Effects of Local Anthropogenic Changes on Potential Malaria Vector<i>Anopheles hyrcanus</i>and West Nile Virus Vector<i>Culex modestus,</i>Camargue, France

Ponçon, Nicolas; Balenghien, Thomas; Toty, Céline; Ferré, Jean Baptiste; Thomas, Cyrille; Dervieux, Alain; L’Ambert, Grégory; Schaffner, Francis; Bardin, Olivier; Fontenille, Didier

doi:10.3201/eid1312.070730

Cited by 50 publications

(37 citation statements)

References 20 publications

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“…For instance, a study investigating a region in France from World War II to 1971 found that the populations of An. Hyrcanus , a vector with potential for malaria transmission, and of the West Nile Virus vector Culex modestus were initially very high in agricultural areas, decreasing after a few years owing to pesticide control in rice cultivation (Ponçon et al 2007). However, a number of factors caused the population of theses mosquitoes to increase again in 2000, raising the risk of malaria and WNV transmission.…”

Section: Discussionmentioning

confidence: 99%

Mosquitoes in degraded and preserved areas of the Atlantic Forest and potential for vector-borne disease risk in the municipality of São Paulo, Brazil

Ribeiro

Urbinatti

Duarte³

et al. 2012

Journal of Vector Ecology

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In order to assess the epidemiological potential of the Culicidae species in remaining areas of the Brazilian Atlantic Forest, specimens of this family were collected in wild and anthropic environments. A total of 9,403 adult mosquitoes was collected from May, 2009 to June, 2010. The most prevalent among species collected in the wild environment were Anopheles (Kerteszia) cruzii, the Melanoconion section of Culex (Melanoconion), and Aedes serratus, while the most common in the anthropic site were Coquillettidia chrysonotum/albifera, Culex (Culex) Coronator group, and An. (Ker.) cruzii. Mosquito richness was similar between environments, although the abundance of individuals from different species varied. When comparing diversity patterns between environments, anthropic sites exhibited higher richness and evenness, suggesting that environmental stress increased the number of favorable niches for culicids, promoting diversity. Increased abundance of opportunistic species in the anthropic environment enhances contact with culicids that transmit vector-borne diseases. Journal of Vector Ecology 37 (2): 316-324. 2012.

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Section: Discussionmentioning

confidence: 99%

Mosquitoes in degraded and preserved areas of the Atlantic Forest and potential for vector-borne disease risk in the municipality of São Paulo, Brazil

Ribeiro

Urbinatti

Duarte³

et al. 2012

Journal of Vector Ecology

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“…Indeed, deforestation was shown to have an impact on the biting rate of malaria vectors in South America (Vittor et al, 2006), and anthropogenic land use changes are associated with altered abundance of mosquito vectors for West Nile virus and malaria in France (Poncon et al, 2007). However, the studies focused on mosquito abundance rather than virus or parasite prevalence in the vectors.…”

Section: Introductionmentioning

confidence: 99%

Examining Landscape Factors Influencing Relative Distribution of Mosquito Genera and Frequency of Virus Infection

et al. 2009

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Mosquito-borne infections cause some of the most debilitating human diseases, including yellow fever and malaria, yet we lack an understanding of how disease risk scales with human-driven habitat changes. We present an approach to study variation in mosquito distribution and concomitant viral infections on the landscape level. In a pilot study we analyzed mosquito distribution along a 10-km transect of a West African rainforest area, which included primary forest, secondary forest, plantations, and human settlements. Variation was observed in the abundance of Anopheles, Aedes,Culex, and Uranotaenia mosquitoes between the different habitat types. Screening of trapped mosquitoes from the different habitats led to the isolation of five uncharacterized viruses of the families Bunyaviridae, Coronaviridae, Flaviviridae, and Rhabdoviridae, as well as an unclassified virus. Polymerase chain reaction screening for these five viruses in individual mosquitoes indicated a trend toward infection with specific viruses in specific mosquito genera that differed by habitat. Based on these initial analyses, we believe that further work is indicated to investigate the impact of anthropogenic landscape changes on mosquito distribution and accompanying arbovirus infection.

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“…The effect of changes in driver 3 led to unexpected results because the vector species in the Camargue has changed through history. Until the early 20th century, Anopheles atroparvus was the main malaria vector in the Camargue (Rodhain and Charmot, 1982;Ponçon et al, 2007c). Nowadays, this competent vector species became rare, whereas An.…”

Section: Discussionmentioning

confidence: 97%

Risk of Malaria Reemergence in Southern France: Testing Scenarios with a Multiagent Simulation Model

et al. 2009

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The Camargue, a region in southern France, is considered a potential site for malaria reemergence. All the suitable factors of the disease transmission system are present -- competent mosquito vectors, habitats for their breeding, and susceptible people -- except for the parasite. The objective of this study was to test potential drivers of malaria reemergence in this system after possible changes in biological attributes of vectors, agricultural practices, land use, tourism activities, and climate. Scenarios of plausible futures were formulated and then simulated using a spatially explicit and dynamic multiagent simulation: the MALCAM model. Scenarios were developed by varying the value of model inputs. Model outputs were compared based on the contact rate between people and potential malaria vectors, and the number of new infections in case of reintroduction of the parasite in the region. Model simulations showed that the risk of malaria reemergence is low in the Camargue. If the disease would reemerge, it would be the result of a combination of unfavorable conditions: introduction of a large population of infectious people or mosquitoes, combined with high levels of people-vector contacts resulting from significant changes in land use, tourism activities, agricultural policies, biological evolution of mosquitoes, and climate changes. The representation in the MALCAM model of interactions and feedbacks between different agents, and between agents and their environment, led in some cases to counterintuitive results. Results from scenario analyses can help local public health authorities in policy formulation.

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Effects of Local Anthropogenic Changes on Potential Malaria VectorAnopheles hyrcanusand West Nile Virus VectorCulex modestus,Camargue, France

Abstract: Sixty years of environmental modifications have led to strong and rapid effects on the abundance of vector populations.

Cited by 50 publications

References 20 publications

Mosquitoes in degraded and preserved areas of the Atlantic Forest and potential for vector-borne disease risk in the municipality of São Paulo, Brazil

Mosquitoes in degraded and preserved areas of the Atlantic Forest and potential for vector-borne disease risk in the municipality of São Paulo, Brazil

Examining Landscape Factors Influencing Relative Distribution of Mosquito Genera and Frequency of Virus Infection

Risk of Malaria Reemergence in Southern France: Testing Scenarios with a Multiagent Simulation Model

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