RT Conference Proceedings
T1 Shewanella putrefaciens Fish pathogenic strains contain plasmids that are absent in the probiotic strain s. Putrefaciens pdp11
A1 Pérez-Gómez, Olivia
A1 Domínguez-Maqueda, Marta
A1 Grande-Pérez, Ana
A1 Esteve, Consuelo
A1 Seoane, Pedro
A1 Tapia-Paniagua, Silvana Teresa
A1 Balebona-Accino, María del Carmen
A1 Moriñigo-Gutiérrez, Miguel Ángel
K1 Acuicultura - Patógenos
AB Probiotics are live microorganisms that confer a health benefit to the host when administered in adequate amounts.Shewanella putrefaciens Pdp11 has been described as a probiotic for farmed fish species such as Solea senegalensis andSparus aurata. In contrast, other strains of S. putrefaciens have been described as pathogenicfor other cultured fish damage of the mouth, extensive skin discoloration, exophthalmia, ascites and badodour. The S. putrefaciens group was recovered from freshwater samples taken at the L′Albufera system, along autumn–winter 2015. Its counts significantly increased in freshwater parallel to hypoxia and temperature rising. Shewanellae strainswere identified as S. putrefaciens and S. xiamenensis by 16S rRNA gene sequencing. These isolates recovered from sickeels or freshwater were virulent for European eel by IP challenge (LD50 106 CFU g−1 body weight. The plasmids playsan important role in the genes transfer and insertion then there can been implicated in antibiotics resistance, degradativepathway and pathogenicity characteristics. The genetic variation conducted by plasmid could inducean impact in probiotic proprieties. In this research, we searched the present or absent of plasmids in pathogenic andprobiotic strains of S. putrefaciens. As well as, this plasmids implication in development of virulence factors.The probiotic strain S. putrefaciens Pdp11 did not present plasmid, which was only found in two of the five pathogenic strains.The results allowed us to discard the probiotic Pdp11 could present a pathogenic characteristic as the TA type II system asa virulence factor and its self-regulating characteristics, which may be behind its probiotic nature, making the Pdp11 strainunique in comparison to other S. putrefaciens strains.
PB Aquaculture europe congress
YR 2022
FD 2022
LK https://hdl.handle.net/10630/25191
UL https://hdl.handle.net/10630/25191
LA eng
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 20 ene 2026