 2022-08-27) Bujan, Noemi; Romalde, Jesus L.; DUMAN, MUHAMMED; Altun, Soner; ALTUN, SONER; Satıcıoğlu, İzzet Burçin; SATICIOĞLU, İZZET BURÇİN; Bursa Uludağ Üniversitesi/Veteriner Fakültesi.; Bursa Uludağ Üniversitesi/Keleş Meslek Yüksekokulu.; 0000-0001-7707-2705; 0000-0003-4786-4773; 0000-0002-2721-3204; T-1697-2019; AAD-4156-2019
The genus Vibrio includes important pathogenic species for human and aquatic organisms such as Vibrio cholera, V. parahaemolyticus, V. vulnificus, V. anguillarum or V. harveyi. At present, Vibrionaceae family consists of > 190 described species, classified into nine genera. Vibrio are widespread in shellfish, finfish and marine ecosystems and show resourceful ecologies, which recognized as one of the most diverse bacterial groups for illuminating the genome evolution. In the present study, to clarify the relationship among aquatic species in the genus, a multilocus sequence analysis (MLSA) and typing (MLST) approach was applied to characterize 51 Vibrio isolates from Turkish fish farms, 146 strains deposited in the PubMLST database and 59 type strains from GenBank. For all studied isolates (n = 256), diversity analysis, population structure, determination of recombination, demographic history and gene flow were performed based on the MLST scheme. Vibrio isolates, subjected to the study, showed a high diversity within the Vibrio population and also genetic interactions into the genus. We found 17 new described sequence types by MLST analysis that were isolated from rainbow trout, sea bream and sea bass in Turkish fish farms, which clearly indicate that the genes underwent recombination frequently. While predominant sequence types were found in the presented study, differences of genotypes need to be evaluated in a disease situation or preventing measurements. The findings about genetic recombination possibly helps to understand differences of Vibrio infections in fish. Furthermore, elucidating of genetic variability within species shed light on providing effective measurements in aquaculture by vaccine production and drug applications.