Molecular detection of visceral leishmaniasis in dogs from Barão de Melgaço, Pantanal region of Mato Grosso, Brazil1

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Abstract

The increasing expansion of visceral leishmaniasis (VL) in the Brazilian territory evidences the need for studies focused on the main reservoir of this parasite: The dog. This study aimed to conduct an epidemiological survey in the municipality of Barão de Melgaço, Pantanal region of the state of Mato Grosso (MT), Brazil. Conventional polymerase chain reaction (PCR) and qualitative SYBR®Green real-Time PCR (qPCR) were used to diagnose canine VL (CVL) and characterize the factors associated with this infection. Of the 402 dogs that had blood samples collected, 31 presented the parasite DNA, representing a prevalence of 7.71% in the population studied. Positivity indices for PCR and qPCR were 3.48 (14/402) and 7.21% (29/402), respectively. Comparison of the results obtained by both techniques showed moderate agreement (Kappa = 0.5364). Of the independent variables analyzed, presence of clinical signs (p 0.05) was the only one associated with CVL. Based on this study, we conclude that VL is a circulating disease, with relatively low prevalence, in dogs of Barão de Melgaço/MT, and that the presence of clinical signs is the only variable associated with canine infection.

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Dias, Á. F. L. R., Almeida, A. B. P. F., Nakazato, L., & Sousa, V. R. F. (2021). Molecular detection of visceral leishmaniasis in dogs from Barão de Melgaço, Pantanal region of Mato Grosso, Brazil1. Pesquisa Veterinaria Brasileira. Colegio Brasileiro de Patologia Animal. https://doi.org/10.1590/1678-5150-PVB-6485

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