L'environnement socio-spatial comme facteur d'émergence des maladies infectieuses

Taglioni, François; Dehecq, Jean-Sébastien

doi:10.4000/echogeo.11168

Cited by 9 publications

(8 citation statements)

References 27 publications

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Section: Discussionsupporting

confidence: 90%

“…The impact of individual house was found consistent with the findings of two other studies conducted on Reunion island [ 35 , 38 ]. Thus, in the three abovementioned clusters involved in the emergence, age, density and surface of the dwelling increased risk [ 35 ]. Moreover, makeshift constructions and the absence of window screens were associated with infection, consistent with other observations [ 14 – 16 ].…”

Section: Discussionsupporting

confidence: 90%

“…It has been well documented, both in urban and rural environments. This neighbourhood effect on CHIKV transmission dynamic was reported in three clusters investigated during the first epidemic wave in Reunion island [ 35 ], and is supported by mapping of participant's residencies revealing spatial heterogeneity of risk (data not shown). This influence of neighbourhood was later confirmed in Singapore [ 36 ].…”

Section: Discussionsupporting

confidence: 66%

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Individual and contextual risk factors for chikungunya virus infection: the SEROCHIK cross-sectional population-based study

Fred¹,

Fianu²,

Béral

et al. 2018

Epidemiol. Infect.

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The purpose of the study was to weigh the community burden of chikungunya determinants on Reunion island. Risk factors were investigated within a subset of 2101 adult persons from a population-based cross-sectional serosurvey, using Poisson regression models for dichotomous outcomes. Design-based risk ratios and population attributable fractions (PAF) were generated distinguishing individual and contextual (i.e. that affect individuals collectively) determinants. The disease burden attributable to contextual determinants was twice that of individual determinants (overall PAF value 89.5% vs. 44.1%). In a model regrouping both categories of determinants, the independent risk factors were by decreasing PAF values: an interaction term between the reporting of a chikungunya history in the neighbourhood and individual house (PAF 45.9%), a maximal temperature of the month preceding the infection higher than 28.5 °C (PAF 25.7%), a socio-economically disadvantaged neighbourhood (PAF 19.0%), altitude of dwelling (PAF 13.1%), cumulated rainfalls of the month preceding the infection higher than 65 mm (PAF 12.6%), occupational inactivity (PAF 11.6%), poor knowledge on chikungunya transmission (PAF 7.3%) and obesity/overweight (PAF 5.2%). Taken together, these covariates and their underlying causative factors uncovered 80.8% of chikungunya at population level. Our findings lend support to a major role of contextual risk factors in chikungunya virus outbreaks.

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Section: Discussionsupporting

confidence: 90%

Section: Discussionsupporting

confidence: 90%

Section: Discussionsupporting

confidence: 66%

See 1 more Smart Citation

Individual and contextual risk factors for chikungunya virus infection: the SEROCHIK cross-sectional population-based study

Fred¹,

Fianu²,

Béral

et al. 2018

Epidemiol. Infect.

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“…In 2011, it became an overseas French department, which may stimulate more rapid development of the islands (Taglioni and Dehecq 2009), increasing the urbanized area. Mayotte is comprised of two islands 1 km apart, Grande Terre and Petite Terre.…”

Section: Study Areas and Collection Sitesmentioning

confidence: 99%

Spread of invasive Aedes albopictus and decline of resident Aedes aegypti in urban areas of Mayotte 2007–2010

et al. 2012

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The invasive Asian tiger mosquito, Aedes albopictus, has been established on the French overseas island of Mayotte in the Indian Ocean since 2007. Despite the presence of a resident population of Aedes aegypti, Ae. albopictus has expanded its presence in urban areas, in contrast to the pattern of invasion by this mosquito elsewhere in the world. We undertook a comparative study of the distribution and abundance of Ae. albopictus and Ae. aegypti populations between 2007 and 2010 in different types of urban landscapes to document the invasion process. Urban and suburban areas at five localities on Mayotte were selected and ten houses with mosquito-infested larval habitats on the property were located in each area. To calculate variables that might explain mosquito infestation, the areas around the houses selected were overlaid on maps with grid cells (each 25 9 25 m) and the areas inside grid cells were analyzed to define landscape characteristics (percentage of built on land and human density) that might be predictive of Ae. albopictus presence and abundance. The proportion of sites occupied by only Ae. albopictus and the relative abundance of this species relative to total Aedes larvae and pupae significantly increased between 2007 and 2010, in both urban and in rural areas. In the 2010 survey, the number of larval habitats occupied by Ae. aegypti in the sampled area decreased sharply compared to 2007. The proportion of land with paved or hard surfaces (roads, buildings, hereafter ''built-up area''), the increase of urbanized areas between 2003 and 2008, and the density of human residents were all correlated with higher relative abundance of Ae. albopictus. The urban areas of Mayotte have significant amounts of vegetation even in the more densely populated areas, and this factor may have facilitated the invasion of Ae. albopictus by providing abundant adult resting sites. These findings are relevant for vector control strategies and forecasting the success of invasions of Ae. albopictus in urban areas in other countries.

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“…Par ailleurs, le comportement des individus et leur environnement, dont la morphologie urbaine, sont des facteurs essentiels conditionnant le contact entre l'Homme et le moustique. Certains de ces facteurs ont été quantifiés et montrent que la densité de l'habitat individuel et le type de bâti sont à prendre en compte pour définir le risque d'exposition au vecteur à La Réunion [24]. La réussite de la LAV ne peut donc reposer sur les seules actions de lutte, mais doit être intégrée à l'implication de la population pour l'obtention de résultats [15].…”

Section: Renforcement Fondamental De La Collaboration Avec Les Partenunclassified

La réémergence du chikungunya à La Réunion en 2010: évolution des actions de lutte antivectorielle

Dehecq

Baville

Margueron

et al. 2010

Bull. Soc. Pathol. Exot.

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The re-emergence of local transmission of chikungunya virus caused by Aedes albopictus since March 2010 in the Réunion Island, French territory in the southwest Indian Ocean, calls for better epidemiological surveys, vector control, and community-based chikungunya control. This paper describes the strategy and the new ways of vector control applied since the last major chikungunya virus outbreak in 2005-2007, and the high levels of collaboration with mayors and local associations for community involvement. Between March 17, 2010 (first chikungunya case) and July 1, 2010, 313 cases were investigated, 13,036 premises inspected, and 34,393 premises concerned by spatial treatment. The traditional entomologic indices don't explain the distribution map of chikungunya cases, and many other factors have to be measured for evaluating the risk of transmission, such as lifestyle, habitat, and the kind of environment the people live in. A big information campaign was conducted beside the implementation of traditional mosquito control techniques. The two themes of this campaign are environmental management and individual protection, considered as important components of chikungunya prevention. The outcome of the mosquito control strategy demonstrates that community participation is not enough, and more studies are required to define new ways of communication for promoting community-oriented activities to prevent chikungunya epidemics.

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L'environnement socio-spatial comme facteur d'émergence des maladies infectieuses

Cited by 9 publications

References 27 publications

Individual and contextual risk factors for chikungunya virus infection: the SEROCHIK cross-sectional population-based study

Individual and contextual risk factors for chikungunya virus infection: the SEROCHIK cross-sectional population-based study

Spread of invasive Aedes albopictus and decline of resident Aedes aegypti in urban areas of Mayotte 2007–2010

La réémergence du chikungunya à La Réunion en 2010: évolution des actions de lutte antivectorielle

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