Influence of land use and host species on parasite richness, prevalence and co-infection patterns.
Anthropogenic changes
Avian haemosporidian epizootiology
Deforestation
Landscape parasitology
Vector-borne disease
Journal
International journal for parasitology
ISSN: 1879-0135
Titre abrégé: Int J Parasitol
Pays: England
ID NLM: 0314024
Informations de publication
Date de publication:
01 2021
01 2021
Historique:
received:
27
04
2020
revised:
21
07
2020
accepted:
04
08
2020
pubmed:
13
10
2020
medline:
12
10
2021
entrez:
12
10
2020
Statut:
ppublish
Résumé
Tropical forests are experiencing increasing impacts from a multitude of anthropogenic activities such as logging and conversion to agricultural use. These perturbations are expected to have strong impacts on ecological interactions and on the transmission dynamics of infectious diseases. To date, no clear picture of the effects of deforestation on vector-borne disease transmission has emerged. This is associated with the challenge of studying complex systems where many vertebrate hosts and vectors co-exist. To overcome this problem, we focused on an innately simplified system - a small oceanic island (São Tomé, Gulf of Guinea). We analyzed the impacts of human land-use on host-parasite interactions by sampling the bird community (1735 samples from 30 species) in natural and anthropogenic land use at different elevations, and screened individuals for haemosporidian parasites from three genera (Plasmodium, Haemoproteus, Leucocytozoon). Overall, Plasmodium had the highest richness but the lowest prevalence, while Leucocytozoon diversity was the lowest despite having the highest prevalence. Interestingly, co-infections (i.e. intra-host diversity) involved primarily Leucocytozoon lineages (95%). We also found marked differences between bird species and habitats. Some bird species showed low prevalence but harbored high diversity of parasites, while others showed high prevalence but were infected with fewer lineages. These infection dynamics are most likely driven by host specificity of parasites and intrinsic characteristics of hosts. In addition, Plasmodium was more abundant in disturbed habitats and at lower elevations, while Leucocytozoon was more prevalent in forest areas and at higher elevations. These results likely reflect the ecological requirements of their vectors: mosquitoes and black flies, respectively.
Identifiants
pubmed: 33045239
pii: S0020-7519(20)30274-5
doi: 10.1016/j.ijpara.2020.08.005
pii:
doi:
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
83-94Informations de copyright
Copyright © 2020 Australian Society for Parasitology. Published by Elsevier Ltd. All rights reserved.