Results 31 to 40 of about 1,510 (199)

Purification of Piscirickettsia salmonis and associated phage particles [PDF]

Diseases of Aquatic Organisms, 2001
Piscirickettsia salmonis was isolated from cell culture using differential centrifugation and purified on a 30% Percol gradient. The purity of the preparation was assessed by transmission electron microscopy and phage-like particles were found to be associated with some of the P. salmonis isolates examined.
S A, Yuksel, K D, Thompson, A E, Ellis, A, Adams   +3 more
openaire   +2 more sources

Epidemiology of Salmonid Rickettsial Septicemia (SRS) in Farmed Salmon: The Role of Sea Lice Infestations in Mortality Risk. [PDF]

J Fish Dis
ABSTRACT Piscirickettsia salmonis, the causal agent of salmonid rickettsial septicemia (SRS), is the main pathogen affecting farmed salmonids in Chile. Outbreaks of SRS lead to substantial economic losses for producers. Many determinants related to SRS outcomes are still poorly understood.
Diethelm-Varela B, Atero N, Córdova-Bührle F, Rezende EL, Gelcich S, Sandoval O, Navarro C, Mardones FO.   +7 more
europepmc   +2 more sources

Disease resistance in Atlantic salmon (Salmo salar): coinfection of the intracellular bacterial pathogen Piscirickettsia salmonis and the sea louse Caligus rogercresseyi. [PDF]

PLoS ONE, 2014
BACKGROUND: Naturally occurring coinfections of pathogens have been reported in salmonids, but their consequences on disease resistance are unclear. We hypothesized that 1) coinfection of Caligus rogercresseyi reduces the resistance of Atlantic salmon to
Jean Paul Lhorente, José A Gallardo, Beatriz Villanueva, María J Carabaño, Roberto Neira   +4 more
doaj   +1 more source

Antigenic characterization of the salmonid pathogen Piscirickettsia salmonis [PDF]

Infection and Immunity, 1996
Piscirickettsia salmonis, the etiological agent of salmonid rickettsial septicemia, was purified from infected immortal chinook salmon (Oncorhynchus tshawytscha) embryo cells by a combination of differential and Percoll density gradient centrifugation. Immune sera from rabbits immunized with purified whole cells of P. salmonis reacted with four protein
M A, Kuzyk, J C, Thorton, W W, Kay
openaire   +2 more sources

Purification of Piscirickettsia salmonis and partial characterization of antigens [PDF]

Diseases of Aquatic Organisms, 1998
Piscirickettsia salmonis is the etiological agent of salmonid rickettsial septicemia, an economically significant disease affecting the salmon aquaculture industry. As with other rickettsial pathogens, antigenic analysis of P. salmonis has been limited by the inherent difficulties of purifying an intracellular organism away from host cell material.
M N, Barnes, M L, Landolt, D B, Powell, J R, Winton   +3 more
openaire   +2 more sources

Exploring the Diversity Within the Genus Francisella – An Integrated Pan-Genome and Genome-Mining Approach

Frontiers in Microbiology, 2020
Pan-genome analysis is a powerful method to explore genomic heterogeneity and diversity of bacterial species. Here we present a pan-genome analysis of the genus Francisella, comprising a dataset of 63 genomes and encompassing clinical as well as ...
Rajender Kumar, Jeanette E. Bröms, Anders Sjöstedt   +2 more
doaj   +1 more source

Stress response and virulence factors in bacterial pathogens relevant for Chilean aquaculture: current status and outlook of our knowledge

Biological Research, 2022
The study of the stress responses in bacteria has given us a wealth of information regarding the mechanisms employed by these bacteria in aggressive or even non-optimal living conditions.
Derie E. Fuentes, Lillian G. Acuña, Iván L. Calderón   +2 more
doaj   +1 more source

Why Does Piscirickettsia salmonis Break the Immunological Paradigm in Farmed Salmon? Biological Context to Understand the Relative Control of Piscirickettsiosis

Frontiers in Immunology, 2022
Piscirickettsiosis (SRS) has been the most important infectious disease in Chilean salmon farming since the 1980s. It was one of the first to be described, and to date, it continues to be the main infectious cause of mortality.
Marco Rozas-Serri
doaj   +1 more source

Membrane vesicles from Piscirickettsia salmonis induce protective immunity and reduce development of salmonid rickettsial septicemia in an adult zebrafish model [PDF]

, 2017
Infections caused by the facultative intracellular bacterial pathogen Piscirickettsia salmonis remains an unsolved problem for the aquaculture as no efficient treatments have been developed.
Julia Tandberg, Hanne C. Winther-Larsen, Tandberg, Julia, Winther-Larsen, Hanne Cecilie, Erik Ropstad, Tandberg, Julia Isabel, Winther-Larsen, Hanne C., Lagos, Leidy, Alejandro J. Yáñez, Yáñez, Alejandro J., Leidy Lagos, Gaarder, Mona, Cristian Oliver, Mona Gaarder, Ropstad, Erik, Oliver, Cristian   +15 more
core   +1 more source

Piscirickettsia salmonis Produces a N-Acetyl-L-Homoserine Lactone as a Bacterial Quorum Sensing System-Related Molecule

Frontiers in Cellular and Infection Microbiology, 2021
Piscirickettsia salmonis is the etiological agent of piscirickettsiosis, the most prevalent disease in salmonid species in Chilean salmonids farms. Many bacteria produce N-acyl-homoserine lactones (AHLs) as a quorum-sensing signal molecule to regulate ...
Pamela Ruiz, Pamela Ruiz, Daniela Sepulveda, José Miguel Vidal, José Miguel Vidal, Romina Romero, David Contreras, Javier Barros, Carlos Carrasco, Nathaly Ruiz-Tagle, Alex Romero, Alex Romero, Homero Urrutia, Homero Urrutia, Cristian Oliver   +14 more
doaj   +1 more source