C. A. Romana

Studies that explicitly and specifically take into account the spatial dimension within the study of eco-epidemiological systems remain rare. Our approach of modelling the spatial and/or temporal properties of the entomological and/or epidemiological data before their mapping with possible explanatory variables, objectively underline the significan...

The French Institute for Public Health Surveillance (InVS, French Public Health Agency) described its complex activities of monitoring, surveillance and warning into official reports published in 2005, 2006 and 2011. Taking these documents as a starting point, we employed Object-Oriented Analysis (OOA) and Universal Modeling Language (UML) to desig...

While the former part of this back-to-back paper dealt with the identification of multi-scale spatial patterns associated with the presence, abundance and dispersion of the insect vectors (Triatominae) of Chagas disease, this latter part examines the need for pattern characterisation by means of detailed data on environmental, residential, peri-dom...

Background: Research on changing dietary practices is rare in lower and middle income countries, and understanding the impact of global economic processes on population health and nutrition is important, especially of rural communities. We analyzed the diet of 22 families in Brasília Legal, a riverside community in the Tapajós River region of the...

In this study, we explore longitudinal tendencies of rural smallholder livelihoods in the Tapajós River region, in the area of influence of the BR-163 following two lines of inquiry: 1) have livelihoods changed since the early 2000s and if so, 2) how have they changed? Drawing on participant observations, life history interviews and cross-sectional...

In the Tapajós River region of the Brazilian Amazon, mercury (Hg) is a prevalent contaminant in the aquatic ecosystem. Few studies have used comprehensive chronological analyses to examine the combined effects of environmental and anthropogenic factors on Hg accumulation in sediments. Total mercury (THg) content was measured in sediments from eight...

In the Tapajos´s River region of the Brazilian Amazon, mercury (Hg) is a prevalent contaminant in the aquatic ecosystem. Few studies have used comprehensive chronological analyses to examine the combined effects of environmental and anthropogenic factors on Hg accumulation in sediments. Total mercury (THg) content was measured in sediments from eig...

O presente estudo reporta as concentrações plasmáticas dos antioxidantes cobre (Cu), manganês (Mn), selênio (Se), zinco (Zn), β-caroteno, licopeno e vitaminas (A e E) em moradores da região do Rio Tapajós, Pará, Amazônia, e as relaciona com características sociodemográficas e sazonalidade (seca e cheia). Os teores de Mn, Se e Zn foram acima dos val...

The few lignin biomarker studies conducted in tropical environments are hampered by having to use references signatures established for plants and soils characteristic of the temperate zone. This study presents a lignin biomarker analysis (vanillyls (V), p-hydroxyls (P), syringyls (S), cinnamyls (C)) of the dominant plant species and soil horizons...

Pressures on the Brazilian Amazon forest have been accentuated by agricultural activities practiced by families encouraged to settle in this region in the 1970s by the colonization program of the government. The aims of this study were to analyze the temporal and spatial evolution of land cover and land use (LCLU) in the lower Tapajós region, in th...

Pressures on the Brazilian Amazon forest have been accentuated by agricultural activities practiced by families encouraged to settle in this region in the 1970s by the colonization program of the government. The aims of this study were to analyze the temporal and spatial evolution of land cover and land use (LCLU) in the lower Tapajós region, in th...

Face à l’émergence de nouveaux dangers en santé environnementale, l’optimisation des dispositifs de surveillance constitue un enjeu prioritaire pour les institutions françaises. Ces dispositifs font appel à des concepts hétérogènes, nombreux et spécifiques et sont souvent fragmentés entre les différents acteurs. L’article apporte une contribution à...

Agroforestry systems are widely recognized as an important way to address numerous environmental challenges in tropical areas. They represent a sustainable alternative form of land-use for small-scale agriculture, responding to the economic development needs of communities and offering a number of ecosystem services. This article presents an evalua...

Regime shifts describe the sometimes rapid and abrupt changes of a system to an alternative stable state, whereby the structure of the system is changed. Shifts are often triggered by an external event and involve the crossing of a critical threshold. The notion of regime shifts is well documented in the systems ecology literature but has rarely be...

The rising number of acute cases of Chagas disease in the State of Para, reported in the past two decades, has been associated, in part, with the ingestion of juice of local palm tree fruits, mainly acai berry and bacaba. Near the study area, in Santarem, Para State, an outbreak of Chagas disease has been notified and investigations suggest the con...

Sampling design is a key issue when establishing species inventories and characterizing habitats within highly heterogeneous landscapes. Sampling efforts in such environments may be constrained and many field studies only rely on subjective and/or qualitative approaches to design collection strategy. The region of Cacao, in French Guiana, provides...

In 2009, the French Institute for Public Health Surveillance, a major actor in health alerts, listed 106 environmental threats to public health. The aim of this article is to extend this census by identifying the warning systems that exist in environmental health, to describe their functions, their structure, their organizational methods and finall...

Identifying potential hosts of T. cruzi and T. rangeli from the analysis of Cytochrome B from the digestive tube of Rhodnius spp collected in the region of the middle Tapajós River, Pará, Brazil. In the last few years, most severe outbreaks of Chagas disease in Brazil are concentrated in the Amazon region. Determining triatomines’ food sources is a...

Résumé. Acteur français important de l'alerte sanitaire, l'Institut de veille sanitaire (InVS) a établi en 2009 un recensement de 106 menaces environnementales pour la santé publique. Dans le prolongement de ce recensement, le présent travail avait pour objectif de repérer les dispositifs d'alerte existant en santé environnementale, de décrire leur...

Social and ecological processes and underlying drivers related to mercury mobilization and exposure: the case of the Tapajos River region, Brazilian Amazon. In the Tapajos River region of the Brazilian Amazon, deforestation and slash-and-burn agricultural practices are primary drivers of mercury mobilization from the tropical soils. Through erosion...

In the Tapajos River Region of the Brazilian Legal Amazon, land-management practices and extensive deforestation have been identified as primary factors leading to the transport of naturally formed soil mercury from the pedosphere to the hydrosphere. In this same region, river-dwelling populations are exposed to high levels of organic mercury throu...

The term "landscape" is often associated with some subjective way to represent the environment. It also has strong social, cultural, and economic connotations and even an artistic and visual component. Finally, the landscape touches issues of society and public policy. However in recent years the concept, which has also joined the realm of science,...

Environmental Factors Associated with the Presence of Attalea Palm to Help Assessing the Risk of Human Exposure to American Trypanosomiasis in the AmazonKeywords: American Trypaniosomiasis, Amazon, Deforestation, Attalea palms There is a growing concern that the Amazon could become an area with an increasing risk of exposure to American Trypanosomi...

Lacustrine mercury deposition records in the Tapajos River region, Brazilian Amazon: links to historical land-use/land-cover change. 10 th International Conference on Mercury as a Global Pollutant (ICMGP), Halifax, Canada, July 24 th - 29 th (poster). Abstract: In the Tapajós River Region of the Brazilian Legal Amazon, land- management practices an...

A sylvatic infection focus of Trypanosoma rangeli, whose cycle involves the anteater Tamandua tetradactyla and triatomine insect Rhodnius robustus was observed in a pasture-dominated landscape of the rural riparian community of São Tomé located along the Tapajós river in the municipal district of Aveiro (State of Pará, Brazil), the Brazilian Amazon...

Triatoma brasiliensis is the most important Chagas disease vector in semiarid areas of Northeastern Brazil. Although generally found in natural environment, it regularly colonizes or reinvades domiciliary ecotopes. In order to analyse gene flow between habitats, we identified and characterized six microsatellite loci using a microsatellite-enriched...

Abstract. This paper deals with the characterization of the landscape composition and structure, by means of high resolution remote sensing, in order to explain the presence and the spatial distribution of Chagas disease vectors in a locality of the Iraquara municipality (Bahia, Brazil) where the disease is endemic. At a local scale, many other par...

Ten microsatellites were isolated and characterized from a partial genomic library of Rhodnius prolixus, the principal Chagas disease vector in Venezuela, Colombia and Central America. These polymorphic molecular markers could be particularly useful in Chagas disease control initiatives. A wider applicability of the primer-pairs isolated was shown,...

Six polymorphic microsatellite loci were isolated and characterized using a microsatellite-enriched genomic library from the Chagas' disease vector Triatoma pseudomaculata. This species is found in Brasil in Caatinga areas and predominantly in peridomestic habitats. All the microsatellites tested on a population of T. pseudomaculata sampled in the...

In this retrospective study on 141 HIV-positive subjects, allergy was studied by a specific questionnaire and the Phadia-Top-Test, an in vitro screening test detecting specific IgE; both were correlated to the patient's history, clinical symptoms and the treatment used. Allergy was studied in reference to HIV-negative controls and in relation to th...

Field observations carried in semi-arid Brazil Northeast point out the frequent association, in the peridomiciliary space, between a cactus, Cereus jamacaru, the occurrence of nests in its branches and the occurrence of two species of insects vectors of Trypanosoma cruzi, pathogenic agent of Chagas disease: Rhodnius neglectus and Triatoma pseudomac...

Les observations de terrain réalisées dans le nord-est du Brésil ont montré la fréquente association, dans l’espace péridomiciliaire, entre un cactus, le Cereus jamacaru, la présence de nids dans ses branches et celle de Rhodnius neglectus et de Triatoma pseudomaculata, espèces vectrices du parasite Trypanosoma cruzi, agent de la maladie de Chagas....

Para determinar e analisar a distribuição espacial de populações silvestres de triatomíneos no Distrito Federal, Brasil, foram amostradas 150 palmeiras da espécie Mauritia flexuosa em seis veredas de diferentes paisagens (silvestre, rural e periurbana) na estação chuvosa. Os triatomíneos foram identificados morfologicamente, separados por sexo e es...

To determine and analyze the distribution of Triatominae sylvatic populations in the Federal District of Brazil, 150 Mauritia flexuosa palm trees were sampled in six veredas of different landscapes (sylvatic, rural and peri-urban) in the rainy season. Triatomines were morphologically identified and grouped by sex and nymphal stage and were examined...

The rapid landscape change of the Arraijan city near Panama city allow us to undestand the distribution of this insect in relation with the densification of the urban territory.

Se realizó un estudio de la variación de subpoblaciones de Rhosnius pallescens, vectores de la enfermedad de Chagas en relación con las variaciones de las densidades de su ecotopo primario, la palmera Attalea butyracea, en relación con el uso atropico del suelo en la depresión central de Panamá, se empleó un muestreo por agotamiento con esfuerzo de...

Modifications of the landscape by human activity and migratory movements contribute to the emergence or reemergence of zoonotic and human diseases, particularly those transmitted by insects which often escape the changing environmental conditions, adapting and modifying their trophic networks and morphology, including their genotype. A better under...

Las modificaciones del paisaje causadas por las actividades y migraciones humanas contribuyen en hacer emerger o re-emerger enfermedades tropicales, particularmente aquellas cuya transmisión se realiza por insectos vectores que a menudo deben escapar a las condiciones cambiantes ambientales, adaptándose y modificando sus redes tróficas, su morfolog...

The influence of starvation and nutritional status on the time–mortality response of nymphs of Rhodnius prolixus Stål (Hem., Reduviidae) contaminated with Beauveria bassiana (Bals.) Vuillemin (Deuteromycotina, Hyphomycetes) was determined. Because of the induction of the moulting process by the blood meal, first-instar nymphs were less susceptible...

Estudio de la Distribución espacial de las poblaciones del insecto vector de la enfermedad de Chagas durante el periodo abril - julio de 2002, con el fin de identificar y caracterizar el riesgo según unidades funcionales del paisaje en la Provincia de Panamá. el estudio fue abordado mediante la puesta a punto de un protocolo para la estimación de l...

Un projet d'étude de la localisation des palmiers, habitat de l'insecte vecteur de la maladie de Chagas, dans la périphérie de la ville de Panama, dans le district d'Arraijan, en pleine transformation

Keywords:American trypanosomiasis;microsatellites;Rhodnius