Vector species richness predicts local mortality rates from Chagas disease.

Autor: Silva GGD; Lestes Laboratory, Center of Entomology and Experimental Biology, Federal University of Triangulo Mineiro - UFTM, Uberaba, MG, Brazil; Federal University of Sao Carlos - UFSCar, São Carlos, SP, Brazil., Lopez VM; Lestes Laboratory, Center of Entomology and Experimental Biology, Federal University of Triangulo Mineiro - UFTM, Uberaba, MG, Brazil; Graduate Program in Entomology, University of Sao Paulo - USP, Ribeirão Preto, SP, Brazil., Vilarinho AC; Federal University of Sao Carlos - UFSCar, São Carlos, SP, Brazil; Health Sciences Institute, Federal University of Triangulo Mineiro - UFTM, Uberaba, MG, Brazil., Datto-Liberato FH; Lestes Laboratory, Center of Entomology and Experimental Biology, Federal University of Triangulo Mineiro - UFTM, Uberaba, MG, Brazil; Graduate Program in Entomology, University of Sao Paulo - USP, Ribeirão Preto, SP, Brazil., Oliveira CJF; Graduate Program in Tropical Medicine and Infectiology, Department of Natural and Biological Sciences, Federal University of Triangulo Mineiro - UFTM, Uberaba, MG, Brazil., Poulin R; Department of Zoology, University of Otago, PO Box 56, Dunedin 9054, New Zealand., Guillermo-Ferreira R; Lestes Laboratory, Center of Entomology and Experimental Biology, Federal University of Triangulo Mineiro - UFTM, Uberaba, MG, Brazil; Federal University of Sao Carlos - UFSCar, São Carlos, SP, Brazil; Graduate Program in Entomology, University of Sao Paulo - USP, Ribeirão Preto, SP, Brazil; Graduate Program in Tropical Medicine and Infectiology, Department of Natural and Biological Sciences, Federal University of Triangulo Mineiro - UFTM, Uberaba, MG, Brazil. Electronic address: rhainer.ferreira@uftm.edu.br.
Jazyk: angličtina
Zdroj: International journal for parasitology [Int J Parasitol] 2024 Mar; Vol. 54 (3-4), pp. 139-145. Date of Electronic Publication: 2023 Nov 07.
DOI: 10.1016/j.ijpara.2023.10.002
Abstrakt: Vector species richness may drive the prevalence of vector-borne diseases by influencing pathogen transmission rates. The dilution effect hypothesis predicts that higher biodiversity reduces disease prevalence, but with inconclusive evidence. In contrast, the amplification effect hypothesis suggests that higher vector diversity may result in greater disease transmission by increasing and diversifying the transmission pathways. The relationship between vector diversity and pathogen transmission remains unclear and requires further study. Chagas disease is a vector-borne disease most prevalent in Brazil and transmitted by multiple species of insect vectors of the subfamily Triatominae, yet the drivers of spatial variation in its impact on human populations remain unresolved. We tested whether triatomine species richness, latitude, bioclimatic variables, human host population density, and socioeconomic variables predict Chagas disease mortality rates across over 5000 spatial grid cells covering all of Brazil. Results show that species richness of triatomine vectors is a good predictor of mortality rates caused by Chagas disease, which supports the amplification effect hypothesis. Vector richness and the impact of Chagas disease may also be driven by latitudinal components of climate and human socioeconomic factors. We provide evidence that vector diversity is a strong predictor of disease prevalence and give support to the amplification effect hypothesis.
(Copyright © 2023 Australian Society for Parasitology. Published by Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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