Search results for "kala"
showing 10 items of 481 documents
Prevalence of genetically similar Flavobacterium columnare phages across aquaculture environments reveals a strong potential for pathogen control
2022
Intensive aquaculture conditions expose fish to bacterial infections, leading to significant financial losses, extensive antibiotic use and risk of antibiotic resistance in target bacteria. Flavobacterium columnare causes columnaris disease in aquaculture worldwide. To develop a bacteriophage-based control of columnaris disease, we isolated and characterized 126 F. columnare strains and 63 phages against F. columnare from Finland and Sweden in 2017. Bacterial isolates were virulent on rainbow trout (Oncorhynchus mykiss) and fell into four previously described genetic groups A, C, E and G, with genetic groups C and E being the most virulent. Phage host range studied against a collection of 2…
Complete Genome Sequence of Fish Pathogen Flavobacterium columnare Strain B185, Originating from Finland
2019
We report a complete genome sequence of a Finnish isolate of the fish pathogen Flavobacterium columnare. Using PacBio RS II sequencing technology, the complete circular genome of F. columnare strain B185 with 3,261,404 bp was obtained.
Whole-lake experiments reveal the fate of terrestrial particulate organic carbon in benthic food webs of shallow lakes
2014
Lake ecosystems are strongly linked to their terrestrial surroundings by material and energy fluxes across ecosystem boundaries. However, the contribution of terrestrial particulate organic carbon (tPOC) from annual leaf fall to lake food webs has not yet been adequately traced and quantified. In this study, we conducted whole-lake experiments to trace artificially added tPOC through the food webs of two shallow lakes of similar eutrophic status, but featuring alternative stable regimes (macrophyte rich vs. phytoplankton dominated). Lakes were divided with a curtain, and maize (Zea mays) leaves were added, as an isotopically distinct tPOC source, into one half of each lake. To estimate the …
Changing Scholarly Interpretations of Gertrude Bonnin (Zitkala-Ša)
2019
The Yankton Sioux writer and activist Gertrude Bonnin (1876-1938), better known by her Lakota name, Zitkala-Ša (Red Bird), was perhaps the most prominent Native American woman of the early twentieth century. In her writings, she consistently overturned conventions of language and meaning to subvert and criticize the American discourse of civilization. Bonnin’s use of English as a tool of resistance has invited misrepresentations and misunderstandings. Criticism can be distilled into three interpretive frameworks: liminal, assimilationist and bicultural. Liminal scholarship focuses on Bonnin’s 1900 semi-autobiography for the Atlantic Monthly, which laments the author’s separation from her bi…
Rich resource environment of fish farms facilitates phenotypic variation and virulence in an opportunistic fish pathogen
2020
Phenotypic variation is suggested to facilitate the persistence of environmentally growing pathogens under environmental change. Here, we hypothesized that the intensive farming environment induces higher phenotypic variation in microbial pathogens than natural environment, because of high stochasticity for growth and stronger survival selection compared to the natural environment. We tested the hypothesis with an opportunistic fish pathogen Flavobacterium columnare isolated either from fish farms or from natural waters. We measured growth parameters of two morphotypes from all isolates in different resource concentrations and two temperatures relevant for the occurrence of disease epidemic…
Glochidial infection by the endangered Margaritifera margaritifera (Mollusca) increased survival of salmonid host (Pisces) during experimental Flavob…
2021
AbstractCo-infections are common in host-parasite interactions, but studies about their impact on the virulence of parasites/diseases are still scarce. The present study compared mortality induced by a fatal bacterial pathogen, Flavobacterium columnare between brown trout infected with glochidia from the endangered freshwater pearl mussel, Margaritifera margaritifera, and uninfected control fish during the parasitic period and after the parasitic period (i.e. glochidia detached) in a laboratory experiment. We hypothesised that glochidial infection would increase host susceptibility to and/or pathogenicity of the bacterial infection. We found that the highly virulent strain of F. columnare c…
Svarīgāko klīnisko faktoru ietekme uz pacientu ārstēšanas rezultātu pie spontānām intracerebrālām hematomām
2018
Spontānas intracerebrālas hematomas sastāda 15% no visiem insultiem pieaugušo vecumā, bet šīs pataloģijas letalitāte pirmā mēneša laikā atbilst 40%. Pēdējās vadlīnijas (2015. gada) saglabājas daudz neskaidru jautājumu par optimālo terapiju, izvēles taktiku intracerebrālas hematomas ārstēšanā. Pētījuma mērķis: uzlabot pacientu stāvokļa novērtēšanu un attiecīgās ārstēšanas pielāgošanu pacientiem. Pētījuma rezultāti: Funkcionālais iznākums korelē ar GKS(r=0,5), spontānas intracerebrālas hematomas tilpumu (r=0,4) un smadzeņu viduslīnijas dislokācija (r=0,3). Spontānas intracerebrālas hematomas tilpums (p<0,0001), smadzeņu viduslīnijas dislokācija (p<0,0001), intraventrikulārās hemorāģijas esamī…
Puhummeko nyt rasismista?
2020
Rasismi-sanaan liittyy epävarmuutta siitä, mitä se on ja missä yhteyksissä sitä voi käyttää. Yksi syy hämmennykseen on se, että sanaa on opittu varomaan. Myös osa rasismintutkijoista käyttää tutkimuksessaan muita termejä välttyäkseen rasismi-sanan aiheuttamalta vastareaktiolta. Kun rasismia on ryhdytty korvaamaan ”turvallisemmilla” termeillä, niiden merkityssisällöt ovat alkaneet hämärtyä. Tutkimuskirjallisuudessa käytetään rinnakkain ja jopa samaa tarkoittavina syrjintää, toiseuttamista, ksenofobiaa, rodullistamista ja rasismia ilman, että termien välisiä merkityseroja useinkaan pohditaan tai avataan kunnolla. Sanahämmennyksen seurauksena rasismikeskustelua käydään tutkimuksessa – ja myös …
Comparing RADseq and microsatellites for estimating genetic diversity and relatedness : Implications for brown trout conservation
2019
The conservation and management of endangered species requires information on their genetic diversity, relatedness and population structure. The main genetic markers applied for these questions are microsatellites and single nucleotide polymorphisms (SNPs), the latter of which remain the more resource demanding approach in most cases. Here, we compare the performance of two approaches, SNPs obtained by restriction-site-associated DNA sequencing (RADseq) and 16 DNA microsatellite loci, for estimating genetic diversity, relatedness and genetic differentiation of three, small, geographically close wild brown trout (Salmo trutta) populations and a regionally used hatchery strain. The genetic di…