Publications by authors named "Desnos-Ollivier M"

Article Synopsis
  • Malassezia spp. are naturally found in various parts of the human body, including the skin and gut, but are challenging to culture, leading to the development of molecular methods like pan-M-qPCR for detection.
  • The study tested this method on 361 clinical samples from different patient groups to assess Malassezia levels, revealing higher quantities in seborrheic dermatitis and burned patients compared to healthy individuals.
  • Results showed that the pan-M-qPCR is effective for quantifying Malassezia, highlighting its higher presence in specific areas of the body and its potential as a valuable tool for studying this fungal genus in human microbiomes.
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Article Synopsis
  • - A new species of yeast called Trichosporon austroamericanum sp. nov. was identified during an epidemiological survey of a kidney transplant recipient from Brazil, based on a urine sample.
  • - The strain was characterized using molecular techniques, specifically the intergenic spacer (IGS1) ribosomal DNA locus, revealing its close relation to Trichosporon inkin but highlighting its uniqueness.
  • - T. austroamericanum can be differentiated from other related Trichosporon species through distinct morphological, physiological, and phylogenetic traits.
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Objectives: We aimed to describe features and outcomes of cryptococcosis among HIV-seronegative individuals in a large surveillance network for cryptococcosis in France.

Methods: We included incident cases of cryptococcosis in HIV-seronegative individuals from 2005 to 2020. We compared patient characteristics, disease presentations, cryptococcal antigen results, and induction antifungal treatments according to underlying disease.

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Among 1107 cryptococcosis cases from the French surveillance network (2005-2020), the proportion of HIV-seronegative individuals has recently surpassed that of HIV-seropositive individuals. We observed marked differences in patient characteristics, disease presentations, cryptococcal antigen results, infecting species, and mortality according to HIV serostatus.

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Hybrid AD strains of the human pathogenic Cryptococcus neoformans species complex have been reported from many parts of the world. However, their origin, diversity, and evolution are incompletely understood. In this study, we analyzed 102 AD hybrid strains representing 21 countries on five continents.

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Objectives: Critically ill patients frequently require continuous renal replacement therapy. Echinocandins are recommended as first-line treatment of candidemia. Preliminary results suggested echinocandin sequestration in a polyacrylonitrile filter.

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Background: Candida haemulonii complex-related species are pathogenic yeasts closely related to Candida auris with intrinsic antifungal resistance, but few epidemiological data are available.

Methodology/principal Findings: We analyzed clinical and demographic characteristics of patients with fungemia due to C. haemulonii complex and related species (C.

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Resistance to fluconazole (FLC), the most widely used antifungal drug, is typically achieved by altering the azole drug target and/or drug efflux pumps. Recent reports have suggested a link between vesicular trafficking and antifungal resistance. Here, we identified novel regulators of extracellular vesicle (EV) biogenesis that impact FLC resistance.

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The French National Reference Center for Invasive Mycoses and Antifungals leads an active and sustained nationwide surveillance program on probable and proven invasive fungal diseases (IFDs) to determine their epidemiology in France. Between 2012 and 2018, a total of 10,886 IFDs were recorded. The incidence increased slightly over time (2.

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Since echinocandins are recommended as first line therapy for invasive candidiasis, detection of resistance, mainly due to alteration in FKS protein, is of main interest. EUCAST AFST recommends testing both MIC of anidulafungin and micafungin, and breakpoints (BPs) have been proposed to detect echinocandin-resistant isolates. We analyzed MIC distribution for all three available echinocandins of 2,787 clinical yeast isolates corresponding to 5 common and 16 rare yeast species, using the standardized EUCAST method for anidulafungin and modified for caspofungin and micafungin (AM3-MIC).

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The Cryptococcus gattii species complex has often been referred to as a primary pathogen due to its high infection frequency among apparently immunocompetent patients. In order to scrutinize the immune status of patients and the lineages of etiologic agents, we analyzed patient histories and the molecular types of etiologic agents from 135 global C. gattii cases.

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Candida auris is an emerging pathogen frequently associated with multidrug resistance and involved in many worldwide outbreaks. We here report the first European imported case in France due to isolate belonging of the South Indian clade I and the importance of prevention measure to avoid fungal spreading.

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Replacement of fluconazole by echinocandins as the first-line therapy for yeast-related fungemia could have an impact on both the mortality rate and the epidemiology of yeast species responsible for candidemia. We analyzed the individual clinical and microbiological data collected through the active surveillance program on yeast fungemia (YEASTS program, 2004-2016, Paris area, France) within 14 University Hospitals. The cohort included 3,092 patients [male:female ratio: 1.

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Article Synopsis
  • Invasive yeast infections are a significant global health concern, with limited antifungal treatment options available, particularly azole medications for invasive candidiasis.
  • A comprehensive analysis of 9,319 clinical yeast isolates from France over 17 years identified antifungal susceptibility patterns, finding varying levels of resistance among different species.
  • The study provides valuable insights into azole susceptibility trends, revealing high susceptibility in some species while highlighting concerning resistance levels in others, and offers data on rare or emerging yeast species.
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Recent outbreaks of (CG) infections in North America have sparked renewed interest in the pathogenic potential of CG, and have underscored notable differences with in terms of geographic distribution, pathogen virulence, and host susceptibility. While cases of CG are increasingly reported in patients with a wide variety of underlying conditions, only very few have been reported in patients with lymphoid neoplasms. Herein, we report a case of autochthonous CG meningitis in a patient receiving ibrutinib for chronic lymphocytic leukemia in France, and review available data on the clinical epidemiology of CG infections in patients with lymphoid neoplasms.

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We report a case of a 50-year-old shepherd hospitalized in intensive care unit for hiatal hernia complicated by an occlusive syndrome. In post-surgery, an acute respiratory distress occurs due to mediastinitis with large pleural effusion. At the laboratory, direct examination of the pleural sample revealed the presence of pseudohyphae.

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Candida auris is an emerging multidrug-resistant yeast that can cause severe infections and spread easily between hospitalized patients, leading to outbreaks in hospital. Here, we report the first four cases of colonization and invasive infection with C. auris reported in the Indian Ocean region.

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is the major causative agent of eumycetoma, a neglected tropical infection characterized by painless subcutaneous lesions, inflammation, and grains draining from multiple sinuses. To study the epidemiology of mycetoma, a robust discriminatory typing technique is needed. We describe the use of a short-tandem-repeat assay (STR) for genotyping of isolates predominantly from Sudan.

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is an atypical fungus responsible for severe respiratory infections, often reported as local outbreaks in immunocompromised patients. Epidemiology of this infection, and transmission risk emphasises the need for developing genotyping techniques. Currently, two methods have emerged: Multilocus Sequence typing (MLST) and microsatellite length polymorphism (MLP).

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Saprochaete clavata is a pathogenic yeast responsible for rare outbreaks involving immunocompromised patients, especially those with hematologic malignancies. During February 2016-December 2017, we diagnosed S. clavata infections in 9 patients (8 with fungemia), including 3 within 1 month, at a cancer center in Marseille, France.

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Eumycetoma (mycotic mycetoma) is the fungal form of mycetoma, a subcutaneous infection occurring in individuals living in endemic areas of the disease. The Sudan is hyperendemic for mycetoma, with the highest incidence being reported from Gezira State, Central Sudan. The present study was conducted at the Gezira Mycetoma Center and aimed to determine the cause of black-grain eumycetoma in the state and describe its epidemiology.

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Unlabelled: Though candidiasis is the most frequent invasive fungal infection, Candida spp. central nervous system (CNS) infections are rare but severe. To further describe clinico-patho-radiological presentations of this entity, we report a retrospective study from January 2005 to December 2018 including patients aged ≥ 28 days with proven or probable CNS candidiasis in France.

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Article Synopsis
  • Trichosporonosis is a rare invasive infection primarily caused by Trichosporon asahii, often seen in patients with blood disorders, and genotyping using IGS1 sequencing has been employed since 2012 to classify isolates due to its geographic specificity.* -
  • The study compared IGS1 and whole genome sequencing (WGS) methods on 54 clinical isolates, revealing that while all isolates were resistant to flucytosine, voriconazole demonstrated the strongest antifungal activity, with a notable mortality rate among affected children.* -
  • Findings indicated that IGS1 sequencing is effective for investigating grouped infections of T. asahii, but WGS is more suitable for analyzing population structure
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has emerged globally as a multidrug-resistant yeast that can spread via nosocomial transmission. An initial phylogenetic study of isolates from Japan, India, Pakistan, South Africa, and Venezuela revealed four populations (clades I, II, III, and IV) corresponding to these geographic regions. Since this description, has been reported in more than 30 additional countries.

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