Publications by authors named "O'CONNELL D"

The western honey bee Apis mellifera is the world's most important managed pollinator. However, globally honey bees have been facing increasing colony losses due to a combination of stress factors. Foremost among these is the invasive mite Varroa destructor, which is the pathogen most commonly linked to colony losses.

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: Objective data examining match trends and applicant characteristics are in high demand given the stakes involved with the orthopaedic surgery match. Our study sought to analyse the trends among matched orthopaedic surgery applicants to clarify how medical students can best prepare for and assess their chances of a successful orthopaedic residency match. : We used the publicly available National Residency Matching Program (NRMP) tool to gather characteristics for matched and unmatched orthopaedic surgery applicants from 2016 to 2022 and compare the probability of matching for all applicants versus each subgroup of reported applicant characteristics using risk difference (RD) and two-tailed p-values.

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Background: Lung computed tomography (CT) scan image registration is being used for lung function analysis such as ventilation. Given the high sensitivity of functional analyses to image registration errors, an image registration error scoring tool that can measure submillimeter image registration errors is needed.

Purpose: To propose an image registration error scoring tool, termed λ, whose spatial sensitivity can be used to quantify image registration errors in steep image gradient regions under realistic noise conditions.

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  • * This study found that complement factor H (FH) acts as an ICOS ligand, enhancing Treg survival and function while increasing TGF-beta and IL-10 secretion, which suppresses T-cell activity.
  • * Analysis in mouse models and patient data revealed that higher FH levels are linked to more Tregs and poorer patient outcomes, indicating that targeting FH could improve glioma treatment and prognosis.
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Primary focal segmental glomerulosclerosis (FSGS) is a disease of the podocytes and glomerulus, leading to nephrotic syndrome and progressive loss of renal function. One of the most serious aspects is its recurrence of disease in over 30% of patients following allogeneic kidney transplantation, leading to early graft loss. This research investigates the individual genetic predispositions and differences in the immune responses leading to recurrence of FSGS after transplantation.

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Introduction: Disturbances in potassium levels can induce ventricular arrhythmias and heighten mortality in patients with ST-elevation myocardial infarction (STEMI). This study evaluates the influence of sK levels on seven-day mortality and incidence of ventricular arrhythmias in STEMI patients to further improve clinical guidelines and outcomes.

Methods: This retrospective, propensity-matched study analyzed approximately 250,000 acute STEMI patients from 55 major academic medical centers/healthcare organizations (HCOs) in the US Collaborative Network of the TriNetX database.

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Introduction: The oral health status of older adults in the United States is a public health crisis and a silent epidemic. Maine's Oral Team-Based Initiative Vital Access to Education (MOTIVATE) Program is an innovative interprofessional oral health program aimed at enhancing oral health education and practice of interprofessional health care teams in nursing homes. Using a blended learning model, a combination of in-person and online learning, this program provides a foundation from which to implement evidenced based oral care in nursing homes.

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Medical school curricula across the United States fail to adequately prepare students to provide high-quality care to and advocate for patients with disabilities. To address this shortcoming at one large, urban medical school, the Curriculum Committee at Sidney Kimmel Medical College formed a taskforce of students and faculty to evaluate the degree and quality of disability representation in its undergraduate medical education curriculum. Taskforce members solicited input from five community members in various fields of disability advocacy to craft recommendations that reflected this community's vision for disability education in undergraduate medical education.

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The Alberta reconstructive technique (ART) is an innovative surgical procedure performed on patients undergoing primary jaw resection and reconstruction. The ART procedure was developed in collaboration with the Institute for Reconstructive Sciences in Medicine and the Division of Otolaryngology-Head and Neck Surgery, University of Alberta.

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Honey bees are globally important pollinators, key to many aspects of ecosystem function and agricultural production. However they are facing an increasing array of stress factors. These stressors include exposure to pathogens and pesticides, agricultural intensification, and changes in climate, and likely contribute to colony dysfunction and colony losses.

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Pseudomonas putida KT2440 is an important bioplastic-producing industrial microorganism capable of synthesizing the polymeric carbon-rich storage material, polyhydroxyalkanoate (PHA). PHA is sequestered in discrete PHA granules, or carbonosomes, and accumulates under conditions of stress, for example, low levels of available nitrogen. The pha locus responsible for PHA metabolism encodes both anabolic and catabolic enzymes, a transcription factor, and carbonosome-localized proteins termed phasins.

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Bacterial contamination of karst groundwater is a major concern for public health. Artificial tracing studies are crucial for establishing links between locations where pollutants can rapidly reach the aquifer systems and subsequent receptors, as well as for enhanced understanding of pollutant transport. However, widely used solute artificial tracers do not always move through the subsurface in the same manner as particles and microorganisms, hence may not be ideal proxies for predicting movement of bacterial contaminants.

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Article Synopsis
  • The study projects premature mortality rates in Australia until 2044, revealing a significant decrease in age-standardized rates but an increase in total premature deaths due to an aging population.
  • It found a 44.4% decrease in rates from 1990-1994 to 2015-2019, with predictions of a 12.7% further decline by 2044, yet total deaths are expected to rise from 272,815 to 334,894.
  • Cancer is forecasted to remain the leading cause of premature deaths, emphasizing the need for targeted public health strategies in Australia.
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. To combat the motion artifacts present in traditional 4D-CBCT reconstruction, an iterative technique known as the motion-compensated simultaneous algebraic reconstruction technique (MC-SART) was previously developed. MC-SART employs a 4D-CBCT reconstruction to obtain an initial model, which suffers from a lack of sufficient projections in each bin.

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Purpose/objective: Field size limitations on Halcyon and Ethos treatment machines largely preclude use of the conventional monoisocentric three-field technique for breast/chest wall and regional lymph nodes. We present an alternative, IMRT-based planning approach that facilitates treatment on Halcyon and Ethos while preserving plan quality.

Materials/methods: Eight breast and regional node cases (four left-sided, four right-sided) were planned for an Ethos machine using a 15-17 field IMRT technique.

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  • The skeletal dysplasias are a diverse group of genetic conditions impacting bone and cartilage growth, but the role of cytokines in these disorders is not well understood.
  • A study analyzed cytokine levels in 136 children with skeletal dysplasia compared to 275 healthy controls, focusing on 12 specific cytokines across various dysplasia types.
  • Findings revealed significant differences in cytokine expression, with certain cytokines consistently elevated or decreased across all dysplasia cohorts, highlighting particularly high levels in MOPDII cases.
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Aim: To assess population-level characteristics and post-metastasis survival of people with recurrent metastatic breast cancer (rMBC) during a period when new publicly-subsidised adjuvant and metastatic systemic therapies became available.

Methods: Record linkage study of females in NSW Cancer Registry (NSWCR) diagnosed with non-metastatic breast cancer (BC) in 2001-2002 (C1) and 2006-2007 (C2). We identified first rMBC from NSWCR, administrative hospital records, dispensed medicines and radiotherapy services (2001-2016).

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Background: We investigated differences in cumulative incidence of first distant recurrence (DR) following non-metastatic breast cancer over a time period when new adjuvant therapies became available in Australia.

Methods: We conducted a health record linkage study of females with localized (T1-3N0) or regional (T4 or N+) breast cancer in the New South Wales Cancer Registry in 2001 to 2002 and 2006 to 2007. We linked cancer registry records with administrative records from hospitals, dispensed medicines, radiotherapy services, and death registrations to estimate the 9-year cumulative incidence of DR and describe use of adjuvant treatment.

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Identifying the origin of faecal pollution in water is needed for effective water management decisions to protect both human health and aquatic ecosystems. Traditionally used indicators of faecal contamination, such as E. coli, only indicate pollution from warm-blooded animals and not the specific source of contamination; hence, more source specific tracers are required.

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Purpose: Recent advancements in obtaining image-based biomarkers from CT images have enabled lung function characterization, which could aid in lung interventional planning. However, the regional heterogeneity in these biomarkers has not been well documented, yet it is critical to several procedures for lung cancer and COPD. The purpose of this paper is to analyze the interlobar and intralobar heterogeneity of tissue elasticity and study their relationship with COPD severity.

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Guidelines for prostate specific antigen (PSA) testing in Australia recommend that men at average risk of prostate cancer who have been informed of the benefits and harms, and who decide to undergo regular testing, should be offered testing every 2 years from 50 to 69 years. This study aimed to estimate the benefits and harms of regular testing in this context. We constructed Policy1-Prostate, a discrete event microsimulation platform of the natural history of prostate cancer and prostate cancer survival, and PSA testing patterns and subsequent management in Australia.

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