Publications by authors named "Emerson P"

Article Synopsis
  • Trachoma is aimed for global elimination by 2030, with a focus on using IgG antibody measurements in children for monitoring and decision-making in public health programs.
  • There are no existing guidelines for using serology in trachoma control, highlighting a larger issue in the field of disease elimination and epidemiology.
  • Researchers analyzed IgG levels in 63,911 children from various regions to determine seroconversion rates and proposed a method to assess when population transmission falls below or exceeds intervention thresholds, aiding trachoma program strategies.
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  • Cardiac amyloidosis (CA) is often overlooked as a cause of heart failure and involves left atrial (LA) myopathy, which worsens prognosis and is linked to atrial fibrillation (AF).
  • This study evaluated the echocardiographic features of LA myopathy in patients with transthyretin (ATTR) and light-chain (AL) CA compared to those with hypertensive heart disease (HHT).
  • Findings showed that both ATTR and AL patients had significant heart function impairments, particularly in LA-MD, which was associated with a higher risk of mortality, highlighting the importance of LA evaluations in CA prognosis.
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  • Soil-transmitted helminth (STH) infections, particularly affecting Ugandan schoolchildren, have been targeted by biannual deworming efforts since 2003, yet little long-term impact data exists.
  • A recent study in November 2023 surveyed 10-14-year-olds in five districts, revealing varying prevalence rates of STH, with the highest at 21.2% in Kamwenge and much lower rates elsewhere.
  • Findings indicated that while infections are present, moderate-to-heavy cases are rare across all districts, suggesting effective control of serious STH-related morbidity among schoolchildren.
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Background: Ischaemic stroke remains one of the leading causes of death and disability worldwide. The population of Western Sydney has a unique demographic with lower socioeconomic status and a culturally and linguistically diverse population. This study aims to investigate the demographics and cardiovascular risk factors of patients in Western Sydney, focusing on the prevalence and profile of cardioembolic (CE) strokes and embolic strokes of undetermined source (ESUS).

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Background: Trachoma causes blindness due to repeated conjunctival infection by Chlamydia trachomatis (Ct). Transmission intensity is estimated, for programmatic decision-making, by prevalence of the clinical sign trachomatous inflammation-follicular (TF) in children aged 1-9 years. Research into complementary indicators to field-graded TF includes work on conjunctival photography, tests for ocular Ct infection, and serology.

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Management of urethral sounding related injuries continues to be a challenge due to the wide breath of objects implicated, the rarity of cases, and chance of significant complication. We present a particularly challenging and novel case where a patient inserted a round of live ammunition into his urethra. Non-surgical removal was limited over concern for accidental discharge of the round, and the patient was taken to the operating room where open removal was performed.

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Objective: We aimed to describe the characteristics, outcomes and resource utilisation of patients being cared for in an ICU after undergoing elective surgery in Australia and New Zealand (ANZ).

Methods: This was a point prevalence study involving 51 adult ICUs in ANZ in June 2021. Patients met inclusion criteria if they were being treated in a participating ICU on he study dates.

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Assessing the feasibility of 2030 as a target date for global elimination of trachoma, and identification of districts that may require enhanced treatment to meet World Health Organization (WHO) elimination criteria by this date are key challenges in operational planning for trachoma programmes. Here we address these challenges by prospectively evaluating forecasting models of trachomatous inflammation-follicular (TF) prevalence, leveraging ensemble-based approaches. Seven candidate probabilistic models were developed to forecast district-wise TF prevalence in 11 760 districts, trained using district-level data on the population prevalence of TF in children aged 1-9 years from 2004 to 2022.

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Purpose: Population-based prevalence surveys are essential for decision-making on interventions to achieve trachoma elimination as a public health problem. This paper outlines the methodologies of Tropical Data, which supports work to undertake those surveys.

Methods: Tropical Data is a consortium of partners that supports health ministries worldwide to conduct globally standardised prevalence surveys that conform to World Health Organization recommendations.

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Of the total intensive care unit (ICU) admissions in Australia and New Zealand, 36.6% occur following an elective surgical procedure. How best to use ICU services in this setting is not clear, despite this being an expensive and resource-intensive method of care delivery.

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Background: Hypertension is a cardiovascular risk factor that predisposes to cardiac structural alterations namely increased left ventricular (LV) wall thickness, reduced LV compliance and diastolic dysfunction, with consequent left atrial (LA) dilation and functional impairment. In this article, we evaluated differences in left atrial structure and function using two-dimensional speckle tracking echocardiography in patients with hypertension compared with controls.

Methods: This was a retrospective cross-sectional study of 208 hypertensive patients and 157 controls who underwent a comprehensive transthoracic echocardiogram.

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Article Synopsis
  • - In Bangladesh, a preventive chemotherapy program for soil-transmitted helminth (STH) infections in school-age children has been in effect since 2008, aiming to reduce infection rates through targeted treatment and evaluation of its geographical spread and risk factors from 2017 to 2020.
  • - Researchers used advanced Bayesian geostatistical models to analyze STH prevalence data across various districts, taking into account multiple predictors and estimating treatment needs based on a gridded population dataset, resulting in specific antimicrobial dosage requirements for different risk groups.
  • - The study found varying prevalence rates for specific STH species and highlighted significant associations with household sanitation and environmental factors, estimating that approximately 30.5 million treatment doses are needed yearly for Bangl
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Aims: With improved diagnosis and treatments, a greater percentage of breast cancer patients are achieving long-term survival. Consequently, long-term cardiotoxicity secondary to chemotherapy has become more prevalent, warranting improved cardiac surveillance. We evaluated changes in left atrial (LA) strain in breast cancer patients immediately post anthracycline (AC) therapy to assess its utility as a marker of diastolic dysfunction.

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Background: Soil-transmitted helminth (STH) infections are caused by roundworms (Ascaris lumbricoides), whipworms (Trichuris trichiura), and hookworms (Necator americanus and Ancylostoma duodenale). In Uganda, baseline surveys conducted during the late 1990s and early 2000s suggested STH infections were common, with prevalence >50% among surveyed schoolchildren. In 2003, a national program was launched with mass preventative chemotherapy (PC) and health education for children 1-14 years old.

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Coronavirus (COVID-19) infections have spread rapidly worldwide and posed an immense public health problem. COVID-19 infection can affect the cardiovascular system both acutely and in patients followed up some period after COVID-19 infection. The aim of this study was to evaluate left ventricular (LV) and right ventricular (RV) function by echocardiography in COVID-19 recovered patients (hospitalized and non-hospitalized).

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Neonatal hypoxic-ischemic (HI) injury leads to deficits in hippocampal parvalbumin (PV) interneurons (INs) and working memory. Therapeutic hypothermia (TH) does not prevent these deficits. ErbB4 supports maturation and maintenance of PV IN.

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Background: Mass administration of azithromycin is an established strategy for decreasing the prevalence of trachoma in endemic areas. However, nearby untreated communities could serve as a reservoir that may increase the chances of chlamydia reinfection in treated communities.

Methods: As part of a cluster-randomized trial in Ethiopia, 60 communities were randomized to receive mass azithromycin distributions and 12 communities were randomized to no treatments until after the first year.

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Background: To facilitate mass distribution of azithromycin, trachoma control programmes use height instead of weight to determine dose for children 6 months to 15 years old. WHO has recommended azithromycin distribution to children 1-11 months old to reduce mortality in high mortality settings under carefully monitored conditions. Weight was used to determine dose in children 1-5 months old in studies of azithromycin distribution for child survival, but a simplified approach using age or height for all aged 1-11 months old could increase programme efficiency in real-world settings.

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Background: Preventive chemotherapy (PC) is a central strategy for control and elimination of neglected tropical diseases (NTDs). Increased emphasis has been given to "integration" of NTD programs within health systems and coadministration of NTD drugs offers significant programmatic benefits. Guidance from the World Health Organization (WHO) reflects current evidence for safe drug coadministration and highlights measures to prevent choking of young children during PC.

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Background: Great progress has been made toward the elimination of trachoma as a public-health problem. Mathematical and statistical models have been used to forecast when the program will attain the goal of the elimination of active trachoma, defined as prevalence of trachomatous inflammation-follicular in 1-9 year olds (TF1-9) <5%. Here we use program data to create an empirical model predicting the year of attaining global elimination of TF1-9.

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Background: Global elimination of trachoma as a public health problem was targeted for 2020. We reviewed progress towards the elimination of active trachoma by country and geographical group.

Methods: In this retrospective analysis of national survey and implementation data, all countries ever known to be endemic for trachoma that had either implemented at least one trachoma impact survey shown in the publicly available Trachoma Atlas, or are in Africa were invited to participate in this study.

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We report a draft genome sequence of a previously undescribed calicivirus from a single brown bullhead inhabiting Lake Memphremagog, Vermont/Quebec. The genome is 7,413 nucleotides long and is most similar to the Atlantic salmon calicivirus (nucleotide identity; 64.7%).

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Background: Bone marrow transplantation (BMT) has significantly improved survival rates in various hematological malignancies. However, this has led to an increased prevalence of long-term cardiotoxicity, particularly in those with prior anthracycline (AC) therapy.

Objectives: To evaluate changes in left atrial (LA) volume and function, including LA strain, in BMT patients with prior AC exposure and evaluate its utility as a marker of diastolic dysfunction.

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