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1.
Proc Natl Acad Sci U S A ; 121(14): e2311597121, 2024 Apr 02.
Artigo em Inglês | MEDLINE | ID: mdl-38527199

RESUMO

Warmer temperatures and higher sea level than today characterized the Last Interglacial interval [Pleistocene, 128 to 116 thousand years ago (ka)]. This period is a remarkable deep-time analog for temperature and sea-level conditions as projected for 2100 AD, yet there has been no evidence of fossil assemblages in the equatorial Atlantic. Here, we report foraminifer, metazoan (mollusks, bony fish, bryozoans, decapods, and sharks among others), and plant communities of coastal tropical marine and mangrove affinities, dating precisely from a ca. 130 to 115 ka time interval near the Equator, at Kourou, in French Guiana. These communities include ca. 230 recent species, some being endangered today and/or first recorded as fossils. The hyperdiverse Kourou mollusk assemblage suggests stronger affinities between Guianese and Caribbean coastal waters by the Last Interglacial than today, questioning the structuring role of the Amazon Plume on tropical Western Atlantic communities at the time. Grassland-dominated pollen, phytoliths, and charcoals from younger deposits in the same sections attest to a marine retreat and dryer conditions during the onset of the last glacial (ca. 110 to 50 ka), with a savanna-dominated landscape and episodes of fire. Charcoals from the last millennia suggest human presence in a mosaic of modern-like continental habitats. Our results provide key information about the ecology and biogeography of pristine Pleistocene tropical coastal ecosystems, especially relevant regarding the-widely anthropogenic-ongoing global warming.


Assuntos
Ecossistema , Moluscos , Humanos , Animais , Guiana Francesa , Plantas , Pólen , Fósseis
2.
Malar J ; 23(1): 140, 2024 May 09.
Artigo em Inglês | MEDLINE | ID: mdl-38725027

RESUMO

BACKGROUND: Plasmodium vivax relapses due to dormant liver hypnozoites can be prevented with primaquine. However, the dose must be adjusted in individuals with glucose-6-phosphate-dehydrogenase (G6PD) deficiency. In French Guiana, assessment of G6PD activity is typically delayed until day (D)14 to avoid the risk if misclassification. This study assessed the kinetics of G6PD activity throughout P. vivax infection to inform the timing of treatment. METHODS: For this retrospective monocentric study, data on G6PD activity between D1 and D28 after treatment initiation with chloroquine or artemisinin-based combination therapy were collected for patients followed at Cayenne Hospital, French Guiana, between January 2018 and December 2020. Patients were divided into three groups based on the number of available G6PD activity assessments: (i) at least two measurements during the P. vivax malaria infection; (ii) two measurements: one during the current infection and one previously; (iii) only one measurement during the malaria infection. RESULTS: In total, 210 patients were included (80, 20 and 110 in groups 1, 2 and 3, respectively). Data from group 1 showed that G6PD activity remained stable in each patient over time (D1, D3, D7, D14, D21, D28). None of the patients with normal G6PD activity during the initial phase (D1-D3) of the malaria episode (n = 44) was categorized as G6PD-deficient at D14. Patients with G6PD activity < 80% at D1 or D3 showed normal activity at D14. Sex and reticulocyte count were statistically associated with G6PD activity variation. In the whole sample (n = 210), no patient had severe G6PD deficiency (< 10%) and only three between 10 and 30%, giving a G6PD deficiency prevalence of 1.4%. Among the 100 patients from group 1 and 2, 30 patients (26.5%) were lost to follow-up before primaquine initiation. CONCLUSIONS: In patients treated for P. vivax infection, G6PD activity did not vary over time. Therefore, G6PD activity on D1 instead of D14 could be used for primaquine dose-adjustment. This could allow earlier radical treatment with primaquine, that could have a public health impact by decreasing early recurrences and patients lost to follow-up before primaquine initiation. This hypothesis needs to be confirmed in larger prospective studies.


Assuntos
Antimaláricos , Glucosefosfato Desidrogenase , Malária Vivax , Adulto , Idoso , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Adulto Jovem , Antimaláricos/uso terapêutico , Artemisininas/uso terapêutico , Cloroquina/uso terapêutico , Guiana Francesa/epidemiologia , Glucosefosfato Desidrogenase/metabolismo , Deficiência de Glucosefosfato Desidrogenase/epidemiologia , Deficiência de Glucosefosfato Desidrogenase/complicações , Cinética , Malária Vivax/tratamento farmacológico , Plasmodium vivax/efeitos dos fármacos , Plasmodium vivax/fisiologia , Primaquina/uso terapêutico , Estudos Retrospectivos , Idoso de 80 Anos ou mais
3.
Ecotoxicol Environ Saf ; 269: 115771, 2024 Jan 01.
Artigo em Inglês | MEDLINE | ID: mdl-38100848

RESUMO

The Petit Saut hydroelectric dam and the upstream and downstream areas of the Sinnamary River in French Guiana (Amazon basin) have been studied from 1993 to 2020. The nearly thirty-years-long study of the monitoring of total mercury concentration in fish and the physicochemical survey of the environment made it possible to demonstrate the impact of the flooding of the forest and the role of the hydroelectric dam on the methylation of mercury. Results show that the physicochemical modifications generated by the construction of the dam led to a significant production of methylmercury (MeHg) in the anoxic part of the reservoir and downstream of the river leading to a strong spatio-temporal impact of the dam. Seven species of fishes are studied and their mercury concentrations vary according to many parameters: fish diet, position in the water column, site, lake oxycline level and time.


Assuntos
Mercúrio , Compostos de Metilmercúrio , Poluentes Químicos da Água , Animais , Mercúrio/análise , Guiana Francesa , Monitoramento Ambiental , Poluentes Químicos da Água/análise , Peixes
4.
Sensors (Basel) ; 24(6)2024 Mar 18.
Artigo em Inglês | MEDLINE | ID: mdl-38544194

RESUMO

A surface urban heat island (SUHI) is a phenomenon whereby temperatures in urban areas are significantly higher than that of surrounding rural and natural areas due to replacing natural and semi-natural areas with impervious surfaces. The phenomenon is evaluated through the SUHI intensity, which is the difference in temperatures between urban and non-urban areas. In this study, we assessed the spatial and temporal dynamics of SUHI in two urban areas of the French Guiana, namely Ile de Cayenne and Saint-Laurent du Maroni, for the year 2020 using MODIS-based gap-filled LST data. Our results show that the north and southwest of Ile de Cayenne, where there is a high concentration of build-up areas, were experiencing SUHI compared to the rest of the region. Furthermore, the northeast and west of Saint-Laurent du Maroni were also hotspots of the SUHI phenomenon. We further observed that the peak of high SUHI intensity could reach 5 °C for both Ile de Cayenne and Saint-Laurent du Maroni during the dry season when the temperature is high with limited rainfall. This study sets the stage for future SUHI studies in French Guiana and aims to contribute to the knowledge needed by decision-makers to achieve sustainable urbanization.

5.
Emerg Infect Dis ; 29(2): 333-340, 2023 02.
Artigo em Inglês | MEDLINE | ID: mdl-36692350

RESUMO

Human brucellosis is a zoonoses caused by bacteria of the genus Brucella. Infection results in subacute or chronic debilitating disease with nonspecific clinical manifestations and is often associated with consuming unpasteurized dairy products. We report 2 cases of brucellosis in male patients who were hospitalized in distinct towns of French Guiana, an overseas territory of France located on the northeastern shore of South America. Both men were citizens of Brazil working as clandestine goldminers in the deep Amazonian rainforest. Characterization of the 2 bacterial isolates revealed that they represent a potential new species of Brucella. Medical practitioners working in contact with wildlife in this region of the world should be aware of the existence of these pathogens and the potential for human infection.


Assuntos
Brucella , Brucelose , Animais , Humanos , Masculino , Guiana Francesa/epidemiologia , Brucelose/diagnóstico , Brucelose/epidemiologia , Brucelose/microbiologia , Zoonoses/microbiologia , Brasil
6.
BMC Public Health ; 23(1): 1585, 2023 08 19.
Artigo em Inglês | MEDLINE | ID: mdl-37598208

RESUMO

BACKGROUND: A steady decline in the number of cases of malaria was observed in the 2000s in French Guiana. This enabled regional health policies to shift their public health goal from control to elimination. To include inhabitants in this strategy, the main objective of this study was to describe knowledge about malaria, and related attitudes and practices in persons living in the French Guiana border. METHODS: We conducted a survey in people over 15 years old living in the twelve neighbourhoods of Saint-Georges de l'Oyapock with the highest malaria incidence. It comprised a 147-item questionnaire which collected data on socio-demographic characteristics and included a Knowledge Attitude and Practices survey on malaria. Knowledge-related data were studied using exploratory statistical methods to derive summary variables. A binary variable assessing level of knowledge was proposed and then assessed using exploratory approaches. RESULTS: The mean age of the 844 participants was 37.2 years [15.8], the male/female sex ratio was 0.8. In terms of nationality, 485 (57.5%) participants were Brazilian and 352 (41.7%) French. One third (305, 36.1%) spoke Brazilian Portuguese as their native language, 295 (34.9%) the Amerindian language Palikur, 36 (4.3%) French. The symptoms of malaria and prevention means were poorly known by 213 (25.2%) and 378 (44.8%) respondents, respectively. A quarter (206, 24.4%) did not know that malaria can be fatal. Overall, 251 people (29.7%) had an overall poor level of knowledge about malaria. Being under 25 years old, living in a native Amerindian neighbourhood, having an Amerindian mother tongue language, having risk behaviours related to gold mining were significantly associated with a poor level of knowledge. CONCLUSIONS: This study is the first to describe the poor level of knowledge about malaria in populations living in the malaria endemic border area along the Oyapock river in French Guiana. Results will allow to reinforce, to diversify and to culturally adapt prevention messages and health promotion to increase their effectiveness with a view to quickly reaching the goal of malaria elimination through empowerment.


Assuntos
Malária , Grupo Social , Humanos , Feminino , Masculino , Adulto , Adolescente , Brasil , Diversidade Cultural , Etnicidade , Malária/epidemiologia , Malária/prevenção & controle
7.
Mycopathologia ; 188(6): 1065-1078, 2023 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-37839020

RESUMO

BACKGROUND: Histoplasmosis is mainly described as a disseminated disease in people living with HIV (PLHIV). Compared to historical descriptions in immunocompetent individuals, knowledge is lacking on the detailed clinical and radiological findings and outcomes of pulmonary histoplasmosis (PH). Overlooked or misdiagnosed with other AIDS-defining condition, prognostic of PLHIV may be at risk because of inappropriate care. METHODS: A retrospective multicentric study was conducted in PLHIV from French Guiana between January 1988 and October 2019. Proven PH were documented through mycological direct examination, culture, or histology. Patients with concomitant respiratory infections were excluded. RESULTS: Among 65 patients, sex ratio M:F was 2.4 with a median age of 39 years [IQR 25-75%: 34-44]. Median CD4 count was 24 cells/mm3 [11-71], with histoplasmosis as the AIDS-defining condition in 88% and concomitant AIDS-defining conditions in 29%. Clinical findings were fever (89%), cough (58%), dyspnea (35%), expectoration (14%), and hemoptysis (5%). Sixty-one X-rays and 24 CT-scans were performed. On X-rays, an interstitial lung disease was mainly found (77%). On CT-scans, a nodular pattern was predominant (83%): mostly miliary disease (63%), but also excavated nodules (35%). Consolidations were present in 46%, associated with miliary disease in 21%. Thoracic lymphadenopathies were found in 58%, mainly hilar and symmetric (33%). Despite antifungal treatment, case-fatality rate at one month was 22%. CONCLUSION: When faced with an interstitial lung disease on X-rays or a miliary pattern on CT-scans in advanced PLHIV, physicians in endemic areas, apart from tuberculosis or pneumocystosis, should include histoplasmosis as part of their differential diagnoses.


Assuntos
Infecções Oportunistas Relacionadas com a AIDS , Síndrome da Imunodeficiência Adquirida , Histoplasmose , Pneumopatias Fúngicas , Doenças Pulmonares Intersticiais , Pneumonia por Pneumocystis , Humanos , Adulto , Histoplasmose/diagnóstico , Histoplasmose/epidemiologia , Histoplasmose/complicações , HIV , Infecções Oportunistas Relacionadas com a AIDS/diagnóstico , Estudos Retrospectivos , Prognóstico , Síndrome da Imunodeficiência Adquirida/complicações , Guiana Francesa/epidemiologia , Pneumopatias Fúngicas/diagnóstico por imagem , Pneumopatias Fúngicas/epidemiologia , Tomografia Computadorizada por Raios X , Pneumonia por Pneumocystis/complicações , Doenças Pulmonares Intersticiais/complicações
8.
Rev Epidemiol Sante Publique ; 71(6): 102175, 2023 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-37918040

RESUMO

BACKGROUND: French Guiana is a French overseas territory which combines a well-funded universal health system and a population where half are under the poverty line. In this context, we aimed to measure and describe the causes of infant mortality and, because French Guiana is a French territory, to compare them with mainland France. METHODS: National death certificate data between 2001 and 2017 was used. RESULTS: Overall, 6.9 % of deaths before 65 years concerned infants <1 year (in mainland France 2.6%). The infant mortality rate over the 2001-2017 period was 2.6 times that of mainland France (1159.5 vs 446.2 per 100,000 infants <1 year) with excess incidence in perinatal causes, malformations and chromosomal anomalies, accidents, infectious causes, and in poorly defined conditions. Over time, there seemed to be a reduction of infant mortality for all the main causes, except for congenital malformations and chromosomal anomalies, which, on the contrary, seemed to increase. The data sources did not allow to study the weight of social factors or place of residence. CONCLUSIONS: All causes of infant mortality seemed to decline over time except malformations and chromosomal anomalies, which increased. Although exposure to heavy metals, infectious diseases are potential explanations we cannot pinpoint the cause of this increase with the available data. The present results suggest infant mortality and malformations should benefit from more detailed data sources in order to better assess and alleviate the burden of infant mortality in French Guiana.


Assuntos
Mortalidade Infantil , Humanos , Lactente , França/epidemiologia , Guiana Francesa/epidemiologia , Incidência
9.
Emerg Infect Dis ; 28(8): 1673-1676, 2022 08.
Artigo em Inglês | MEDLINE | ID: mdl-35876693

RESUMO

We report a case of unusual human anaplasmosis in the Amazon rainforest of French Guiana. Molecular typing demonstrated that the pathogen is a novel Anaplasma species, distinct to all known species, and more genetically related to recently described Anaplasma spp. causing infections in rainforest wild fauna of Brazil.


Assuntos
Anaplasmose , Infecções por Rickettsia , Anaplasma/genética , Anaplasmose/diagnóstico , Anaplasmose/tratamento farmacológico , Animais , Brasil , Humanos , Floresta Úmida
10.
Emerg Infect Dis ; 28(2): 445-448, 2022 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-35076005

RESUMO

We report a case of vertical transmission of Tonate virus in a pregnant woman from French Guiana. The fetus showed severe necrotic and hemorrhagic lesions of the brain and spinal cord. Clinicians should be made aware of possible adverse fetal outcomes in pregnant women infected with Tonate virus.


Assuntos
Alphavirus , Encéfalo , Feminino , Guiana Francesa/epidemiologia , Humanos , Transmissão Vertical de Doenças Infecciosas , Gravidez
11.
Sante Publique ; 34(5): 695-707, 2022.
Artigo em Francês | MEDLINE | ID: mdl-36577668

RESUMO

INTRODUCTION: With the increase in life expectancy of the population, the progression of chronic diseases, in particular cardiovascular diseases, neurodegenerative diseases (NDD) and their complications, health and medico-social care represents a major public health issue. OBJECTIVE: The aim of this article is to present an overview of the situation of the elderly and the current organization of the healthcare system for their care in French Guiana. METHOD: A review of the literature and analysis of the most recent data related to demographics, socioeconomics, morbidity and mortality, supply and use of care, were carried out. For comparative purposes, these data were compared with those for mainland France and the other French overseas departments and regions when available. RESULTS: With an average annual growth rate of +6.7% among people aged 65 and over, the highest in France (excluding Mayotte), the aging phenomenon has begun in French Guiana, although its population is still young. The health status of the elderly in French Guiana, characterized by an early onset of dependency and a greater prevalence of silent diseases (arterial hypertension, diabetes, hypercholesterolemia), is less favorable than in mainland France. In addition, the health and medico-social provision for the elderly remain incomplete or even embryonic, with little adapted support for elderly people with NND. CONCLUSION: This review highlights the situation of elderly people and the challenges for the health system.


Introduction: Avec l'allongement de l'espérance de vie de la population, la progression des maladies chroniques, notamment des maladies cardioneurovasculaires, maladies neurodégénératives (MND) et leurs complications, la prise en charge sanitaire et médico-sociale représente un enjeu majeur de santé publique. Objectif: Cet article a pour objectif de présenter un état des lieux de la situation des personnes âgées (PA) et de l'organisation actuelle du système de santé pour leur prise en charge en Guyane. Méthode: Une revue de la littérature et l'analyse de données démographiques, socioéconomiques, de morbidité et de mortalité, d'offre et de recours aux soins les plus récentes ont été réalisées. À des fins de comparaison, ces données ont été confrontées avec celles de la France hexagonale et des autres départements et régions d'outre-mer lorsque celles-ci étaient disponibles. Résultats: Avec un taux d'accroissement annuel moyen de +6,7 % chez les 65 ans et plus le plus élevé de France (hors Mayotte), le phénomène de vieillissement est amorcé en Guyane, bien que sa population reste encore jeune. L'état de santé des PA en Guyane, caractérisé par une entrée en dépendance précoce et une plus grande prévalence des maladies silencieuses (hypertension artérielle, diabète, hypercholestérolémie), est moins favorable qu'en France hexagonale. De plus, l'offre sanitaire et médico-sociale pour les PA reste lacunaire, voire embryonnaire, avec peu d'accompagnement adapté pour PA atteintes de MND. Conclusion: Cet état des lieux met en exergue la situation des PA et des enjeux pour le système de santé.


Assuntos
Envelhecimento , Nível de Saúde , Humanos , Idoso , Guiana Francesa/epidemiologia , França/epidemiologia , Morbidade
12.
Sante Publique ; 34(5): 683-693, 2022.
Artigo em Francês | MEDLINE | ID: mdl-36577667

RESUMO

CONTEXT: In French Guiana, Amerindian populations find themselves in a health system whose therapeutic itinerary revolves around their traditional medicine and modern medicine provided by health professionals mostly from hexagonal France. The latter intervene in a “complexity of intercultural contact” which influences the caregiver-patient relationship and affects therapeutic adherence. METHOD: To better understand the practices and representations of the health system in an intercultural context, qualitative research was carried out in the field between 2018 and 2019 with seventeen health professionals working in health centers located in the municipalities of the Interior of French Guiana. Semi-structured individual interviews were conducted in order to explore the representations, the difficulties encountered, and the tools used by these caregivers in their daily practice. These interviews were crossed with participant observations and bibliographical research in the medical and anthropological fields. RESULTS: The caregiver-patient encounter was asymmetrical, unequal and was part of a power relationship. The caregivers remained marked by ethnocentric representations -inherent to each culture- far removed from those of the populations and this divergence impacted the practice. DISCUSSION: It would be advisable to shift the focus in order to « penetrate » the frame of reference of the Other and rebalance relationships. The exploration of popular knowledge and skills and the application of proven teaching methods would encourage therapeutic adherence. « Homethnic workers » and intercultural training could help promote community health.


Contexte: En Guyane française, les populations amérindiennes se retrouvent dans un système de santé dont l'itinéraire thérapeutique s'articule autour de leur médecine traditionnelle et d'une médecine moderne prodiguée par des professionnels de santé originaires, pour la plupart, de la France hexagonale. Ces derniers interviennent dans une « complexité de contact interculturel ¼ qui influence la relation soignant soigné et affecte l'adhésion thérapeutique. Méthode: Pour mieux comprendre les représentations et pratiques du système de santé en contexte interculturel, une recherche qualitative a été menée sur le terrain, en 2018 et 2019, auprès de dix-sept professionnels de santé exerçant dans les centres de santé situés dans les communes de l'Intérieur de la Guyane. Des entretiens individuels semi-structurés ont été menés afin d'explorer les représentations, les difficultés rencontrées et les outils mobilisés par ces soignants dans leur pratique courante. Ces entretiens ont été croisés avec des observations participantes et des recherches bibliographiques dans les champs médicaux et anthropologiques. Résultats: La rencontre soignant soigné était asymétrique, inégale et s'inscrivait dans un rapport de pouvoir. Les soignants restaient marqués de représentations ethnocentriques - inhérentes à chaque culture - éloignées de celles des populations amérindiennes, et cette divergence impactait la pratique. Discussion: Il conviendrait de se décentrer, pour « pénétrer ¼ dans le cadre de référence de l'Autre et rééquilibrer les rapports. L'exploration des savoirs et savoir-faire populaires et l'application de méthodes éprouvées d'enseignement encourageraient l'adhésion thérapeutique. Les « intervenants homethniques ¼ et une formation à l'interculturalité pourraient favoriser la promotion de la santé communautaire.


Assuntos
Cuidadores , Pessoal de Saúde , Humanos , Guiana Francesa , França , Pesquisa Qualitativa
13.
Emerg Infect Dis ; 27(4)2021 04.
Artigo em Inglês | MEDLINE | ID: mdl-33756099

RESUMO

Although essential for control strategies, knowledge about transmission cycles is limited for Venezuelan equine encephalitis complex alphaviruses (VEEVs). After testing 1,398 bats from French Guiana for alphaviruses, we identified and isolated a new strain of the encephalitogenic VEEV species Tonate virus (TONV). Bats may contribute to TONV spread in Latin America.


Assuntos
Alphavirus , Quirópteros , Vírus da Encefalite Equina Venezuelana , Encefalomielite Equina Venezuelana , Animais , Guiana Francesa , Cavalos
14.
Emerg Infect Dis ; 27(2): 490-498, 2021 02.
Artigo em Inglês | MEDLINE | ID: mdl-33496246

RESUMO

Whether prolonged maternal viremia after Zika virus infection represents a risk factor for maternal-fetal transmission and subsequent adverse outcomes remains unclear. In this prospective cohort study in French Guiana, we enrolled Zika virus-infected pregnant women with a positive PCR result at inclusion and noninfected pregnant women; both groups underwent serologic testing in each trimester and at delivery during January-July 2016. Prolonged viremia was defined as ongoing virus detection >30 days postinfection. Adverse outcomes (fetal loss or neurologic anomalies) were more common in fetuses and neonates from mothers with prolonged viremia (40.0%) compared with those from infected mothers without prolonged viremia (5.3%, adjusted relative risk [aRR] 7.2 [95% CI 0.9-57.6]) or those from noninfected mothers (6.6%, aRR 6.7 [95% CI 3.0-15.1]). Congenital infections were confirmed more often in fetuses and neonates from mothers with prolonged viremia compared with the other 2 groups (60.0% vs. 26.3% vs. 0.0%, aRR 2.3 [95% CI 0.9-5.5]).


Assuntos
Complicações Infecciosas na Gravidez , Infecção por Zika virus , Zika virus , Feminino , Guiana Francesa/epidemiologia , Humanos , Recém-Nascido , Gravidez , Complicações Infecciosas na Gravidez/epidemiologia , Estudos Prospectivos , Viremia/diagnóstico , Viremia/epidemiologia , Zika virus/genética , Infecção por Zika virus/complicações , Infecção por Zika virus/diagnóstico , Infecção por Zika virus/epidemiologia
15.
Emerg Infect Dis ; 27(10): 2711-2714, 2021 10.
Artigo em Inglês | MEDLINE | ID: mdl-34545800

RESUMO

Oropouche fever is a zoonotic dengue-like syndrome caused by Oropouche virus. In August-September 2020, dengue-like syndrome developed in 41 patients in a remote rainforest village in French Guiana. By PCR or microneutralization, 23 (82.1%) of 28 tested patients were positive for Oropouche virus, documenting its emergence in French Guiana.


Assuntos
Infecções por Bunyaviridae , Orthobunyavirus , Infecções por Bunyaviridae/epidemiologia , Surtos de Doenças , Guiana Francesa/epidemiologia , Humanos , Orthobunyavirus/genética
16.
Emerg Infect Dis ; 27(10): 2673-2676, 2021 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-34289335

RESUMO

An outbreak of severe acute respiratory syndrome coronavirus 2 caused by the Gamma variant of concern infected 24/44 (55%) employees of a gold mine in French Guiana (87% symptomatic, no severe forms). The attack rate was 60% (15/25) among fully vaccinated miners and 75% (3/4) among unvaccinated miners without a history of infection.


Assuntos
COVID-19 , SARS-CoV-2 , Guiana Francesa/epidemiologia , Ouro , Humanos
17.
Mol Ecol ; 30(20): 5080-5093, 2021 10.
Artigo em Inglês | MEDLINE | ID: mdl-34387001

RESUMO

Closely related tree species that grow in sympatry are abundant in rainforests. However, little is known of the ecoevolutionary processes that govern their niches and local coexistence. We assessed genetic species delimitation in closely related sympatric species belonging to two Neotropical tree species complexes and investigated their genomic adaptation to a fine-scale topographic gradient with associated edaphic and hydrologic features. Combining LiDAR-derived topography, tree inventories, and single nucleotide polymorphisms (SNPs) from gene capture experiments, we explored genome-wide population genetic structure, covariation of environmental variables, and genotype-environment association to assess microgeographic adaptations to topography within the species complexes Symphonia (Clusiaceae), and Eschweilera (Lecythidaceae) with three species per complex and 385 and 257 individuals genotyped, respectively. Within species complexes, closely related tree species had different realized optima for topographic niches defined through the topographic wetness index or the relative elevation, and species displayed genetic signatures of adaptations to these niches. Symphonia species were genetically differentiated along water and nutrient distribution particularly in genes responding to water deprivation, whereas Eschweilera species were genetically differentiated according to soil chemistry. Our results suggest that varied topography represents a powerful driver of processes modulating tropical forest biodiversity with differential adaptations that stabilize local coexistence of closely related tree species.


Assuntos
Florestas , Árvores , Adaptação Fisiológica/genética , Biodiversidade , Humanos , Floresta Úmida , Árvores/genética , Clima Tropical
18.
Trop Med Int Health ; 26(11): 1462-1469, 2021 11.
Artigo em Inglês | MEDLINE | ID: mdl-34310800

RESUMO

OBJECTIVES: Disseminated histoplasmosis is a major killer of HIV-infected persons in Latin America. Antigen detection, fungal culture and Polymerase Chain Reaction are often not available, but cytology and histology are present in most hospitals and may offer a diagnostic alternative. In this study, we review 34 years of clinical experience to describe the roles of cytology and histology in diagnosing disseminated histoplasmosis. METHODS: Retrospective multicentric study of 349 patients between 1 January 1981 and 1 October 2014 with confirmed disseminated histoplasmosis. RESULTS: Around 32/214 (14.9%) of samples were screened using cytopathology, as were 10/101 (9.9%) bronchoalveolar lavage samples and 5/61 (8.2%) of spinal fluid samples. The samples most commonly sent to pathology were liver biopsies, lower digestive tract and lymphnode biopsies; the greatest proportion of positive results were found in lower digestive tract (43/59 (72.9%) positives), lymph node (39/63 (66.1%)), and liver (38/75 (50.7%)) samples. Overall, 97.2% of bone marrow and 97% of bronchoalveolar lavage samples were directly examined by a mycologist. Positive direct examination was independently associated with death (aHR = 1.5 (95%CI = 1-2.2)). CONCLUSIONS: Opportunities for a rapid diagnosis were regularly missed, notably for bone marrow samples, which could have been examined using staining methods complementary to those of the mycologist.


Assuntos
Infecções Oportunistas Relacionadas com a AIDS/epidemiologia , Atenção à Saúde , Histoplasmose/epidemiologia , Patologistas , Infecções Oportunistas Relacionadas com a AIDS/complicações , Infecções Oportunistas Relacionadas com a AIDS/diagnóstico , Adulto , Feminino , Guiana Francesa/epidemiologia , Histoplasmose/complicações , Histoplasmose/diagnóstico , Humanos , Masculino , Estudos Retrospectivos
19.
Parasitology ; 148(11): 1353-1359, 2021 09.
Artigo em Inglês | MEDLINE | ID: mdl-34100346

RESUMO

Six Dipetalonema species have been reported from Neotropical monkeys, Dipetalonema gracile, Dipetalonema graciliformis and Dipetalonema caudispina being the dominant species found in French Guiana primates. Adult filarioids isolated from the abdominal cavity of tamarins (Saguinus midas) in French Guiana were morphologically and molecularly identified as D. graciliformis. Phylogenetic analysis based on DNA and amino acid sequences of the cox1 gene as well as the concatenated sequences of the cox1 and the 18S genes indicated that D. graciliformis belongs to the clade 4 (ONC4) of Onchocercidae. Blast analysis of the 18S rDNA revealed that D. graciliformis in the studied tamarins is conspecific with the filarioid circulating in howler monkeys (Alouatta macconnelli) in French Guiana, previously referred to as unidentified Onchocercidae species.


Assuntos
Infecções por Dipetalonema/veterinária , Dipetalonema/classificação , Doenças dos Macacos/parasitologia , Saguinus/parasitologia , Animais , Dipetalonema/anatomia & histologia , Dipetalonema/isolamento & purificação , Infecções por Dipetalonema/epidemiologia , Infecções por Dipetalonema/parasitologia , Feminino , Guiana Francesa/epidemiologia , Masculino , Doenças dos Macacos/epidemiologia
20.
Rev Panam Salud Publica ; 45: e46, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33936184

RESUMO

Hospitals in the French Territories in the Americas (FTA) work according to international and French standards. This paper aims to describe different aspects of critical care in the FTA. For this, we reviewed official information about population size and intensive care unit (ICU) bed capacity in the FTA and literature on FTA ICU specificities. Persons living in or visiting the FTA are exposed to specific risks, mainly severe road traffic injuries, envenoming, stab or ballistic wounds, and emergent tropical infectious diseases. These diseases may require specific knowledge and critical care management. However, there are not enough ICU beds in the FTA. Indeed, there are 7.2 ICU beds/100 000 population in Guadeloupe, 7.2 in Martinique, and 4.5 in French Guiana. In addition, seriously ill patients in remote areas regularly have to be transferred, most often by helicopter, resulting in a delay in admission to intensive care. The COVID-19 crisis has shown that the health care system in the FTA is unready to face such an epidemic and that intensive care bed capacity must be increased. In conclusion, the critical care sector in the FTA requires upgrading of infrastructure, human resources, and equipment as well as enhancement of multidisciplinary care. Also needed are promotion of training, research, and regional and international medical and scientific cooperation.


Los hospitales en los territorios franceses de la Región de las Américas funcionan según las normas francesas e internacionales. El objetivo de este artículo es describir distintos aspectos de los cuidados intensivos en los territorios franceses. Para ello, hemos revisado los datos oficiales sobre el tamaño de la población y el número de camas de las unidades de cuidados intensivos (UCI), así como la bibliografía sobre algunos aspectos específicos de las UCI, en los territorios franceses. Las personas que viven en los territorios franceses, o que están de visita en ellos, están expuestas a riesgos específicos: principalmente traumatismos graves causados por el tránsito, envenenamiento por mordeduras, heridas de bala o por apuñalamiento, y enfermedades infecciosas tropicales emergentes. La atención de estos traumatismos y enfermedades puede requerir conocimientos específicos y cuidados intensivos. Sin embargo, no hay suficientes camas de UCI en los territorios franceses. De hecho, hay 7,2 camas de UCI por 100 000 habitantes en Guadalupe, 7,2 en Martinica y 4,5 en Guayana Francesa. Además, los pacientes gravemente enfermos que viven en zonas remotas a menudo tienen que ser trasladados, normalmente por helicóptero, lo que retrasa su ingreso en la unidad de cuidados intensivos. La crisis de la COVID-19 ha puesto de manifiesto que el sistema de atención de salud en los territorios franceses no está preparado para enfrentarse a una epidemia de estas dimensiones y que debe aumentarse la capacidad hospitalaria de las unidades de cuidados intensivos. En conclusión, el sector de los cuidados intensivos en los territorios franceses tiene que mejorar su infraestructura, recursos humanos y equipamiento, así como perfeccionar la atención multidisciplinaria. También es necesario promover la capacitación, la investigación y la cooperación médica y científica, tanto regional como internacional.


Os hospitais nos territórios ultramarinos franceses nas Américas funcionam segundo os padrões franceses e internacionais. O objetivo deste artigo é descrever os diversos aspectos da atenção intensiva nesta região. Analisamos os dados oficiais relativos ao tamanho da população e ao número de leitos de unidade de terapia intensiva (UTI) nestes territórios junto com uma revisão da literatura científica sobre as características particulares destes centros de terapia intensiva. Os residentes locais ou visitantes dos territórios ultramarinos franceses nas Américas são expostos a riscos específicos, sobretudo acidentes de trânsito graves, envenenamentos por animais peçonhentos, ferimentos por armas brancas ou armas de fogo e doenças infecciosas tropicais emergentes que requerem conhecimento especializado e atenção intensiva. Porém, não há leitos suficientes de UTI nos territórios ultramarinos franceses nas Américas: são 7,2 leitos de UTI por 100.000 habitantes em Guadalupe, 7,2 na Martinica e 4,5 na Guiana Francesa. Ademais, em áreas remotas, os pacientes em estado crítico frequentemente precisam ser transferidos por helicóptero, o que causa demora na internação em UTI. A crise da COVID-19 demonstra o despreparo do sistema de saúde para enfrentar a pandemia e a necessidade de aumentar o número de leitos de UTI nestes territórios. Em conclusão, é imprescindível modernizar a infraestrutura e os equipamentos, capacitar melhor os recursos humanos e melhorar a atenção multidisciplinar. Incentivar a formação profissional, pesquisa e cooperação médico-científica regional e mundial é também fundamental.

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