Publications by authors named "KnauSS S"

Neurologic immune-related adverse events (nirAEs) represent rare, yet severe side effects associated with immune checkpoint inhibitor (ICI) therapy. Given the absence of established diagnostic biomarkers for nirAEs, we aimed to evaluate the diagnostic utility of serum Neurofilament Light Chain (NfL) and Glial Fibrillary Acidic Protein (GFAP). Fifty-three patients were included at three comprehensive cancer centers, of these 20 patients with manifest nirAEs and 11 patients with irHypophysitis.

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Background: Financial risk protection in health is a key objective of the Sustainable Development Goals. However, financial risk protection mechanisms are limited, especially in low-income countries, such as Madagascar. To design effective financial risk protection mechanisms, solid and reliable data on the costs patients incur when seeking care are essential.

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  • The COVID-19 pandemic led to an increase in digital financial services, but its impact on maternal health services in low-resource settings is not well understood.
  • The study examined the effects of Madagascar's first COVID-19 lockdown on the usage of a mobile maternal health wallet among women, utilizing data from over 800,000 health wallet use instances.
  • Results showed significant declines in savings (58.5%), payments (45.8%), and voucher use (49.6%) during the lockdown, with recovery patterns varying by age, particularly indicating faster recovery for women over 30 years.
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Introduction: Universal health coverage (UHC) is a global priority, ensuring equitable access to quality healthcare services without financial hardship. Many countries face challenges in progressing towards UHC. Health financing is pivotal for advancing UHC by raising revenues, enabling risk-sharing through pooling of funds and allocating resources.

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Context: There is a substantial lack of inter-facility referral systems for emergency obstetrical and neonatal care in rural areas of sub-Saharan Africa. Data on the costs and cost-effectiveness of such systems that reduce preventable maternal and neonatal deaths are scarce.

Setting: We aimed to determine the cost-effectiveness of a non-governmental organisation (NGO)-run inter-facility referral system for emergency obstetrical and neonatal care in rural Southern Madagascar by analysing the characteristics of cases referred through the intervention as well as its costs.

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Sole ulcers, a common cause of lameness is the costliest non-infectious foot lesion in dairy cows and one of the most prevalent non-infectious foot lesions in freestall housing systems. Costs associated with sole ulcers are treatment costs, plus increased labor and decreased productivity and fertility. Routine hoof trimming is part of a strategy to manage sole ulcers.

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  • The rise of cancer immunotherapy, particularly immune checkpoint inhibitors (ICIs), has led to improved survival rates for various cancers, but it also brings significant risks of autoimmunity, including severe neurological side effects.
  • The study focuses on understanding the role of neuronal autoantibodies in ICI-treated patients, exploring their prevalence and potential correlation with adverse neurological effects.
  • This research is the first comprehensive comparison of neuronal autoantibody profiles between ICI-treated cancer patients with and without neurological immune-related adverse events, offering important insights for future clinical and research applications.
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  • There is a significant connection between tuberculosis (TB) and undernutrition, where each condition exacerbates the other, leading to a nutritional support program for TB patients in Madagascar.
  • The study analyzed data from 1,310 TB patients, highlighting the high rates of undernutrition among them, particularly 81.3% of adults and 42.3% of children under five experiencing severe acute malnutrition at the start of treatment.
  • Although the average BMI of adults improved during the program, many still remained undernourished after completing their TB treatment.
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Background: Uncontrolled hypertension is a leading risk factor for cardiovascular diseases. In Uganda, such diseases account for approximately 10% of all deaths, with 1 in 5 adults having hypertension (>90% of the hypertensive cases are uncontrolled). Although basic health care in the country is available free of cost at government facilities, regularly accessing medication to control hypertension is difficult because supply chain challenges impede availability.

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Objectives: To determine the perspective of final-year medical students on the use of computed tomography (CT) in patients with sepsis.

Methods: A total of 207 questionnaires were distributed to final-year medical students at a large university medical center, and 113 returned questionnaires met the criteria for inclusion in the analysis. Questions referred to sepsis guidelines, CT indications, and the use of contrast agents.

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Background: Neurologic immune-related adverse events (irAE-n) are rare but severe toxicities of immune checkpoint inhibitor (ICI) treatment. To overcome diagnostic and therapeutic challenges, a better mechanistic understanding of irAE-n is paramount.

Methods: In this observational cohort study, we collected serum and peripheral blood samples from 34 consecutive cancer patients with irAE-n (during acute illness) and 49 cancer control patients without irAE-n (pre- and on-ICI treatment, n = 44 without high-grade irAEs, n = 5 with high-grade nonneurologic irAEs).

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Background: Prediction of poststroke outcome using the degree of subacute deficit or magnetic resonance imaging is well studied in humans. While mice are the most commonly used animals in preclinical stroke research, systematic analysis of outcome predictors is lacking.

Methods: We intended to incorporate heterogeneity into our retrospective study to broaden the applicability of our findings and prediction tools.

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Background: Neurological immune-related adverse events (irAE-n) are severe and potentially fatal toxicities of immune checkpoint inhibitors (ICI). To date, the clinical significance of neuronal autoantibodies in irAE-n is poorly understood. Here, we characterize neuronal autoantibody profiles in patients with irAE-n and compare these with ICI-treated cancer patients without irAE-n.

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Background: Several sub-Saharan African countries use digital financial services to improve health financing, especially for maternal and child health. In cooperation with the Malagasy Ministry of Health, the NGO Doctors for Madagascar is implementing a mobile health wallet for maternal health care in public-sector health facilities in Madagascar. Our aim was to explore the enabling and limiting factors related to the usability and acceptance of the Mobile Maternal Health Wallet (MMHW) intervention during its implementation.

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Background: Knowledge about factors influencing access and adherence to TB care, and on the impact of the COVID-19 pandemic on TB care in resource-restricted settings is scarce. We conducted this study in Atsimo-Andrefana, a rural region in southern Madagascar where TB prevalence, poverty and food insecurity rates are high. We aimed to determine facilitators and barriers to access to and provision of TB care in rural Madagascar during the COVID-19 pandemic.

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  • Over the past decade, cancer immunotherapy using immune checkpoint inhibitors (ICIs) has improved cancer treatment outcomes but has also led to an increase in neurological immune-related adverse events (irAEs), notably encephalitis.
  • ICI-induced encephalitis (ICI-iE) can be severe, resulting in treatment discontinuation, lasting complications, or even death, yet there is limited data on its clinical characteristics and diagnostic criteria.
  • This study gathered and analyzed 30 cases of ICI-iE alongside cases of anti-LGI1 and HSV-1 encephalitis to identify distinguishing features, aiming to enhance recognition, diagnosis, and management of ICI-iE.
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Background: Like other countries in sub-Saharan Africa, Madagascar has a high burden of stroke. The Malagasy population is unique in sharing both African and Asian ancestry. The proportion of ischemic and hemorrhagic stroke types is unknown for this population.

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Aim: Immune checkpoint inhibitor-induced encephalitis (ICI-iE) is a rare but life-threatening toxicity of immune checkpoint inhibitor treatment. We aim to identify the characteristics of ICI-iE and describe factors that discriminate it from herpes simplex virus (HSV)-1 encephalitis and anti-leucine-rich glioma-inactivated 1 (anti-LGI1) encephalitis, as two alternative entities of encephalitis.

Methods: In this retrospective multicentre cohort study, we collected patients with ICI-iE reported to the Side Effect Registry Immuno-Oncology from January 2015 to September 2021 and compared their clinical features and outcome with 46 consecutive patients with HSV-1 or anti-LGI1 encephalitis who were treated at a German neurological referral centre.

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Objectives: We aimed to determine the rate of catastrophic health expenditure incurred by women using maternal healthcare services at faith-based hospitals in Madagascar.

Design: This was a secondary analysis of programmatic data obtained from a non-governmental organisation.

Setting: Two faith-based, secondary-level hospitals located in rural communities in southern Madagascar.

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Background: Mobile money-a service enabling users to receive, store, and send electronic money using mobile phones-has been widely adopted across low- and middle-income economies to pay for a variety of services, including healthcare. However, evidence on its effects on healthcare access and health outcomes are scarce and the possible implications of using mobile money for financing and payment of maternal healthcare services-which generally require large one-time out-of-pocket payments-have not yet been systematically assessed in low-resource settings. The aim of this study is to determine the impact on health outcomes, cost-effectiveness, feasibility, acceptability, and usefulness of mobile phone-based savings and payment service, the Mobile Maternal Health Wallet (MMHW), for skilled healthcare during pregnancy and delivery among women in Madagascar.

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Background And Purpose: During acute coronavirus disease 2019 (COVID-19) infection, neurological signs, symptoms and complications occur. We aimed to assess their clinical relevance by evaluating real-world data from a multinational registry.

Methods: We analyzed COVID-19 patients from 127 centers, diagnosed between January 2020 and February 2021, and registered in the European multinational LEOSS (Lean European Open Survey on SARS-Infected Patients) registry.

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  • A study assessed the variability in lesion sizes during ischemic stroke experiments using the fMCAo model in C57BL/6 mice, linked to the patency of the posterior communicating artery (PcomA).
  • Measurement of PcomA size 24 hours after stroke was found to correlate negatively with lesion size, explaining 30% of the variability in stroked mice.
  • Implementing this measurement can increase the accuracy in evaluating treatment effects in stroke research by enhancing statistical power.
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Purpose: Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has spread worldwide causing a global health emergency. Pa-COVID-19 aims to provide comprehensive data on clinical course, pathophysiology, immunology and outcome of COVID-19, to identify prognostic biomarkers, clinical scores, and therapeutic targets for improved clinical management and preventive interventions.

Methods: Pa-COVID-19 is a prospective observational cohort study of patients with confirmed SARS-CoV-2 infection treated at Charité - Universitätsmedizin Berlin.

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