Hemoparasitos de anfíbios anuros da Amazônia Oriental

Abstract

This study aimed to describe the first record of Trypanosoma sp. in Rhinella major as a new host and to analyze the relationship between hemoparasites and hematological and biochemical parameters of anuran amphibians collected in the eastern Amazon. Two chapters were produced for the present study. In the first chapter, 44 specimens of Rhinella major were captured in the area of influence of the Curua-una hydroelectric plant, in Santarém, west of Pará. Trypanosoma sp. with only one morphotype found. The prevalence, average intensity and average abundance rates were relatively low when compared with similar studies. In this study, we identified R. major as a new vertebrate host for Trypanosoma sp. in Brazil. In the second chapter, 32 specimens of Leptodactylus macrosternum and 20 specimens of Rhinella major were captured from anthropized environments in the western state of Pará, Brazil. After looking for and quantified hemoparasites under a light microscope, statistical tests were carried out in order to verify relationships between the abundance of parasites found and changes in the hematological and biochemical parameters analyzed. The analyzes revealed high rates of parasitic prevalence, with a record of mixed infections, with the presence of up to three hemoparasites (Trypanosoma sp., Hepatozoon sp. And microfilariae). Mann-Whitney tests did not reveal differences between the parameters analyzed. It was possible to detect correlations between Trypanosoma sp. and hematocrit and Hepatozoon sp. with glucose levels. Linear regression revealed that there is a significant negative relationship (p <0.05) for hemoparasites Trypanosoma sp. and Hepatozoon sp. with hematocrit levels.