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Spatial patterns and eco-epidemiological systems – part 2: multi-scale spatial modelling of the occurrence of Chagas disease insect vectors / Emmanuel Roux in Geospatial Health, vol 6 n° 1 (November 2011)

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[article]
inGeospatial Health > vol 6 n° 1 (November 2011) . - pp 53 - 64

Titre :	Spatial patterns and eco-epidemiological systems – part 2: multi-scale spatial modelling of the occurrence of Chagas disease insect vectors
Type de document :	Article/Communication
Auteurs :	Emmanuel Roux, Auteur ; Annamaria de Fátima Venâncio, Auteur ; Jean-François Girres , Auteur ; Christine A. Romaña, Auteur
Année de publication :	2011
Article en page(s) :	pp 53 - 64
Note générale :	bibliographie
Langues :	Anglais (eng)
Descripteur :	[Vedettes matières IGN] Analyse spatiale [Termes IGN] analyse en composantes principales [Termes IGN] autocorrélation spatiale [Termes IGN] Bahia (Brésil) [Termes IGN] épidémie [Termes IGN] Insecta [Termes IGN] maladie parasitaire [Termes IGN] matrice
Résumé :	(auteur) 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-domiciliary and human behaviour. The study site was, in both cases, a single village situated in Bahia, Brazil, wherefrom the data were collected through field observation and a standardised questionnaire, while the environmental characteristics were derived from satellite images and landscape characterisation. Following this, factorial analysis of mixed group (FAMG), an exploratory data analysis method, was applied to “mine” the huge dataset in a hierarchical way and to evaluate the relative impact of different factors such as the surrounding environment, the domiciliary/peri-domiciliary space properties and the presence of domestic animals. In the study village, five principal “districts” associated with different possible causes of infestation were identified. The results favour the role of depressions of the ground surface due to collapse of karstic subsoil (dolines) and open rock faces as infestation sources, vector attraction by outdoor lighting, risk of insect domiciliation in dwellings constructed without finishing materials and associated with apparent disorder. Ultimately, this study not only provides the basic information needed for decision-making and specification of vector control in the study village, but offers also a knowledge-base for more general control strategies in the region.
Numéro de notice :	A2011-606
Affiliation des auteurs :	COGIT+Ext (1988-2011)
Thématique :	GEOMATIQUE
Nature :	Article
nature-HAL :	ArtAvecCL-RevueIntern
DOI :	10.4081/gh.2011.157
Date de publication en ligne :	01/11/2011
En ligne :	https://doi.org/10.4081/gh.2011.157
Format de la ressource électronique :	URL article
Permalink :	https://documentation.ensg.eu/index.php?lvl=notice_display&id=91683

Voir aussi

Spatial patterns and eco-epidemiological systems – part 1: multi-scale spatial modelling of the occurrence of Chagas disease insect vectors / Emmanuel Roux in Geospatial Health, vol 6 n° 1 (November 2011)

Public

[article]
inGeospatial Health > vol 6 n° 1 (November 2011) . - pp 41 - 51

Titre :	Spatial patterns and eco-epidemiological systems – part 1: multi-scale spatial modelling of the occurrence of Chagas disease insect vectors
Type de document :	Article/Communication
Auteurs :	Emmanuel Roux, Auteur ; Annamaria de Fátima Venâncio, Auteur ; Jean-François Girres , Auteur ; Christine A. Romaña, Auteur
Année de publication :	2011
Article en page(s) :	pp 41 - 51
Note générale :	bibliographie
Langues :	Anglais (eng)
Descripteur :	[Vedettes matières IGN] Analyse spatiale [Termes IGN] analyse en composantes principales [Termes IGN] autocorrélation spatiale [Termes IGN] Bahia (Brésil) [Termes IGN] épidémie [Termes IGN] Insecta [Termes IGN] maladie parasitaire [Termes IGN] matrice
Résumé :	(auteur) 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 significant patterns at different scales. The domiciliary and peri-domiciliary presence and abundance of juvenile and adult vectors of the Chagas disease (Triatoma sordida and Panstrongylus geniculatus) in Bahia state in northeast Brazil, has been modelled by automatically identifying significant multi-scale spatial patterns of the entomological data by the application and adaptation of the spatial modelling methodology proposed by Dray et al. (2006) and based on principal coordinate analysis of neighbour matrices. We found that entomological data can be modelled by a set of eigenvectors that present a significant Moran’s I index of spatial autocorrelation. The models for juvenile and adult vectors are defined by 28 and 32 eigenvectors that explain 82.3% and 79.9%, respectively, of the total data variances. The results support insect presence as the outcome both of a local scale “near-to-near” dispersal and an infestation from the wild, surrounding environment that produces a higher insect density at the village periphery.
Numéro de notice :	A2011-605
Affiliation des auteurs :	COGIT+Ext (1988-2011)
Thématique :	GEOMATIQUE
Nature :	Article
nature-HAL :	ArtAvecCL-RevueIntern
DOI :	10.4081/gh.2011.156
Date de publication en ligne :	01/11/2011
En ligne :	https://doi.org/10.4081/gh.2011.156
Format de la ressource électronique :	URL article
Permalink :	https://documentation.ensg.eu/index.php?lvl=notice_display&id=91682

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IGN

Centre de documentationscientifique

Accueil

Sélection de la langue

Adresse

Se connecter

Actualité

L'actu ! Horaires du CDOS

Informations pratiques

IGN / ENSG

L'IGN a pour vocation

Accès directs

2014 -2024 IGN

Centre de documentation
scientifique