Publications by authors named "Meis J"

Invasive mucormycosis is an aggressive fungal infection characterized by rapid progression, primarily impacting immunocompromised individuals. Herein, we report a case of splenic infarction in association with gastrointestinal fistula and brain abscess as a rare presentation of mucormycosis biopsy, proven in a 56-year-old patient diagnosed with acute myeloid leukemia. The patient initially sought medical attention with a 3-week history of fever, night sweats, and malaise.

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Mucormycosis is a rare, severe fungal infection mainly affecting immunocompromised individuals. Because of limited data on its epidemiology in Oman, we present this national, multicentric, retrospective review that includes all cases of proven mucormycosis between 2006 and 2022 in Oman. There were 51 cases of mucormycosis reported in Oman.

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Candida auris is a growing concern due to its resistance to antifungal drugs, particularly amphotericin B (AMB), detected in 30 to 60% of clinical isolates. However, the mechanisms of AMB resistance remain poorly understood. Here we investigated 441 in vitro- and in vivo-evolved C.

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Objectives: Worldwide emergence of clonal outbreaks caused by fluconazole-resistant (FLCR) and the recent emergence of echinocandin- and multidrug-resistant (ECR and MDR) Candida parapsilosis isolates pose serious threats to modern clinics. Conducting large-scale epidemiological studies aimed at determining the genetic composition and antifungal resistance rates is necessary to devise antifungal stewardship and infection control strategies at international, national and local levels. Despite being severely hit by outbreaks due to FLCR C.

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Objective: To describe an outbreak due to Candida vulturna, a newly emerging Candida species belonging to the Candida haemulonii species complex in the Metschnikowiaceae family.

Methods: In this retrospective cohort study we genotyped 14 C. vulturna bloodstream isolates, occurring in a 4-month-period in paediatric cancer patients in a Brazilian hospital.

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Article Synopsis
  • - After COVID-19 began, there was a significant increase in invasive fungal infections globally, but the specific situation in Greece regarding fungaemias remains unclear.
  • - An ongoing outbreak in a Greek hospital has led to 89 episodes of bloodstream infections over nearly three years, with these episodes occurring in waves linked to previous colonization peaks.
  • - Most fungal isolates were found to be resistant to fluconazole but sensitive to other antifungals, highlighting the importance of infection control and careful use of antifungal treatments to prevent resistance.
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Objectives: Candida tropicalis is a medically important yeast with increasing antifungal resistance, but nosocomial transmission is rarely reported. This study genotyped C. tropicalis isolates from Italian hospitals to uncover potential nosocomial transmission and assess resistance.

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Article Synopsis
  • Recent outbreaks of multidrug-resistant fungi in healthcare settings highlight the need for effective antifungal susceptibility testing (AST) to manage invasive infections.* -
  • The study compared the performance of Etest and broth microdilution-based MICRONAUT-AM-EUCAST assays by testing 121 clinical isolates, revealing significant discrepancies in fluconazole and amphotericin B resistance assessments.* -
  • Findings suggest that MCN-AM underestimates fluconazole resistance, while Etest overestimates amphotericin B resistance, indicating a need for method-specific resistance breakpoints to improve clinical outcomes.*
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Background: In clinical trials, the determination of an adequate sample size is a challenging task, mainly due to the uncertainty about the value of the effect size and nuisance parameters. One method to deal with this uncertainty is a sample size recalculation. Thereby, an interim analysis is performed based on which the sample size for the remaining trial is adapted.

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, an emerging non- multidrug-resistant yeast, has become a significant cause of invasive candidiasis in healthcare settings. So far, data on the metabolites of in different clades are minimal, and no studies have focused on clade V metabolites. Therefore, Gas chromatography-mass spectrometry (GC-MS) was used for the metabolomic profiling of clade I compared with fluconazole-resistant and susceptible in clade V strains.

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Fungal infections pose an increasing threat to public health. New pathogens and changing epidemiology are a pronounced risk for nosocomial outbreaks. To investigate clonal transmission between patients and trace the source, genotyping is required.

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Invasive candidiasis and candidemia remain a significant public health concern. The European Confederation of Medical Mycology (ECMM) conducted three pan-European multicentre studies from 1997 to 2022 to investigate various aspects of invasive Candida infections. These studies revealed shifting trends in Candida species distribution, with an increase of non-albicans Candida species as causative pathogens, increasing rates of antifungal resistance, and persistently high mortality rates.

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Candidemia is a major cause of morbidity and mortality in health care settings, and its epidemiology is changing. In the last two decades, the proportion of non- (NAC) yeasts in candidemia has increased. These yeasts more often display resistance to common antifungals.

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Article Synopsis
  • The study investigates three unusual isolates of the fungal pathogen Candida auris found in Singapore, aiming to determine if they represent a new and distinct clade from the known clades (I-V).
  • Through whole-genome sequencing and antifungal susceptibility testing, researchers found that the isolates were genetically separated from existing clades by a significant number of single nucleotide polymorphisms and had unique genetic characteristics.
  • The findings suggest these isolates are a novel clade, referred to as clade VI, highlighting an emerging public health concern due to their resistance patterns and potential for increased transmission.
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The genus Aspergillus consists of a vast number of medically and environmentally relevant species. Aspergillus species classified in series Versicolores are ubiquitous in the environment and include the opportunistic pathogen Aspergillus sydowii, which is associated with onychomycosis and superficial skin infections. Despite frequent clinical reports of A.

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Introduction: Sacrococcygeal chordomas have high recurrence rates and are challenging to treat.

Methods: In this phase II prospective, randomized, stratified trial, the safety and feasibility of hypofractionated ion radiation therapy were investigated. The primary focus was monitored through the incidence of Grade 3-5 NCI-CTC-AE toxicity.

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Background: Candida auris is an emerging multidrug-resistant yeast, frequently causing outbreaks in health care facilities. The pathogen persistently colonises human skin and inanimate surfaces such as catheters, aiding to its spread. Moreover, colonisation is a risk factor to develop invasive infection.

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Background And Purpose: After surgical resection of brain metastases (BM), radiotherapy (RT) is indicated. Postoperative stereotactic radiosurgery (SRS) reduces the risk of local progression and neurocognitive decline compared to whole brain radiotherapy (WBRT). Aside from the optimal dose and fractionation, little is known about the combination of systemic therapy and postoperative fractionated stereotactic radiotherapy (fSRT), especially regarding tumour control and toxicity.

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Purpose: Rare yeasts species are increasingly reported as causative agents of invasive human infection. Proper identification and antifungal therapy are essential to manage these infections. Candida blankii is one of these emerging pathogens and is known for its reduced susceptibility to multiple antifungals.

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Article Synopsis
  • * The Vitek 2 system showed poor agreement for certain antifungals like 5-flucytosine, fluconazole, and amphotericin B, but achieved moderate to high agreement for echinocandin drugs like micafungin and caspofungin.
  • * Resistance was often misclassified, with the Vitek 2 underestimating fluconazole resistance and overestimating amphotericin B resistance, though using specific Vitek 2 values improved agreement rates
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In this study, we explored the sphingolipid (SL) landscape in Candida auris, which plays pivotal roles in fungal biology and drug susceptibility. The composition of SLs exhibited substantial variations at both the SL class and molecular species levels among clade isolates. Utilizing principal component analysis, we successfully differentiated the five clades based on their SL class composition.

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