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Studies of host-parasite relationships largely benefit from adopting a multifactorial approach, including the complexity of multi-host systems and habitat features in their analyses. Some host species concentrate most infection and contribute disproportionately to parasite and vector population maintenance, and habitat feature variation creates important heterogeneity in host composition, influencing infection risk and the fate of disease dynamics. Here, we examine how the availability of specific groups of hosts and habitat features relate to vector abundance and infection risk in 18 vector populations along the Mediterranean-type ecosystem of South America, where the kissing bug Mepraia spinolai is the main wild vector of the parasite Trypanosoma cruzi, the etiological agent of Chagas disease. For each population, data on vectors, vertebrate host availability, vegetation, precipitation, and temperature were collected and analyzed. Vector abundance was positively related to temperature, total vegetation, and European rabbit availability. Infection risk was positively related to temperature, bromeliad cover, and reptile availability; and negatively to the total domestic mammal availability. The invasive rabbit is suggested as a key species involved in the vector population maintenance. Interestingly, lizard species -a group completely neglected as a potential reservoir-, temperature, and bromeliads were relevant factors accounting for infection risk variation across populations.

Titel:	Lizards and rabbits may increase Chagas infection risk in the Mediterranean-type ecosystem of South America.
Autor/in / Beteiligte Person:	San Juan, E ; Araya-Donoso, R ; Sandoval-Rodríguez, A ; Yáñez-Meza, A ; Quiroga, N ; Botto-Mahan, C
Link:	Volltext (PDF)
Zeitschrift:	Scientific reports, Jg. 10 (2020-02-05), Heft 1, S. 1853
Veröffentlichung:	London : Nature Publishing Group, copyright 2011-, 2020
Medientyp:	academicJournal
ISSN:	2045-2322 (electronic)
DOI:	10.1038/s41598-020-59054-8
Schlagwort:	Animals Ecosystem Host-Parasite Interactions physiology Insect Vectors parasitology Mammals parasitology Rabbits Risk South America Temperature Triatominae parasitology Trypanosoma cruzi pathogenicity Chagas Disease etiology Chagas Disease parasitology Lizards parasitology
Sonstiges:	Nachgewiesen in: MEDLINE Sprachen: English Publication Type: Journal Article; Research Support, Non-U.S. Gov't Language: English [Sci Rep] 2020 Feb 05; Vol. 10 (1), pp. 1853. <i>Date of Electronic Publication: </i>2020 Feb 05. MeSH Terms: Chagas Disease / etiology ; Chagas Disease / parasitology ; Lizards / *parasitology ; Animals ; Ecosystem ; Host-Parasite Interactions / physiology ; Insect Vectors / parasitology ; Mammals / parasitology ; Rabbits ; Risk ; South America ; Temperature ; Triatominae / parasitology ; Trypanosoma cruzi / pathogenicity References: Swei, A., Meentemeyer, R. & Briggs, C. J. Influence of abiotic and environmental factors on the density and infection prevalence of Ixodes pacificus (Acari: Ixodidae) with Borrelia burgdorferi. J. Med. Entomol. 48, 20–28 (2011). (PMID: 10.1603/ME10131) ; Gottdenker, N. L., Chaves, L. F., Calzada, J. E., Saldaña, A. & Carroll, C. R. 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Lizards and rabbits may increase Chagas infection risk in the Mediterranean-type ecosystem of South America.