Publications by authors named "Marie Pierre Hayette"

Bispecific antibody is a new treatment for hematological disease, especially for lymphoma, myeloma and acute lymphoblastic leukemia. This class of treatment presents the same kind of side effect as CAR-T cell which are immune-mediated. Nevertheless, infectious complication remains a major concerns with related mortality.

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Background: Although cutaneous mycoses are a global public health problem, very few data are available in the Democratic Republic of Congo (DRC).

Objectives: This study aimed to describe the retrospective clinical epidemiology of dermatomycosis and their associated risk factors in dermatological consultations in Kinshasa, DRC.

Methods: A retrospective study based on the medical records of patients seen in the departments of dermatology of 2 major hospitals in Kinshasa from March 2000 to August 2023 was carried out.

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Background: Terbinafine resistance in dermatophytes is an increasing problem worldwide. Several outbreaks of terbinafine-resistant dermatophytosis are currently occurring in India and surrounding countries, and these recent years, European countries have also been affected by this issue. Currently, antifungal susceptibility testing of dermatophytes is not routinely performed in clinical laboratories.

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We evaluated the prevalence of serum and meningeal cryptococcosis in asymptomatic outpatients with advanced HIV disease (CD4 < 200 cells/mm3) in a cross-sectional screening context in Kinshasa clinics (DRC). Lumbar puncture (LP) was performed in patients with positive serum cryptococcal antigen (CrAg) test, and Cryptococcus spp. isolated from cerebrospinal fluid (CSF) were identified by MALDI-TOF-MS, and characterized using serotyping-PCR, ITS-sequencing and multilocus sequence typing (MLST).

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  • The 2022 mpox outbreak in Belgium involved extensive genomic analysis, revealing 248 complete monkeypox virus genomes related to the MPXV Clade IIb B.1.
  • Researchers identified at least 79 introduction events of the virus into Belgium, but local transmission remained limited.
  • Tecovirimat showed the strongest in vitro effectiveness against the 2022 MPXV strain, indicating its potential as a treatment option.
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Objectives: The aim of this retrospective study was to collect epidemiological, clinical, laboratory, imaging, management, and follow-up data on cases of alveolar echinococcosis (AE) diagnosed and/or followed up within the Namur Hospital Network (NHN) in order to gather information on the challenges, pitfalls, and overall experience in the diagnosis and treatment of AE.

Methods: EchiNam was a multicenter retrospective study. Patients diagnosed and/or treated for probable or confirmed AE in the NHN between 2002 and 2023 were included in the study.

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Background: Existing data on the prevalence of hepatitis C virus (HCV) genotypes and subtypes in Rwanda need to be strengthened. The aim of this study was to identify HCV genotypes and subtypes among HCV-infected patients, as well as their geographical distribution in Rwanda, and to identify the social and economic factors that could influence HCV epidemiology which would make it possible to target national preventive and management actions for infected patients.

Methods: This study included 560 patients with confirmed chronic HCV infection.

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  • The study focuses on how SARS-CoV-2 evolves within immunocompromised patients, revealing new virus lineages resulting from prolonged infections, particularly the Omicron BF.7 sublineage that lasted over a year.
  • Researchers analyzed eight samples from a single patient, discovering 87 genetic changes, including variants and deletions, indicating significant viral diversity within different parts of the respiratory system.
  • The findings suggest that nasopharyngeal samples alone may not accurately reflect the full range of viral mutations, underlining the complexity of viral evolution in chronic infections.
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  • Misdiagnosis of tenosynovitis often occurs because it's hard to identify and seen as rare, leading to delays in treatment and serious outcomes.
  • The report includes a new case of hand tenosynovitis that illustrates the difficulties in diagnosing and managing this condition.
  • It also offers a detailed summary of existing case reports to highlight tenosynovitis as an increasingly recognized cause of hand pain.
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Onychomycosis (OM) is a widespread infection requiring prolonged treatment with potential side effects. Diagnostic certainty is therefore essential before initiating antifungal therapy. Molecular biology has already shown benefits in reducing the time to diagnosis, providing technical ease, and increasing sensitivity for the respective species that molecular tests can detect.

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Saccharomyces cerevisiae is a yeast used mainly as a probiotic for prevention or treatment of diarrhoea. However, the prevalence of S. cerevisiae fungemia has risen over the past years, notably among patients with predisposing factors.

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Arthropod-borne viral diseases are likely to be affected by the consequences of climate change with an increase in their distribution and intensity. Among these infectious diseases, chikungunya and dengue viruses are two (re)emergent arboviruses transmitted by species mosquitoes and which have recently demonstrated their capacity for rapid expansion. They most often cause mild diseases, but they can both be associated with complications and severe forms.

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Background: Guidelines recommend screening for Neisseria gonorrhoeae and Chlamydia trachomatis at three anatomical sites (urethra, anus, and pharynx) every 3 months (3 × 3) in men who have sex with men (MSM) and transgender women taking HIV pre-exposure prophylaxis (PrEP). We present the first randomised controlled trial to compare the effect of screening versus non-screening for N gonorrhoeae and C trachomatis on the incidence of these infections in MSM and transgender women taking PrEP.

Methods: A multicentre, randomised, controlled trial of 3 × 3 screening for N gonorrhoeae and C trachomatis versus non-screening was done among MSM and transgender women taking PrEP in five HIV reference centers in Belgium.

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  • Human African trypanosomiasis, or sleeping sickness, is caused by the parasite Trypanosoma brucei and transmitted by the tsetse fly, with the study focusing on the effects of the drug suramin on this parasite.
  • The research aims to analyze how suramin alters the metabolism of T. brucei using advanced techniques like liquid chromatography-mass spectrometry and nuclear magnetic resonance spectroscopy, supported by extensive statistical analysis.
  • Results indicate significant metabolic changes in T. brucei after suramin treatment, especially in amino acid and sugar metabolism, with clear distinctions observed between treated and untreated samples through various statistical methods.
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  • VAD-BSI with coagulase-negative staphylococci is a common infection following allogeneic hematopoietic cell transplants, and the standard treatment involves IV vancomycin, which requires hospitalization and carries risks like renal toxicity and antibiotic resistance.
  • At a single center, researchers treated 24 cases of uncomplicated VAD-BSI using oral minocycline as an alternative therapy, especially when IV vancomycin was not feasible or patients opted out of hospitalization.
  • Results showed effective bacteremia clearance using minocycline, highlighting its potential as a safer outpatient treatment option for these infections.
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  • Liposomes are effective drug delivery systems but face challenges in sterilization and industrial production.
  • This study focuses on optimizing a one-step process using supercritical carbon dioxide to produce and sterilize liposomes, identifying key conditions for achieving sterility.
  • The optimal conditions (80 °C, 240 bar, 30 min) resulted in liposomes that meet quality standards for drug delivery, with sizes under 200 nm, appropriate sterility levels, and high drug encapsulation efficiency.
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  • * Researchers used EmsB microsatellite polymorphism to analyze 18 samples from Belgian AE patients, identifying three distinct genetic profiles among these specimens.
  • * Findings suggest Belgian E. multilocularis specimens show genetic diversity and share profiles with red foxes in neighboring regions, but no clear link was found between genetic profiles and geographical location, indicating the need for further research.
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Context: The Democratic Republic of Congo (DRC), one of the most malaria-affected countries worldwide, is a potential hub for global drug-resistant malaria. This study aimed at summarizing and mapping surveys of malaria parasites carrying molecular markers of drug-resistance across the country.

Methods: A systematic mapping review was carried out before July 2023 by searching for relevant articles through seven databases (PubMed, Embase, Scopus, African Journal Online, African Index Medicus, Bioline and Web of Science).

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is an anaerobic spore-forming Gram-positive bacterium. carriage and 16S rDNA profiling were studied in three clinical groups at three different sampling times: inflammatory bowel disease (IBD) patients, infection (CDI) patients and healthcare workers (HCWs). Diversity analysis was realized in the three clinical groups, the positive and negative carriage groups and the three analysis periods.

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In recent years, a global increase in the number of reports of human vibriosis involving non-O1/O139 (NOVC) and other spp. has been observed. In this context, the Belgian National Reference Center for conducted an assessment of the presence of spp.

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Introduction: Here we tested the correlation between minimum inhibitory concentrations (MICs) of major antifungal agents and sequence types (STs) within Cryptococcus neoformans VNI isolates, and explored the ERG11 gene of included strains.

Materials And Methods: We analysed 23 C. neoformans strains categorised into two groups according to the distribution of the ST profile in Kinshasa clinics (Democratic Republic of Congo): major ST [ST93 (n = 15)], and less common STs [ST659 (n = 2), ST5 (n = 2), ST4 (n = 1), ST 53 (n = 1), ST31 (n = 1), and ST69 (n = 1)].

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(1) Background: Many vaccines require higher, additional doses or adjuvants to provide adequate protection for people living with HIV (PLWH). Despite their potential risk of severe coronavirus disease 2019, immunological data remain sparse, and a clear consensus for the best booster strategy is lacking. (2) Methods: Using the data obtained from our previous study assessing prospective T-cell and humoral immune responses before and after administration of a third dose of SARS-CoV-2 vaccine, we assessed the correlations between immune parameters reflecting humoral and cellular immune responses.

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  • The Microsporum canis complex includes three species: M. canis (zoophilic) and two anthropophilic species, M. audouinii and M. ferrugineum, known for causing skin infections in cats and humans.
  • The study utilizes various analyses to understand the evolutionary relationships among these species and their host adaptation processes, revealing 12 different genotypes and specific mating behaviors.
  • Results show that M. canis has greater growth and enzyme activity compared to the anthropophilic strains, indicating healthy adaptability among these fungi, with optimal growth conditions identified at around 28°C and some species developing better at 22°C.
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Introduction: Brain abscess is the most common focal infectious neurological injury. Until the nineteenth century this condition was fatal, however the development of neuroimaging for early diagnosis, neurosurgery and antibiotic therapy in the twentieth century has led to new therapeutic strategies decreasing mortality from 50 % in the 1970s to less than 10 % nowadays. In this context we report a case of brain abscess with a dental origin.

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Mathematical modelling studies have shown that repetitive screening can be used to mitigate SARS-CoV-2 transmission in primary schools while keeping schools open. However, not much is known about how transmission progresses within schools and whether there is a risk of importation to households. During the academic year 2020-2021, a prospective surveillance study using repetitive screening was conducted in a primary school and associated households in Liège (Belgium).

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