23 results on '"Demar, Magalie"'
Search Results
2. Re-Emergence of DENV-3 in French Guiana: Retrospective Analysis of Cases That Circulated in the French Territories of the Americas from the 2000s to the 2023–2024 Outbreak.
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Lagrave, Alisé, Enfissi, Antoine, Tirera, Sourakhata, Demar, Magalie Pierre, Jaonasoa, Jean, Carod, Jean-François, Ramavoson, Tsiriniaina, Succo, Tiphanie, Carvalho, Luisiane, Devos, Sophie, Dorleans, Frédérique, Leon, Lucie, Berlioz-Arthaud, Alain, Musso, Didier, Lavergne, Anne, and Rousset, Dominique
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MOLECULAR epidemiology ,NUCLEOTIDE sequencing ,DENGUE ,ARBOVIRUSES ,TWO thousands (Decade) - Abstract
French Guiana experienced an unprecedented dengue epidemic during 2023–2024. Prior to the 2023–2024 outbreak in French Guiana, DENV-3 had not circulated in an epidemic manner since 2005. We therefore studied retrospectively the strains circulating in the French Territories of the Americas (FTA)—French Guiana, Guadeloupe, and Martinique—from the 2000s to the current epidemic. To this end, DENV-3 samples from the collection of the National Reference Center for Arboviruses in French Guiana (NRCA-FG) were selected and sequenced using next-generation sequencing (NGS) based on Oxford Nanopore Technologies, ONT. Phylogenetic analysis showed that (i) the 97 FTA sequences obtained all belonged to genotype III (GIII); (ii) between the 2000s and 2013, the regional circulation of the GIII American-I lineage was the source of the FTA cases through local extinctions and re-introductions; (iii) multiple introductions of lineages of Asian origin appear to be the source of the 2019–2021 epidemic in Martinique and the 2023–2024 epidemic in French Guiana. Genomic surveillance is a key factor in identifying circulating DENV genotypes, monitoring strain evolution, and identifying import events. [ABSTRACT FROM AUTHOR]
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- 2024
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3. Histoplasmosis in Non-HIV Infected Patients: Another Neglected Infection in French Guiana.
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Aissaoui, Houari, Bourne-Watrin, Morgane, Lemarie, Benoit, Guillot, Genevieve, Aboikoni, Alolia, Chhorn, Piseth, Gaudard, Dana, Hadj-Amara, Ghazi, Manasse, Ricardo, Ouedraogo, Mahamado, Salloum, Charles, Demar, Magalie, Epelboin, Loïc, Kallel, Hatem, Adenis, Antoine, Nacher, Mathieu, Drak Alsibai, Kinan, and Louvel, Dominique
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HISTOPLASMOSIS ,HOSPITAL patients ,DEATH rate ,SEX ratio ,IMMUNOSUPPRESSIVE agents - Abstract
(1) Background: Only a few studies on histoplasmosis in immunocompetent patients have been reported in French Guiana. Therefore, we conducted a detailed clinical description of hospitalized patients suffering with histoplasmosis among non-HIV patients. (2) Methods: This is a single-center, retrospective study conducted at Cayenne Hospital Center between 2008 and 2022. (3) Results: Our cohort was composed of 31 (91%) adults (>18 years of age) and 3 (9%) children, with a sex ratio, M:F, of 1:2. The median age was higher among the women than among the men (70 versus 54 years). The collection of respiratory samples constituted the majority of the performed examinations (38%). Fever (>37 °C) was found in 56% of patients. Surprisingly, the histoplasmosis was disseminated in 82% of patients with an overall case fatality rate of 14.7%. However, immunosuppressive conditions were found in 52% (16/31) of the adult patients, including lymphoid hemopathies, diabetes and immunosuppressive drugs. Conclusions: This disease, though rare and usually considered a mostly benign disease in non-HIV patients, presented a relatively high mortality rate in our cohort. Thus, histoplasmosis should be suspected, screened and investigated as a first line of defense in highly endemic areas, even in immunocompetent and non-HIV patients, especially those with fever or chronic respiratory symptoms. [ABSTRACT FROM AUTHOR]
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- 2024
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4. Meat-Borne-Parasite: A Nanopore-Based Meta-Barcoding Work-Flow for Parasitic Microbiodiversity Assessment in the Wild Fauna of French Guiana.
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Matoute, Adria, Maestri, Simone, Saout, Mona, Laghoe, Laure, Simon, Stéphane, Blanquart, Hélène, Hernandez Martinez, Miguel Angel, and Pierre Demar, Magalie
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- 2024
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5. Chromoblastomycosis in French Guiana: Epidemiology and Practices, 1955–2023.
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Valentin, Julie, Grotta, Geoffrey, Muller, Thibaut, Bourgeois, Pieter, Drak Alsibai, Kinan, Demar, Magalie, Couppie, Pierre, and Blaizot, Romain
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MYCOSES ,EPIDEMIOLOGY ,PARACOCCIDIOIDOMYCOSIS ,TERBINAFINE ,NEGLECTED diseases ,ITRACONAZOLE - Abstract
Chromoblastomycosis (CBM) is a chronic neglected fungal disease, usually met in tropical areas. French Guiana is a South American territory with limited epidemiological data. This retrospective study concerned all patients with CBM proven by at least one paraclinical examination and diagnosed in French Guiana between 1950 and 2023. In total, 23 patients were included, mostly males (87%) of Creole origin, living in the coastal region (87%) and involved in outdoor occupations (74%). Lesions were mostly observed on the lower limbs (78.3%), with a median time to diagnosis of four years. Laboratory tests included positive direct microscopic examinations (78.3%) and mycological cultures (69.6%), identifying 14 cases of Fonsecaea pedrosoi and one case of Exophiala janselmei. Various treatments were employed, including antifungals, surgery and combinations of both. In conclusion, CBM in French Guiana involves a different population than other subcutaneous mycoses such as Lobomycosis or Paracoccidioidomycosis, mostly found in the forest hinterland. Surgery should be recommended for recent and limited lesions. Itraconazole and terbinafine should systematically be proposed, either in monotherapy or in combination with surgery or cryotherapy. [ABSTRACT FROM AUTHOR]
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- 2024
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6. Fungal Density in Lobomycosis in French Guiana: A Proposal for a New Clinico-Histological and Therapeutic Classification.
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Grotta, Geoffrey, Couppie, Pierre, Demar, Magalie, Drak Alsibai, Kinan, and Blaizot, Romain
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NEGLECTED diseases ,GOLD miners ,GOLD mining ,MYCOSES - Abstract
Background: Lobomycosis is a rare cutaneous tropical neglected disease caused by the fungal agent Lacazia loboi, recently renamed Paracoccidioides lobogeorgii. Our objectives were to present all cases of lobomycosis diagnosed in French Guiana, to offer a precise description of their histopathological features and to propose a new clinico-histological prognostic classification. Methods: All cases of lobomycosis diagnosed in French Guiana between 1959 and 2022 were included. We looked for associations between the occurrence of relapses and the clinic-histological form. Results: 31 patients diagnosed with lobomycosis were included. An epidemiological shift was observed in the 2000s as Brazilian patients became the most important ethnic group. Gold mining, forestry and fishing/sailing were reported as professional exposures. New histological features, such as inflammatory "rosettes" formations were described. We describe two clinic-histological patterns: a major form (high fungal density and/or multifocal lesions) and a minor form (low fungal density, unifocal lesions, association with fewer relapses). Conclusions: The changing epidemiology of lobomycosis in French Guiana is characterized by a shift towards Brazilian patients, mostly gold miners. Minor forms should be treated with surgery, major forms with a combination of surgery followed by nultiple drug therapy (MDT) or posaconazole. [ABSTRACT FROM AUTHOR]
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- 2023
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7. Diagnostic and Management of Emphysematous Hepatitis with Emphasis on Biopathology.
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Porez, Déborah, Kallel, Hatem, Dobian, Succes, Gerbert-Ferrendier, Timotée, Nacher, Mathieu, Djossou, Félix, Demar, Magalie, Amroun, Hakim, Zappa, Magaly, and Drak Alsibai, Kinan
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HEPATITIS ,LITERATURE reviews ,KLEBSIELLA pneumoniae ,COMMUNICABLE diseases ,PATHOLOGICAL physiology ,OLANZAPINE - Abstract
Emphysematous hepatitis is a rare infectious disease, which corresponds to the presence of gas in the liver, without collection and after exclusion of vascular origin. This entity belongs to the group of emphysematous infections, whose physiopathology seems to be linked to the presence of unbalanced diabetes and to bacterial fermentation, leading to the production of gas within the liver parenchyma. Very few cases of emphysematous hepatitis have been described in the literature, and most of them had a rapidly fatal course. In this manuscript, we report the case of a 59-year-old man with emphysematous hepatitis due to wild-type Klebsiella pneumoniae that was successfully managed by surgery, and we perform a review of the literature to describe the clinical and biopathological aspects of this rare hepatic disease. Our manuscript underlines the need to perform biological and histopathological sampling to better understand the pathophysiology of this rare entity. The causes and mechanisms of emphysematous hepatitis, which seem to be multiple, lead us to believe that it is a syndrome rather than a simple infectious disease. [ABSTRACT FROM AUTHOR]
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- 2023
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8. Impact of Antibiotic Consumption on the Acquisition of Extended-Spectrum β-Lactamase Producing Enterobacterales Carriage during the COVID-19 Crisis in French Guiana.
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Lontsi Ngoula, Guy, Houcke, Stéphanie, Matheus, Séverine, Nkontcho, Flaubert, Pujo, Jean Marc, Higel, Nicolas, Ba, Absettou, Cook, Fabrice, Gourjault, Cyrille, Mounier, Roman, Nacher, Mathieu, Demar, Magalie, Djossou, Felix, Hommel, Didier, and Kallel, Hatem
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COVID-19 pandemic ,COVID-19 ,ANTIBIOTICS ,CEFOTAXIME ,PROPENSITY score matching - Abstract
(1) Background: During the COVID-19 outbreak, several studies showed an increased prevalence of extended-spectrum β-lactamase producing Enterobacterales (ESBL-PE) carriage in intensive care units (ICUs). Our objective was to assess the impact of antibiotic prescriptions on the acquisition of ESBL-PE in ICUs during the COVID-19 crisis. (2) Methods: We conducted an observational study between 1 April 2020, and 31 December 2021, in the medical-surgical ICU of the Cayenne General Hospital. We defined two periods: Period 1 with routine, empirical antibiotic use, and Period 2 with no systematic empiric antibiotic prescription. (3) Results: ICU-acquired ESBL-PE carriage was 22.8% during Period 1 and 9.4% during Period 2 (p = 0.005). The main isolated ESBL-PE was Klebsiella pneumoniae (84.6% in Period 1 and 58.3% in Period 2). When using a generalized linear model with a Poisson family, exposure to cefotaxime was the only factor independently associated with ESBL-PE acquisition in ICU (p = 0.002, IRR 2.59 (95% IC 1.42–4.75)). The propensity scores matching estimated the increased risk for cefotaxime use to acquire ESBL-PE carriage at 0.096 (95% CI = 0.02–0.17), p = 0.01. (4) Conclusions: Exposure to cefotaxime in patients with severe COVID-19 is strongly associated with the emergence of ESBL-PE in the context of maximal infection control measures. [ABSTRACT FROM AUTHOR]
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- 2023
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9. Symptomatic Chikungunya Virus Infection and Pregnancy Outcomes: A Nested Case-Control Study in French Guiana.
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Basurko, Célia, Hcini, Najeh, Demar, Magalie, Abboud, Philippe, Nacher, Mathieu, Carles, Gabriel, Lambert, Véronique, and Matheus, Séverine
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PREGNANCY outcomes ,CHIKUNGUNYA virus ,VIRUS diseases ,PREGNANT women ,PREGNANCY complications ,FEVER - Abstract
During the Chikungunya epidemic in the Caribbean and Latin America, pregnant women were affected by the virus in French Guiana. The question of the impact of the virus on pregnancy was raised because of the lack of scientific consensus and published data in the region. Thus, during the Chikungunya outbreak in French Guiana, a comparative study was set up using a cohort of pregnant women. The objective was to compare pregnancy and neonatal outcomes between pregnant women with Chikungunya virus (CHIKV) infection and pregnant women without CHIKV. Of 653 mothers included in the cohort, 246 mothers were included in the case-control study: 73 had CHIKV fever during pregnancy and 173 had neither fever nor CHIKV during pregnancy. The study did not observe any severe clinical presentation of CHIKV in the participating women. There were no intensive care unit admissions. In addition, the study showed no significant difference between the two groups with regard to pregnancy complications. However, the results showed a potential excess risk of neonatal ICU admission of the newborn when the maternal infection occurred within 7 days before delivery. These results suggest that special attention should be paid to neonates whose mothers were infected with CHIKV shortly before delivery. [ABSTRACT FROM AUTHOR]
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- 2022
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10. Cytological Spectrum of Pulmonary Histoplasmosis Diagnosed by Bronchoalveolar Lavage: 12 Years of Experience in French Guiana.
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Alsibai, Kinan Drak, Aissaoui, Houari, Adenis, Antoine, Bourne-Watrin, Morgane, Djossou, Felix, Epelboin, Loïc, Blanchet, Denis, Demar, Magalie, Couppié, Pierre, and Nacher, Mathieu
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HISTOPLASMOSIS diagnosis ,BRONCHOALVEOLAR lavage ,HISTOPLASMA capsulatum ,IMMUNOCOMPETENCE ,CYTOLOGY - Abstract
Disseminated histoplasmosis is a major cause of mortality in HIV-infected patients. Rapid and efficient diagnosis of Histoplasma capsulatum is crucial. Cytopathology is available in most hospitals and represents a rapid diagnostic alternative. In this study, we reviewed 12 years of experience to describe the cytology of histoplasmosis diagnosed by bronchoalveolar lavage (BAL) in relation to patient characteristics. BAL-diagnosed pulmonary histoplasmosis concerned 17 patients (14 HIV+). BAL cellularity ranged from 76,000 to 125,000 cells/mL in HIV patients, and 117,000 to 160,000 cells/mL in non-HIV patients. Macrophages predominated in all HIV patients (from 60% to 88%), lymphocytic infiltrates ranged from 5% to 15%, and neutrophils were very heterogeneous (from 2% to 32%). The number of H. capsulatum at hot spots seemed greater in HIV-infected than in immunocompetent patients (9 to 375 vs. 4 to 10) and were inversely proportional to the CD4 counts. Yeasts were both intracellular and extracellular in 85.7% of the HIV patients. This is the most comprehensive series detailing the cytological aspects of BAL in the diagnosis of H. capsulatum, focusing on the number of yeasts and their clustering pattern. The cytological examination of the Gomori-Grocott-stained BAL allows a reliable diagnosis of histoplasmosis. [ABSTRACT FROM AUTHOR]
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- 2021
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11. Invasive Fungal Infections in Persons Living with HIV in an Amazonian Context: French Guiana, 2009–2019.
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Cachera, Laurène, Adenis, Antoine, Guarmit, Basma, Rabier, Sébastien, Couppié, Pierre, Djossou, Felix, Epelboin, Loïc, Melzani, Alessia, Abboud, Philippe, Blanchet, Denis, Demar, Magalie, Alsibai, Kinan Drak, and Nacher, Mathieu
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FUNGAL communities ,MYCOSES ,HIV ,CRYPTOCOCCALES ,HOSPITAL patients - Abstract
Although the burden of histoplasmosis in patients with advanced HIV has been the focus of detailed estimations, knowledge about invasive fungal infections in patients living with HIV in an Amazonian context is somewhat scattered. Our goal was thus to adopt a broader view integrating all invasive fungal infections diagnosed over a decade in French Guiana. All patients hospitalized at Cayenne hospital from 1 January 2009 to 31 December 2018 with a proven diagnosis of invasive fungal infection were included (n = 227). Histoplasmosis was the most common (48.2%), followed by Cryptococcus infection (26.3%), and pneumocystosis (12.5%). For cryptococcal infection, there was a discordance between the actual diagnosis of cryptococcal meningitis n = (26) and the isolated presence of antigen in the serum (n = 46). Among the latter when the information was available (n = 34), 21(65.6%) were treated with antifungals but not coded as cryptococcocosis. Most fungal infections were simultaneous to the discovery of HIV (38%) and were the AIDS-defining event (66%). The proportion of major invasive fungal infections appeared to remain stable over the course of the study, with a clear predominance of documented H. capsulatum infections. Until now, the focus of attention has been histoplasmosis, but such attention should not overshadow other less-studied invasive fungal infections. [ABSTRACT FROM AUTHOR]
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- 2021
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12. Risk Factors for Mortality among HIV-Infected Patients with Disseminated Histoplasmosis.
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Nacher, Mathieu, Alsibai, Kinan Drak, Valdes, Audrey, Blaizot, Romain, Abboud, Philippe, Demar, Magalie, Djossou, Félix, Epelboin, Loïc, Misslin, Caroline, Ntab, Balthazar, Adenis, Antoine, and Couppié, Pierre
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HISTOPLASMOSIS ,SURVIVAL analysis (Biometry) ,SERUM ,CD4 antigen ,BIVARIATE analysis - Abstract
Identifying prognostic factors is important in order to guide the choice of first-line therapy for disseminated histoplasmosis. Our objective was to identify factors associated with death among a cohort of 330 patients compiled over 34 years of clinical practice in French Guiana. Survival analysis was performed with death as the failure event and date of symptom onset as the origin event. Incidence rates were and Cox proportional hazards models were computed. Overall, 330 HIV-infected patients with disseminated histoplasmosis were included in the analysis, with 126 deaths occurring. One-quarter of all patients died within 6 months of the first symptoms. Patients with dyspnea, renal failure, arterial blood pressure <90 mmHG, and a WHO performance score >2 had a greater incidence of death. Bivariate analyses showed that patients with increased LDH, low hemoglobin, low serum protein, low CD4 counts, and low platelets tended to have a greater incidence of death. After adjusting for potential confounders, patients with dyspnea, a WHO performance score >2, serum protein <60 g/L, and hemoglobin <8.9 g/dL had an increased risk of dying. The interaction terms showed that patients treated with liposomal amphotericin B had a marked reduction in death among patients with renal failure; among renal failure patients, the elevation of LDH was associated with a significant risk of death. [ABSTRACT FROM AUTHOR]
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- 2020
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13. Heterogeneity of Clinical Presentations and Paraclinical Explorations to Diagnose Disseminated Histoplasmosis in Patients with Advanced HIV: 34 Years of Experience in French Guiana.
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Nacher, Mathieu, Valdes, Audrey, Adenis, Antoine, Blaizot, Romain, Abboud, Philippe, Demar, Magalie, Djossou, Félix, Epelboin, Loïc, Alsibai, Kinan Drak, Misslin, Caroline, Ntab, Balthazar, and Couppié, Pierre
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HISTOPLASMOSIS ,MULTIPLE correspondence analysis (Statistics) ,EIGENVALUES - Abstract
We aimed to describe the ways patients with disseminated histoplasmosis—a multifaceted and often lethal disease—present themselves and are explored. A retrospective, observational, multicentric study spanned the period between 1 January 1981 and 1 October 2014. Principal component analysis was performed for the sampling sites and for the clinical signs and symptoms. The factor loadings of the principal components were selected for eigenvalues > 1. The most frequent signs and symptoms were an alteration of the WHO general performance status, fever, digestive tract, respiratory signs and symptoms and lymphadenopathies. The most common sites sampled were bone marrow, respiratory tract, blood, lymph node and liver biopsies, with significant variations in the number of sites from which samples were taken to try to identify the pathogen. The principal component analysis clinical signs and symptoms leading to the diagnosis showed four main lines of variation. The factor loadings of the four main components were compatible with four broad types of clinical presentations and four types of exploration strategies. Extracting simple algorithms was difficult, emphasizing the importance of clinical expertise when diagnosis depends on obtaining a sample where Histoplasma can be seen or grown. Histoplasma antigen detection tests will help simplifying the algorithms. [ABSTRACT FROM AUTHOR]
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- 2020
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14. Disseminated Histoplasmosis in HIV-Infected Patients: A Description of 34 Years of Clinical and Therapeutic Practice.
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Nacher, Mathieu, Valdes, Audrey, Adenis, Antoine, Blaizot, Romain, Abboud, Philippe, Demar, Magalie, Djossou, Félix, Epelboin, Loïc, Misslin, Caroline, Ntab, Balthazar, Alsibai, Kinan Drak, and Couppié, Pierre
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HISTOPLASMOSIS ,HIV-positive persons ,THERAPEUTICS ,AMPHOTERICIN B ,DEOXYCHOLIC acid - Abstract
Disseminated histoplasmosis is the main AIDS-defining infection of French Guiana. We aim to describe our therapeutic experience for 349 patients with disseminated histoplasmosis between 1 January 1981 and 10 January 2014 in French Guiana. Survival, delays for treatment initiation, duration of induction therapy, and associated initial treatments are described. The death rate was 14.9 per 100 person-years, with an early drop in survival. Among those who died, >1/3 died within a year of HIV diagnosis, and ¾ of all patients with histoplasmosis had been diagnosed for HIV within a year. As induction treatment, 29% received liposomal amphotericin B, 12.9% received deoxycholate amphotericin B, 54% received itraconazole alone, and 21.8% received liposomal amphotericin B and itraconazole. The median delay between symptoms-onset and hospitalization was 19.5 days (IQR = 5–105). Liposomal amphotericin B or itraconazole was initiated shortly after admission. Treatment initiation was often presumptive for liposomal amphotericin B (27%) and itraconazole (20%). The median duration of liposomal amphotericin B treatment was 7 days (IQR = 5–11 days). The present study shows that ¾ of the patients were profoundly immunocompromised and had been diagnosed for HIV within the past year. Antifungal treatment was often initiated presumptively on admission. Over time there was a significant gradual decline in early death. [ABSTRACT FROM AUTHOR]
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- 2020
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15. Comparison of Disseminated Histoplasmosis with and without Cutaneo-Mucous Lesions in Persons Living with HIV in French Guiana.
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Morote, Sophie, Nacher, Mathieu, Blaizot, Romain, Ntab, Balthazar, Blanchet, Denis, Alsibai, Kinan Drak, Demar, Magalie, Djossou, Félix, Couppié, Pierre, and Adenis, Antoine
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HISTOPLASMOSIS ,IMMUNODEFICIENCY ,HIV-positive persons ,IMMUNOSUPPRESSION - Abstract
Introduction: Histoplasmosis is the main opportunistic infection and cause of death in HIV-infected persons living with HIV in French Guiana and probably in most of Latin America. The objective of the present study was to compare cutaneomucous histoplasmosis to non-cutaneomucous histoplasmosis in French Guiana. Methods: Between 1981 and 2014 AIDS-related disseminated histoplasmosis patients followed in the three hospitals of French Guiana were retrospectively studied. Only proven incident cases of histoplasmosis, either by pathology and/or mycological analysis, were considered. Mucocutaneous histoplasmosis was ascertained by a positive mucosal or cutaneous biopsy. Results: Thirty-one patients had mucocutaneous lesions, and 318 had no mucocutaneous lesions. Patients with cutaneomucous lesions were more likely to have had prior opportunistic infections (35.5%) than those who did not have cutaneomucous lesions (19.5%). They were more likely to be very severely immunocompromised (CD4 count < 50) (90.3% versus 62.8%) and less likely to have digestive signs (32.3% versus 74.1%) and superficial adenopathies (29% versus 50.2%) than those without cutaneomucous lesions. In terms of simple biological examinations, patients with cutaneomucous lesions had fewer signs of cholestasis. The diagnosis was significantly more likely to be performed by direct examination and pathology in those with cutaneomucous lesions than in those without such lesions. On the contrary, patients with cutaneomucous lesions were less likely to be diagnosed by fungal culture than those without cutaneomucous lesions. There was a greater but non-significant risk of early death in those with cutaneomucous lesions relative to those without (OR = 2.28 (95%CI = 0.83–5.7), p = 0.056. Conclusions: Mucocutaneous forms were associated with more profound immunosuppression and perhaps risk of early death. They are easily accessible for diagnosis. [ABSTRACT FROM AUTHOR]
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- 2020
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16. The Broad Clinical Spectrum of Disseminated Histoplasmosis in HIV-Infected Patients: A 30 Years' Experience in French Guiana.
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Couppié, Pierre, Herceg, Katarina, Bourne-Watrin, Morgane, Thomas, Vincent, Blanchet, Denis, Alsibai, Kinan Drak, Louvel, Dominique, Djossou, Felix, Demar, Magalie, Blaizot, Romain, and Adenis, Antoine
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HISTOPLASMOSIS ,HIV-positive persons ,HISTOPLASMA capsulatum ,MEDICAL mycology ,ANTIFUNGAL agents - Abstract
Histoplasmosis is a common but neglected AIDS-defining condition in endemic areas for Histoplasma capsulatum. At the advanced stage of HIV infection, the broad spectrum of clinical features may mimic other frequent opportunistic infections such as tuberculosis and makes it difficult for clinicians to diagnose histoplasmosis in a timely manner. Diagnosis of histoplasmosis is difficult and relies on a high index of clinical suspicion along with access to medical mycology facilities with the capacity to implement conventional diagnostic methods (direct examination and culture) in a biosafety level 3 laboratory as well as indirect diagnostic methods (molecular biology, antibody, and antigen detection tools in tissue and body fluids). Time to initiation of effective antifungals has an impact on the patient's prognosis. The initiation of empirical antifungal treatment should be considered in endemic areas for Histoplasma capsulatum and HIV. Here, we report on 30 years of experience in managing HIV-associated histoplasmosis based on a synthesis of clinical findings in French Guiana with considerations regarding the difficulties in determining its differential diagnosis with other opportunistic infections. [ABSTRACT FROM AUTHOR]
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- 2019
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17. The Fight against HIV-Associated Disseminated Histoplasmosis in the Americas: Unfolding the Different Stories of Four Centers.
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Nacher, Mathieu, Leitao, Terezinha Silva, Gómez, Beatriz L., Couppié, Pierre, Adenis, Antoine, Damasceno, Lisandra, Demar, Magalie, Samayoa, Blanca, Cáceres, Diego H., Pradinaud, Roger, de Queiroz Sousa, Anastacio, Arathoon, Eduardo, and Restrepo, Angela
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HIV ,HISTOPLASMOSIS ,FUNGAL cultures ,LEISHMANIASIS - Abstract
Disseminated histoplasmosis is a major opportunistic infection of HIV-infected patients, killing thousands in Latin America each year. Yet, it remains a neglected disease that is often confused with tuberculosis, for lack of simple, affordable, and rapid diagnostic tools. There is great heterogeneity in the level of histoplasmosis awareness. The purpose of this report was to describe how the historical "awakening" to the threat of histoplasmosis came to be in four different centers that have actively described this disease: In Brazil, the Sao José hospital in Fortaleza; in Colombia, the Corporación para Investigaciones Biológicas inMedellin; in French Guiana, Cayenne Hospital; and in Guatemala, the Association de Salud Integral in Guatemala city. In Brazil and French Guiana, the search for leishmaniasis on the buffy coat or skin smears, respectively, led to the rapid realization that HIV patients were suffering from disseminated histoplasmosis. With time and progress in fungal culture, the magnitude of this problem turned it into a local priority. In Colombia and Guatemala, the story is different because for these mycology centers, it was no surprise to find histoplasmosis in HIV patients. In addition, collaborations with the CDC to evaluate antigen-detection tests resulted in researchers and clinicians developing the capacity to rapidly screen most patients and to demonstrate the very high burden of disease in these countries. While the lack of awareness is still a major problem, it is instructive to review the ways through which different centers became histoplasmosis-aware. Nevertheless, as new rapid diagnostic tools are becoming available, their implementation throughout Latin America should rapidly raise the level of awareness in order to reduce the burden of histoplasmosis deaths. [ABSTRACT FROM AUTHOR]
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- 2019
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18. Characteristics of Snakebite-Related Infection in French Guiana.
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Houcke, Stéphanie, Resiere, Dabor, Lontsingoula, Guy Roger, Cook, Fabrice, Lafouasse, Pierre, Pujo, Jean Marc, Demar, Magalie, Matheus, Severine, Hommel, Didier, and Kallel, Hatem
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NECROTIZING fasciitis ,WOUND infections ,INTENSIVE care units ,INFECTION ,FER-de-lance - Abstract
Wound infection is frequently reported following snakebite (SB). This study is retrospective. It was conducted in the emergency department and the Intensive Care Unit (ICU) of Cayenne General Hospital between 1 January 2016 and 31 July 2021. We included 172 consecutive patients hospitalized for SB envenoming. All patients were monitored for wound infection. Sixty-three patients received antibiotics at admission (36.6%). The main antibiotic used was amoxicillin–clavulanate (92.1%). Wound infection was recorded in 55 cases (32%). It was 19% in grade 1, 35% in grade 2, and 53% in grade 3. It included abscess (69.1%), necrotizing fasciitis (16.4%), and cellulitis (21.8%). The time from SB to wound infection was 6 days (IQR: 3–8). The main isolated microorganisms were A. hydrophila and M. morganii (37.5% and 18.8% of isolated organisms). Surgery was required in 48 patients (28.1%), and a necrosectomy was performed on 16 of them (33.3%). The independent factors associated with snakebite-associated infection were necrosis (p < 0.001, OR 13.15, 95% CI: 4.04–42.84), thrombocytopenia (p = 0.002, OR: 3.37, 95% CI: 1.59–7.16), and rhabdomyolysis (p = 0.046, OR: 2.29, 95% CI: 1.02–5.19). In conclusion, wound infection following SB is frequent, mainly in grade 2 and 3 envenomed patients, especially those with necrosis, thrombocytopenia, and rhabdomyolysis. The main involved bacteria are A. hydrophila and M. morganii. [ABSTRACT FROM AUTHOR]
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- 2022
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19. Investigations upon the Improvement of Dermatophyte Identification Using an Online Mass Spectrometry Application.
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Jabet, Arnaud, Normand, Anne-Cécile, Moreno-Sabater, Alicia, Guillot, Jacques, Risco-Castillo, Veronica, Brun, Sophie, Demar, Magalie, Blaizot, Romain, Nabet, Cécile, Packeu, Ann, and Piarroux, Renaud
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DERMATOPHYTES ,MATRIX-assisted laser desorption-ionization ,FUNGAL phylogeny ,FUNGAL cultures ,GENTAMICIN - Abstract
Online MALDI-TOF mass spectrometry applications, such as MSI-2, have been shown to help identify dermatophytes, but recurrent errors are still observed between phylogenetically close species. The objective of this study was to assess different approaches to reduce the occurrence of such errors by adding new reference spectra to the MSI-2 application. Nine libraries were set up, comprising an increasing number of spectra obtained from reference strains that were submitted to various culture durations on two distinct culture media: Sabouraud gentamicin chloramphenicol medium and IDFP Conidia medium. The final library included spectra from 111 strains of 20 species obtained from cultures on both media collected every three days after the appearance of the colony. The performance of each library was then analyzed using a cross-validation approach. The spectra acquisitions were carried out using a Microflex Bruker spectrometer. Diversifying the references and adding spectra from various culture media and culture durations improved identification performance. The percentage of correct identification at the species level rose from 63.4 to 91.7% when combining all approaches. Nevertheless, residual confusion between close species, such as Trichophyton rubrum, Trichophyton violaceum and Trichophyton soudanense, remained. To distinguish between these species, mass spectrometry identification should take into account basic morphological and/or clinico-epidemiological features. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
20. A Simple Predictive Score to Distinguish between Disseminated Histoplasmosis and Tuberculosis in Patients with HIV.
- Author
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Nacher, Mathieu, Drak Alsibai, Kinan, Epelboin, Loïc, Abboud, Philippe, About, Frédégonde, Demar, Magalie, Djossou, Félix, Blaizot, Romain, Douine, Maylis, Sabbah, Nadia, Vignier, Nicolas, Adriouch, Leila, Lucarelli, Aude, Boutrou, Mathilde, Couppié, Pierre, and Adenis, Antoine
- Subjects
HISTOPLASMOSIS ,TUBERCULOSIS ,HIV-positive persons ,DIFFERENTIAL diagnosis ,PROBABILITY theory - Abstract
Disseminated histoplasmosis is a common differential diagnosis of tuberculosis in disease-endemic areas. We aimed to find a predictive score to orient clinicians towards disseminated histoplasmosis or tuberculosis when facing a non-specific infectious syndrome in patients with advanced HIV disease. We reanalyzed data from a retrospective study in Cayenne Hospital between January 1997–December 2008 comparing disseminated histoplasmosis and tuberculosis: 100 confirmed disseminated histoplasmosis cases and 88 confirmed tuberculosis cases were included. A simple logit regression model was constructed to predict whether a case was tuberculosis or disseminated histoplasmosis. From this model, a score may be obtained, where the natural logarithm of the probability of disseminated histoplasmosis/tuberculosis = +3.917962 × WHO performance score (1 if >2, 0 if ≤2) −1.624642 × Pulmonary presentation (1 yes, 0 no) +2.245819 × Adenopathies > 2 cm (1 yes, 0 no) −0.015898 × CD4 count − 0.001851 × ASAT − 0.000871 × Neutrophil count − 0.000018 × Platelet count + 6.053793. The area under the curve was 98.55%. The sensitivity of the model to distinguish between disseminated histoplasmosis and tuberculosis was 95% (95% CI = 88.7–98.3%), and the specificity was 93% (95% CI = 85.7.3–97.4%). In conclusion, we here present a clinical-biological predictive score, using simple variables available on admission, that seemed to perform very well to discriminate disseminated histoplasmosis from tuberculosis in French Guiana in well characterized patients. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
21. Vitamin D Deficiency in Patients with Diabetes in French Guiana: Epidemiology and Relation with Microvascular and Macrovascular Complications.
- Author
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Girard, Elise, Nacher, Mathieu, Bukasa-Kakamba, John, Fahrasmane, Aniza, Adenis, Antoine, Massicard, Mickael, Drak Alsibai, Kinan, De Toffol, Bertrand, Bekima, Raissa, Thelusme, Liliane, Okambabelle, Diana, Demar, Magalie, Aurelus, Jean M., and Sabbah, Nadia
- Abstract
Vitamin D (VD) insufficiency is common among patients with diabetes in French Guiana. The study aimed to evaluate the prevalence of VD deficiency in the different type of diabetes encountered and to analyze the relationship between VD deficiency and diabetes complications. Methods: An observational study was conducted between May 2019 and May 2020 in French Guiana, based on data from the CODIAM study (Diabetes Cohort in French Amazonia), describing the characteristics of patients with diabetes mellitus. Among 600 patients enrolled with diabetes, 361 had an available VD assay. Results: The mean 25(OH)VD (hydroxycalciferol) level was 27.9 ng/mL. The level of VD was inversely proportional to the HbA1c (glycated hemoglobin) level. Patients with angina pectoris had a greater proportion of deficiencies VD < 20 ng/mL than those without angina. By contrast, patients with retinopathy had higher vitamin D concentrations than those without retinopathy. There was no association between vitamin D and arteriopathy, stroke, nephropathy and polyneuropathy. VD deficiency was more frequent in women, and in patients with a high school education. Conclusion: The prevalence of VD deficiency was high in patients with diabetes in French Guiana, emphasizing the importance of VD supplementation. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
22. Spatio-Temporal Dynamics of Plasmodium falciparum and Plasmodium vivax in French Guiana: 2005–2019.
- Author
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Scully, Jenna, Mosnier, Emilie, Carbunar, Aurel, Roux, Emmanuel, Djossou, Félix, Garçeran, Nicolas, Musset, Lise, Sanna, Alice, Demar, Magalie, Nacher, Mathieu, Gaudart, Jean, and Tchounwou, Paul B.
- Published
- 2021
- Full Text
- View/download PDF
23. Clinical Features and Management of Snakebite Envenoming in French Guiana.
- Author
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Resiere, Dabor, Houcke, Stéphanie, Pujo, Jean Marc, Mayence, Claire, Mathien, Cyrille, NkontCho, Flaubert, Blaise, Nicaise, Demar, Magalie Pierre, Hommel, Didier, and Kallel, Hatem
- Subjects
SNAKEBITES ,INTERNATIONAL normalized ratio ,PARTIAL thromboplastin time ,PROTHROMBIN ,INTENSIVE care units - Abstract
The management of snakebite (SB) envenoming in French Guiana (FG) is based on symptomatic measures and antivenom (AV) administration (Antivipmyn Tri
® ; Instituto Bioclon—Mexico). Our study aimed to assess clinical manifestations, the efficacy, and safety of Antivipmyn Tri® in the management of SB. Our study is a prospective observational work. It was conducted in the Intensive Care Unit (ICU) of Cayenne General Hospital between 1 January 2016 and 31 December 2019. We included all patients hospitalized for SB envenoming. Our study contained three groups (without AV, three vials, and six vials Antivipmyn Tri® ). During the study period, 133 patients were included. The main clinical symptoms were edema (98.5%), pain (97.7%), systemic hemorrhage (18%), blister (14.3%), and local hemorrhage (14.3%). AV was prescribed for 83 patients (62.3%), and 17 of them (20%) developed early adverse reactions. Biological parameters at admission showed defibrinogenation in 124 cases (93.2%), International Normalized Ratio (INR) > 2 in 104 cases (78.2%), and partial thromboplastin time (PTT) > 1.5 in 74 cases (55.6%). The time from SB to AV was 9:00 (5:22–20:40). The median time from SB to achieve a normal dosage of fibrinogen was 47:00 vs. 25:30, that of Factor II was 24:55 vs. 15:10, that of Factor V was 31:42 vs. 19:42, and that of Factor VIII was 21:30 vs. 10:20 in patients without and with AV, respectively, (p < 0.001 for all factors). Patients receiving Antivipmyn Tri® showed a reduction in the time to return to normal clotting tests, as compared to those who did not. We suggest assessing other antivenoms available in the region to compare their efficacy and safety with Antivipmyn Tri® in FG. [ABSTRACT FROM AUTHOR]- Published
- 2020
- Full Text
- View/download PDF
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