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What evidence exists on the impact of specific ecosystem components and functions on infectious diseases? A systematic map

Lugassy L., Amdouni-Boursier L., Alout H., Berrebi R., Boëte C., Boué F., Boulanger N., Durand T., De Garine-Wichatitsky M., Larrat S., Moinet M., Moulia C., Pagès Martinez N., Plantard O., Robert V., Livoreil B.. 2021. Environmental Evidence, 10 (1) : 31 p..

DOI: 10.1186/s13750-021-00220-4

Background: The control and prevention of vector-borne and zoonotic diseases is often based on the reduction of host or vector populations, involving but not limited to preventative culling and use of insecticides. Yet, destructive interventions such as these have shown several limitations including ineffectiveness on arthropods and negative impacts on ecosystems. An alternative strategy would be to rely on the natural ecosystem functions and their careful management to regulate such diseases. The goal of our work was to evaluate existing scientific evidence on potential links between ecosystem components/functions and 14 vector-borne and zoonotic diseases impacting human health and answer the question: “What evidence exists on the impact of specific ecosystem components and functions on infectious diseases?”. Methods: We searched for scientific articles published in English and French and screened them in a 3-round process (title, abstract and full-text). Articles were retained, without any geographical limitation, if they matched the following eligibility criteria: an exposure/intervention linked to changes in biological communities, habitats, or landscapes; an outcome consisting of any measure of infection in vector, animal or human hosts; and the presence of a comparator, in time and/or in space. The results are presented as a systematic map, followed by a narrative review where the amount of papers allowed for synthesis. Results: Searches in 5 scientific publication databases allowed to retrieve 9723 unique articles, among which 207 were retained after the screening process. The amount of relevant literature was highly variable depending on diseases, and the types of exposures also varied greatly among studies focusing on the same disease. A hundred articles presented in the map were unique in their “disease x exposure” combination and thus not eligible for further narrative description. The remaining 107 articles were organized in 34 “disease x exposure” group

Mots-clés : écosystème; transmission des maladies; maladie transmise par vecteur; maladie infectieuse; zoonose; dégradation de l'environnement; impact sur l'environnement; one health

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