Publications by authors named "Rebecca Duncan"

Article Synopsis
  • Reproducibility is crucial in science as it boosts confidence in findings and enables comparison of data, yet evaluating it can be challenging, especially with RNA sequencing (RNA-seq) where multiple steps can introduce variance.
  • This study specifically examines the reproducibility of gene expression data from bacteria in cystic fibrosis models, utilizing samples from three labs and different sequencing pipelines to draw comparisons.
  • The results indicate high reproducibility of gene expression across labs, despite some variance introduced by different sequencing methods, with both pipelines detecting over 80% of the same differentially expressed genes, confirming the validity of RNA-seq data comparisons.
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Laboratory models are central to microbiology research, advancing the understanding of bacterial physiology by mimicking natural environments, from soil to the human microbiome. When studying host-bacteria interactions, animal models enable investigators to examine bacterial dynamics associated with a host, and in the case of human infections, animal models are necessary to translate basic research into clinical treatments. Efforts toward improving animal infection models are typically based on reproducing host genotypes/phenotypes and disease manifestations, leaving a gap in how well the physiology of microbes reflects their behavior in a human host.

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Objective: To evaluate the preliminary efficacy, acceptability, and feasibility of Step Up to Prevention, a technology-enhanced intervention to promote human papillomavirus (HPV) vaccination uptake among young minority and low-income women.

Design: A pilot randomized controlled trial.

Setting: Two federally supported outpatient clinics in a large city in the northeastern United States.

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Article Synopsis
  • * A study using advanced imaging techniques assessed the biomolecular composition of these microalgae over six weeks in different Arctic fjord sites, revealing their ability to adapt to changing sea ice conditions.
  • * Environmental changes, such as nitrogen limitation and rising water temperatures, can lead to a shift in the algae's nutrient composition, potentially impacting carbon transfer in the marine ecosystem due to climate change effects.
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  • The objective of the study was to gather insights from Squamish Nation citizens to co-develop a model for foraging walks aimed at improving heart health among Indigenous women.
  • The study, which involved sharing circles with community members and Elders, revealed a general lack of knowledge about foraging and nutrition related to heart health, but participants expressed a strong desire to learn more about traditional foods through land-based activities.
  • The findings indicated that foraging walks could enhance various dimensions of heart health while also leading to the development of a template for future programs and educational resources within the community.
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Arctic sea-ice diatoms fuel polar marine food webs as they emerge from winter darkness into spring. Through their photosynthetic activity they manufacture the nutrients and energy that underpin secondary production. Sea-ice diatom abundance and biomolecular composition vary in space and time.

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  • The complete genome sequence of complex strain STEN00241 was obtained from a patient sputum sample.
  • The genome consists of a single contig and has a total length of 4,751,329 nucleotides.
  • The GC content of this genome is measured at 66.5%.
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Organisms across the tree of life colonize novel environments by partnering with bacterial symbionts. These symbioses are characterized by intimate integration of host/endosymbiont biology at multiple levels, including metabolically. Metabolic integration is particularly important for sap-feeding insects and their symbionts, which supplement nutritionally unbalanced host diets.

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Laboratory models are critical to basic and translational microbiology research. Models serve multiple purposes, from providing tractable systems to study cell biology to allowing the investigation of inaccessible clinical and environmental ecosystems. Although there is a recognized need for improved model systems, there is a gap in rational approaches to accomplish this goal.

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1 Background: Critical gaps in the U.S. healthcare system perpetuate adverse reproductive health outcomes for Black people.

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Primary production in the Southern Ocean is dominated by diatom-rich phytoplankton assemblages, whose individual physiological characteristics and community composition are strongly shaped by the environment, yet knowledge on how diatoms allocate cellular energy in response to ocean acidification (OA) is limited. Understanding such changes in allocation is integral to determining the nutritional quality of diatoms and the subsequent impacts on the trophic transfer of energy and nutrients. Using synchrotron-based Fourier transform infrared microspectroscopy, we analysed the macromolecular content of selected individual diatom taxa from a natural Antarctic phytoplankton community exposed to a gradient of fCO levels (288-1263 µatm).

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Aim: To explore patients' experiences of virtual consultations during the COVID-19 Alert Level 4 lockdown in New Zealand.

Method: A single-practice retrospective phone survey exploring patients' satisfaction with the phone consultation process during Alert Level 4 lockdown.

Results: Of 259 eligible patients, 108 (42%) participated in the survey.

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High adolescent pregnancy rates in New Zealand (NZ) are influenced by limited access to contraception. In this paper, we discuss using a proactive contraception provision (PCP) model to overcome barriers that prevent effective contraceptive uptake. After outlining steps taken to assess acceptability of PCP in NZ, we cover three issues to consider with PCP: the range of contraceptives that should be offered, the age range that should be approached, and finally whether to include adolescents without uteruses.

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Indirect assessments are a commonly used component of functional behavior assessment by behavior analysts in practice who work with individuals with severe behavior disorders. Although used frequently, closed-ended indirect assessments have repeatedly been shown to have low to moderate interrater reliability and poor concurrent validity with functional analysis. Recently, the use of open-ended interviews has become more commonly adopted in applied clinical practice, despite no studies evaluating the psychometric properties of such assessments.

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INTRODUCTION Adolescents' uptake of long-acting reversible contraceptives (LARCs) in New Zealand is low. We created the concept of a proactive LARC provision programme to overcome barriers to LARC uptake. Previously, this concept was discussed with adolescents and positively received.

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Aim: In New Zealand, there are sexually active adolescents who are using poor or no methods of contraception, and who do not intend to become pregnant. The most effective methods of contraception suitable to this population are long acting reversible contraceptive (LARC) methods. A proactive LARC provision (PLP) programme has been proposed, and this study investigates whether such a model would be acceptable to adolescents.

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Background: Transfer delays of critically ill patients from other hospitals' emergency departments (EDs) to an appropriate referral hospital's intensive care unit (ICU) are associated with poor outcomes.

Objectives: We hypothesized that an innovative Critical Care Resuscitation Unit (CCRU) would be associated with improved outcomes by reducing transfer times to a quaternary care center and times to interventions for ED patients with critical illnesses.

Methods: This pre-post analysis compared 3 groups of patients: a CCRU group (patients transferred to the CCRU during its first year [July 2013 to June 2014]), a 2011-Control group (patients transferred to any ICU between July 2011 and June 2012), and a 2013-Control group (patients transferred to other ICUs between July 2013 and June 2014).

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Plant sap-feeding insects are widespread, having evolved to occupy diverse environmental niches despite exclusive feeding on an impoverished diet lacking in essential amino acids and vitamins. Success depends exquisitely on their symbiotic relationships with microbial symbionts housed within specialized eukaryotic bacteriocyte cells. Each bacteriocyte is packed with symbionts that are individually surrounded by a host-derived symbiosomal membrane representing the absolute host-symbiont interface.

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Article Synopsis
  • Horizontal gene transfer has significantly impacted microbial evolution, and this study explores its role in animals, specifically vinegar flies and aphids.
  • The research identifies the transfer of the cdtB gene, associated with bacterial toxins, into the genomes of these insects, linking these genes to bacteriophage that affect symbiotic bacteria in aphids.
  • Findings suggest that cdtB is actively expressed during vulnerable life stages in these insects and may provide a defense mechanism against natural predators.
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In New Zealand, there are adolescents who are at risk of pregnancy and who do not want to become pregnant, but are not using contraception. Cost and other barriers limit access to contraception. To address the gap between contraceptive need and contraceptive access, this paper puts forward the concept of proactive contraception provision, where adolescents are offered contraceptives directly.

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Background: Acute aortic dissection (AoD) is a hypertensive emergency often requiring the transfer of patients to higher care hospitals; thus, clinical care documentation and compliance with the Emergency Medical Treatment and Active Labor Act (EMTALA) is crucial. The study assessed emergency providers (EP) documentation of clinical care and EMTALA compliance among interhospital transferred AoD patients.

Methods: This retrospective study examined adult patients transferred directly from a referring emergency department (ED) to a quaternary academic center between January 1, 2011 and September 30, 2015.

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Introduction: Pain is the most common complaint for an emergency department (ED) visit, but ED pain management is poor. Reasons for poor pain management include providers' concerns for drug-seeking behaviors and perceptions of patients' complaints. Patients who had objective findings of long bone fractures were more likely to receive pain medication than those who did not, despite pain complaints.

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Objective: To identify salient beliefs about human papillomavirus (HPV) vaccine completion among young adult women who live in economically disadvantaged urban communities and to describe the integration of those beliefs into the development of a mobile health (mHealth) application to promote vaccine completion.

Design: Theory-based, community-informed, mHealth application development process.

Setting: Two federally supported family planning clinics in a large metropolitan area in the Northeastern region of the United States.

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Facilitating the evolution of new gene functions, gene duplication is a major mechanism driving evolutionary innovation. Gene family expansions relevant to host/symbiont interactions are increasingly being discovered in eukaryotes that host endosymbiotic microbes. Such discoveries entice speculation that gene duplication facilitates the evolution of novel, endosymbiotic relationships.

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