The Influence of Abiotic and Biotic Variables on the Patent Parasitemias of Trypanosoma Spp. in Thrichomys Fosteri (Rodentia: Echimyidae) in the Southern Pantanal

Overview

Journal Parasitol Res

Specialty Parasitology

Date 2022 Apr 18

PMID 35435514

Authors

Filipe Martins Santos

Nayara Yoshie Sano

Sany Caroline Liberal

Wesley Arruda Gimenes Nantes

Isabel Passos Miranda Sanabria

Geovanna Silva Dos Santos

Artur Luiz Araujo Martinelli

Carina Elisei de Oliveira

Mauricio Almeida-Gomes

Ana Maria Jansen

Heitor Miraglia Herrera

Affiliations

Soon will be listed here.

Abstract

Parasitism is a dynamic ecological phenomenon that is constantly influenced by the environment and intrinsic factors of the host. We aimed to evaluate the influence of vegetation, environmental temperature, reproductive conditions, sex, and body condition (BC) on the detection of Trypanosoma spp. in the blood of Thrichomys fosteri in the Pantanal region, an enzootic area for trypanosomiasis. Whole blood was collected from the tip of the tail, and nPCR was performed for Trypanosoma spp. detection from the DNA extracted from the resultant blood clot. Statistical analyses were performed using generalized linear models. Our results showed that there is a greater probability of detection of Trypanosoma spp. in the bloodstream of animals with the highest BC values in periods with mild temperatures. Since T. fosteri is an abundant and common prey for carnivores, even in periods with low temperatures and consequent decrease in the reproduction and activities of the blood-sucking arthropod vectors, the maintenance of Trypanosoma spp. in the studied area would be guaranteed via predation (trophic network) of T. fosteri individuals with good BC and patent parasitemia. Furthermore, T. fosteri, which displays Trypanosoma spp. in the bloodstream, would be reproducing adequately because we found no influence between the reproductive condition and the detection of Trypanosoma spp. in T. fosteri. The caviomorph rodent T. fostei is an important species for the maintenance of Trypanosoma spp. in the Pantanal biome.

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