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144 result(s) for "Barker, Clare"
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Postcolonial fiction and disability : exceptional children, metaphor and materiality
This book is the first study of disability in postcolonial fiction. Focusing on canonical novels, it explores the metaphorical functions and material presence of disabled child characters. Barker argues that progressive disability politics emerge from postcolonial concerns, and establishes dialogues between postcolonialism and disability studies.
Genomic epidemiology reveals geographical clustering of multidrug-resistant Escherichia coli ST131 associated with bacteraemia in Wales
Antibiotic resistance is a significant global public health concern. Uropathogenic Escherichia coli sequence type (ST)131, a widely prevalent multidrug-resistant clone, is frequently associated with bacteraemia. This study investigates third-generation cephalosporin resistance in bloodstream infections caused by E. coli ST131. From 2013-2014 blood culture surveillance in Wales, 142 E. coli ST131 genomes were studied alongside global data. All three major ST131 clades were represented across Wales, with clade C/ H 30 predominant ( n  = 102/142, 71.8%). Consistent with global findings, Welsh strains of clade C/ H 30 contain β -lactamase genes from the bla CTX-M-1 group ( n  = 65/102, 63.7%), which confer resistance to third-generation cephalosporins. Most Welsh clade C/ H 30 genomes belonged to sub-clade C2/ H 30Rx (58.3%). A Wales-specific sub-lineage, named GB-WLS.C2, diverged around 1996-2000. An introduction to North Wales around 2002 led to a localised cluster by 2009, depicting limited genomic diversity within North Wales. This investigation emphasises the value of genomic epidemiology, allowing the detection of genetically similar strains in local areas, enabling targeted and timely public health interventions. Escherichia coli ST131 is a globally dominant multidrug resistant clone associated with high rates of recurring urinary tract infections. In this genomic epidemiology study, the authors describe the evolution, population structure, and antimicrobial resistance in 142 E. coli ST131 samples from Wales, UK.
Microevolution of Campylobacter jejuni during long-term infection in an immunocompromised host
Campylobacteriosis typically manifests as a short-lived, self-limiting gastrointestinal infection in humans, however prolonged infection can be seen in cases with underlying immunodeficiency. Public Health England received 25 isolates of Campylobacter jejuni from an individual with combined variable immunodeficiency over a period of 15 years. All isolates were typed and archived at the time of receipt. Whole genome sequencing (WGS) and antimicrobial susceptibility testing were performed to examine the relatedness of the isolates and to investigate the changes in the genome that had taken place over the course of the infection. Genomic typing methods were compared to conventional phenotypic methods, and revealed that the infection was caused by a single, persistent strain of C. jejuni belonging to clonal complex ST-45, with evidence of adaptation and selection in the genome over the course of the infection. Genomic analysis of sequence variants associated with antimicrobial resistance identified the genetic background behind rRNA gene mutations causing variable levels of resistance to erythromycin. This application of WGS to examine a persistent case of campylobacteriosis provides insight into the mutations and selective pressures occurring over the course of an infection, some of which have important clinical relevance.
Species-wide whole genome sequencing reveals historical global spread and recent local persistence in Shigella flexneri
Shigella flexneri is the most common cause of bacterial dysentery in low-income countries. Despite this, S. flexneri remains largely unexplored from a genomic standpoint and is still described using a vocabulary based on serotyping reactions developed over half-a-century ago. Here we combine whole genome sequencing with geographical and temporal data to examine the natural history of the species. Our analysis subdivides S. flexneri into seven phylogenetic groups (PGs); each containing two-or-more serotypes and characterised by distinct virulence gene complement and geographic range. Within the S. flexneri PGs we identify geographically restricted sub-lineages that appear to have persistently colonised regions for many decades to over 100 years. Although we found abundant evidence of antimicrobial resistance (AMR) determinant acquisition, our dataset shows no evidence of subsequent intercontinental spread of antimicrobial resistant strains. The pattern of colonisation and AMR gene acquisition suggest that S. flexneri has a distinct life-cycle involving local persistence. Dysentery is a disease in which the intestine becomes inflamed due to infection by bacteria, viruses or other microbes. Of the bacteria that can cause dysentery, bacteria called Shigella are most often responsible. Humans can acquire Shigella through contaminated food or water. Over the last century, improvements to sanitation combined with access to clean drinking water and better food hygiene have decreased the number of cases of dysentery in many countries. However, the disease continues to be common in low-income countries, especially in young children. One species of Shigella bacteria, called S. flexneri, causes far more cases of dysentry than other species of Shigella. Across the world, there are many different strains of S. flexneri, but it is not clear how these strains are related to each other, or how variable the genes that they carry are—known as genetic diversity. Here, Connor, Barker, Baker et al. used a technique called whole genome sequencing to map the evolutionary relationships of over 300 S. flexneri samples collected from around the globe over the past 100 years. This revealed that the bacterial strains can be split into seven groups that each have distinct geographic ranges and combinations of genes that enable the bacteria to infect humans. Many of the strains of bacteria within these groups seem to have colonized, and remained in, quite small geographic areas over long periods of time. This is different to other Shigella species, which appear to have spread between continents far more frequently over much shorter timescales. Connor, Barker, Baker et al.'s findings reveal that S. flexneri is more diverse than other Shigella bacteria, and suggest that the ability of strains to persist in local areas may have contributed to the species' long-term success. These results point towards the importance of the provision of clean water in the fight against S. flexneri, and underline the need for a greater understanding of how disease-causing bacteria colonize and interact with the local environment.
Warrior Genes
This essay reads Māori writer Alan Duff’s controversial Once Were Warriors trilogy in relation to a scientific study on Māori “warrior genes.” It analyzes the novels’ “epigenetic imaginary,” tracing their staging of the nature-nurture debate and their motifs of degenerated warriorhood and genetic memory. It shows how Duff’s genetic determinism reduces occasions for social justice and postcolonial reparation. The essay argues that the interpretation of scientific research data was conditioned by Duff’s fictional construction of violent contemporary Māori warriors, and that the warrior genes controversy forms an instructive warning regarding the power of fiction to shape scientific realities.
Intoxicated method, thinking in difference: a response to Mel Chen
[...]the analysis of toxic discourse redresses what Diane Price Herndl 3 identified in 2005 as an avoidance of critical theory, and especially a lack of poststructuralist analysis, within the medical humanities, an omission that obscures 'what it means to locate disease or disability somewhere other than in a concrete, physical body' (p. 595).
Don’t turn your back on the symptoms of psychosis: the results of a proof-of-principle, quasi-experimental intervention to reduce duration of untreated psychosis
Background No evidence based approach to reduce duration of untreated psychosis (DUP) has been effective in the UK. Existing interventions have many components and have been difficult to replicate. The majority of DUP in Birmingham, UK is accounted for by delays within mental health services (MHS) followed by help-seeking delay and, we hypothesise, these require explicit targeting. This study examined the feasibility and impact of an intervention to reduce DUP, targeting help-seeking and MHSs delays. Methods A dual-component intervention, comprising a direct care pathway, for 16-25 year olds, and a community psychosis awareness campaign, using our youth-friendly website as the central hub, was implemented, targeting the primary sources of care pathway delays experienced by those with long DUP. Evaluation, using a quasi-experimental, design compared DUP of cases in two areas of the city receiving early detection vs detection as usual, controlling for baseline DUP in each area. Results DUP in the intervention area was reduced from a median 71 days (mean 285) to 39 days (mean 104) following the intervention, with no change in the control area. Relative risk for the reduction in DUP was 0.74 (95 % CI 0.35 to 0.89; p  = .004). Delays in MHSs and help-seeking were also reduced. Conclusions Our targeted approach appears to be successful in reducing DUP and could provide a generalizable methodology applicable in a variety of healthcare contexts with differing sources of delay. More research is needed, however, to establish whether our approach is truly effective. Trial registration ISRCTN45058713 - 30 December 2012.
Reduction in Fracture Rate and Back Pain and Increased Quality of Life in Postmenopausal Women Treated with Teriparatide: 18-Month Data from the European Forsteo Observational Study (EFOS)
The European Forsteo Observational Study was designed to examine the effectiveness of teriparatide in postmenopausal women with osteoporosis treated for up to 18 months in normal clinical practice in eight European countries. The incidence of clinical vertebral and nonvertebral fragility fractures, back pain, and health-related quality of life (HRQoL, EQ-5D) were assessed. Spontaneous reports of adverse events were collected. All 1,648 enrolled women were teriparatide treatment-naive, 91.0% of them had previously received other anti-osteoporosis drugs, and 72.8% completed the 18-month study. A total of 168 incident clinical fractures were sustained by 138 (8.8%) women (821 fractures/10,000 patient-years). A 47% decrease in the odds of fracture in the last 6-month period compared to the first 6-month period was observed ( P  < 0.005). Mean back pain VAS was reduced by 25.8 mm at end point ( P  < 0.001). Mean change from baseline in EQ-VAS was 13 mm by 18 months. The largest improvements were reported in the EQ-5D subdomains of usual activities and pain/discomfort. There were 365 adverse events spontaneously reported, of which 48.0% were considered related to teriparatide; adverse events were the reason for discontinuation for 79 (5.8%) patients. In conclusion, postmenopausal women with severe osteoporosis who were prescribed teriparatide in standard clinical practice had a significant reduction in the incidence of fragility fractures and a reduction in back pain over an 18-month treatment period. This was associated with a clinically significant improvement in HRQoL. Safety was consistent with current prescribing information. These results should be interpreted in the context of the open-label, noncontrolled design of the study.