Publications by authors named "Lisa Cosimi"

Background: Long-acting injectable antiretrovirals (LAI-ARVs) for HIV prevention and treatment have been demonstrated in clinical trials to be non-inferior to daily oral medications, providing an additional option to help users overcome the challenges of daily adherence. Approval and implementation of these regimens in low- and middle-income settings have been limited.

Method: This study describes the anticipated barriers and facilitators to implementing LAI-ARVs in Vietnam to inform future roll-out.

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Strong primary health care (PHC) systems require a robust PHC workforce. Traditionally, medical education takes place in academic medical centres that favour subspecialty care rather than PHC settings. This may undervalue primary care as a career and contribute to a shortage of PHC workers.

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Background: Unbiased assessment of the risks associated with acquisition of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is critical to informing mitigation efforts during pandemics. The objective of our study was to understand the risk factors for acquiring coronavirus disease 2019 (COVID-19) in a large prospective cohort of adult residents in a large US metropolitan area.

Methods: We designed a fully remote longitudinal cohort study involving monthly at-home SARS-CoV-2 polymerase chain reaction (PCR) and serology self-testing and monthly surveys.

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Purpose Of Review: This review summarizes technology-based interventions for HIV in low- and middle-income countries (LMICs). We highlight potential benefits and challenges to using telehealth in LMICs and propose areas for future study.

Recent Findings: We identified several models for using telehealth to expand HIV health care access in LMICs, including telemedicine visits for pre-exposure prophylaxis (PrEP) and antiretroviral therapy (ART) services, telementoring programs for providers, and virtual peer-support groups.

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This cohort study assesses the duration of symptoms and association with positive rapid antigen test results after SARS-CoV-2 infection.

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Introduction: Stigma and discrimination are important barriers to HIV epidemic control. We implemented a multi-pronged facility-level intervention to reduce stigma and discrimination at health facilities across three high-burden provinces. Key components of the intervention included measurement of stigma, data review and use, participatory training of healthcare workers (HCWs), and engagement of people living with HIV and key populations in all stigma reduction activities.

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Longitudinal clinical studies traditionally require in-person study visits which are well documented to pose barriers to participation and contribute challenges to enrolling representative samples. Remote trial models may reduce barriers to research engagement, improve retention, and reach a more representative cohort. As remote trials become more common following the COVID-19 pandemic, a critical evaluation of this approach is imperative to optimize this paradigm shift in research.

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Background: Carbapenem-resistant Enterobacterales (CRE) are an urgent global health threat. Inferring the dynamics of local CRE dissemination is currently limited by our inability to confidently trace the spread of resistance determinants to unrelated bacterial hosts. Whole-genome sequence comparison is useful for identifying CRE clonal transmission and outbreaks, but high-frequency horizontal gene transfer (HGT) of carbapenem resistance genes and subsequent genome rearrangement complicate tracing the local persistence and mobilization of these genes across organisms.

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Article Synopsis
  • SARS-CoV-2 infection results in varying immune responses, with neutralizing antibodies generally protecting against reinfection.
  • The study investigated mild cases linked to a single event, revealing sex-specific differences in T cell responses and their correlation with antibody levels, particularly in males.
  • Additionally, single-cell immunoprofiling indicated variations in type I IFN signaling that may influence antibody production, emphasizing the importance of sex-based factors in immune responses to SARS-CoV-2.
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Importance: Unbiased assessment of risks associated with acquisition of SARS-CoV-2 is critical to informing mitigation efforts during pandemics.

Objective: Understand risk factors for acquiring COVID-19 in a large, prospective cohort of adult residents recruited to be representative of a large US metropolitan area.

Design: Fully remote longitudinal cohort study launched in October 2020 and ongoing; Study data reported through June 15, 2021.

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Article Synopsis
  • * The researchers used published datasets to show that the gene expression linked to MS1 is present in severe COVID-19 cases and can be replicated in lab models using healthy hematopoietic stem cells.
  • * They found that cytokines IL-6 and IL-10 in patient plasma promote the development of myeloid cells and are essential for activating the MS1 gene program, indicating a role for these cytokines in immune responses during severe infections.
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Monoclonal antibodies (mAbs) are a focus in vaccine and therapeutic design to counteract severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and its variants. Here, we combined B cell sorting with single-cell VDJ and RNA sequencing (RNA-seq) and mAb structures to characterize B cell responses against SARS-CoV-2. We show that the SARS-CoV-2-specific B cell repertoire consists of transcriptionally distinct B cell populations with cells producing potently neutralizing antibodies (nAbs) localized in two clusters that resemble memory and activated B cells.

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  • This study examines the pathophysiology of COVID-19 by analyzing single-cell and spatial atlases from various organ autopsy samples of individuals who died from the virus.
  • Findings revealed significant changes in lung tissue, including impaired tissue regeneration and inflammation, indicating how SARS-CoV-2 affects different cell types.
  • The research provides crucial insights into the biological impact of severe COVID-19, aiding in the development of potential new treatments.
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  • The SARS-CoV-2 pandemic has led to over 1 million deaths worldwide, primarily due to severe lung injuries and multiple organ failures, but there is limited understanding of the immune responses involved in COVID-19.
  • Researchers collected and analyzed over 420 tissue samples from various organs of 17 COVID-19 victims, utilizing advanced techniques like RNA sequencing to map out cellular changes related to their illness.
  • Significant findings include alterations in lung tissue cell types, such as the increase of specific progenitor cells and myofibroblasts, indicating impaired tissue repair and failed regenerative processes in severely damaged lungs.
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Article Synopsis
  • * An expanded state of CD14+ monocytes (MS1) linked to poor outcomes in sepsis and COVID-19 was identified, suggesting a potential role in disease prognosis.
  • * The research shows that severe infections trigger systemic cytokines (IL-6 and IL-10) that lead to the expansion of immunosuppressive MS1 cells, indicating their importance in understanding and managing sepsis.
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  • An amendment to the original paper has been released.
  • The amendment contains updates or corrections to the original content.
  • You can find the link to access this amendment at the top of the paper.
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Development of a robust technical assistance system is an essential component of a sustainable HIV response. Vietnam's National HIV Program is transitioning from a largely donor-funded programme to one primarily supported by domestic resources. Telehealth interventions are increasingly being used for training, mentoring and expert consultation in high-resource settings and hold significant potential for use as a tool to build HIV health worker capacity in low and middle-income countries.

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Article Synopsis
  • * The study reveals the evolutionary adaptability of K. pneumoniae, showing that it can switch between two infection strategies through mutations that either enhance or reduce capsule production, impacting its virulence.
  • * Hypercapsule mutants are linked to serious bloodstream infections, while capsule-deficient mutants thrive in urinary tract infections, contributing to drug-tolerant, persistent infections that are difficult to treat.
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Multidrug resistant organisms are a serious threat to human health. Fast, accurate antibiotic susceptibility testing (AST) is a critical need in addressing escalating antibiotic resistance, since delays in identifying multidrug resistant organisms increase mortality and use of broad-spectrum antibiotics, further selecting for resistant organisms. Yet current growth-based AST assays, such as broth microdilution, require several days before informing key clinical decisions.

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  • Researchers tackled the issue of quickly identifying bacterial pathogens in infectious diseases by creating a new molecular method that uses ribosomal RNA for rapid detection without needing complicated amplification processes.
  • The developed assay demonstrated over 89% accuracy in identifying specific bacterial species and 100% accuracy at the family level from a diverse group of 117 bacterial isolates.
  • Initial tests using clinical samples like sputum and blood cultures effectively identified bacteria from five different phyla, showcasing its practical application in real-world situations.
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Enteroviruses cause a wide spectrum of clinical disease. In this study, we describe the case of a young man with orchitis and aseptic meningitis who was diagnosed with enterovirus infection. Using unbiased "metagenomic" massively parallel sequencing, we assembled a near-complete viral genome, the first use of this method for full-genome viral sequencing from cerebrospinal fluid.

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Carbapenem-resistant Enterobacteriaceae (CRE) are among the most severe threats to the antibiotic era. Multiple different species can exhibit resistance due to many different mechanisms, and many different mobile elements are capable of transferring resistance between lineages. We prospectively sampled CRE from hospitalized patients from three Boston-area hospitals, together with a collection of CRE from a single California hospital, to define the frequency and characteristics of outbreaks and determine whether there is evidence for transfer of strains within and between hospitals and the frequency with which resistance is transferred between lineages or species.

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Background: The global scale-up of antiretroviral therapy included extensive training and onsite support to build the capacity of HIV health care workers. However, traditional efforts aimed at strengthening knowledge and skills often are not successful at improving gaps in the key health systems required for sustaining high quality care.

Methods: We trained and mentored existing staff of the Son La provincial health department and provincial HIV clinic to work as a provincial coaching team (PCT) to provide integrated coaching in clinical HIV skills and quality improvement (QI) to the HIV clinics in the province.

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We describe the results of a study to determine the prevalence and characteristics of cytomegalovirus (CMV) retinitis among HIV-infected patients in Vietnam. We conducted a cross-sectional prospective study of patients with CD4 lymphocyte count ≤100 cells/mm(3)recruited from public HIV clinics. The diagnosis was made by a trained ophthalmologist using slit lamp biomicroscopy and corroborated on fundus photography.

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As HIV prevention and treatment efforts expand around the globe, local capacity-building to update and maintain nurses' HIV competence is essential. The purpose of this project was to develop and sustain a national network of nurse-trainers who could provide ongoing HIV continuing education and training experiences to Vietnamese nurses. Over the course of 6 years, 87 nurses received training to become HIV trainers; their HIV knowledge increased significantly (p = .

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