Título:	Capybara (Hydrochoerus hydrochaeris) exposure to Rickettsia in the Federal District of Brazil, a non-endemic area for Brazilian spotted fever
Outros títulos:	Exposição de capivaras (Hydrochoerus hydrochaeris) à Rickettsia no Distrito Federal, área não endêmica para febre maculosa brasileira
Autor(es):	Quadros, Ana Paula Nunes de Rêgo, George Magno Sousa do Silva, Thamiris Figueiredo da Carvalho, Andréa de Moraes Binder, Thiago Fernandes Martins Lina de Campos Castro, Márcio Botelho de Mattos, Paulo Sérgio Ribeiro de Labruna, Marcelo Bahia Paludo, Giane Regina
ORCID:	http://orcid.org/0000-0002-9112-1718
Assunto:	Vetores artrópodes Febre maculosa Rickettsioses
Data de publicação:	28-Mai-2021
Editora:	Colégio Brasileiro de Parasitologia Veterinária
Referência:	QUADROS, Ana Paula Nunes de et al. Capybara (Hydrochoerus hydrochaeris) exposure to Rickettsia in the Federal District of Brazil, a non-endemic area for Brazilian spotted fever. Revista Brasileira de Parasitologia Veterinária, Jaboticabal, v. 30, n. 2 e028720, 2021. DOI: https://doi.org/10.1590/S1984-29612021035. Disponível em: https://doi.org/10.1590/S1984-29612021035. Epub 28 May 2021. Acesso em: 21 jun. 2021.
Abstract:	In this study, whole blood samples and ticks were collected from 57 capybaras in recreational areas in the Federal District, Brazil, aiming to investigate the presence of Rickettsia spp. using polymerase chain reaction (PCR) and indirect immunofluorescence (IFAT) assays. None of the capybara blood samples yielded rickettsial DNA by PCR. Among 55 capybara serum samples tested by IFAT, 53 (96.3%) reacted to Rickettsia spp. Among these, 21 (39.6%) identified the R. bellii antigen as the probable antigen involved in a homologous reaction (PAIHR), whereas 2 (3.8%) identified the R. parkeri antigen. Ticks collected from capybaras were identified as 173 Amblyomma sculptum and 410 A. dubitatum, in addition to nine Amblyomma spp. larvae. A sample of 231 ticks was subjected to DNA extraction and PCR for Rickettsia species. None of 122 A. sculptum yielded rickettsial DNA. Molecular evidence of R. bellii was found in 25/108 (23.1%) and of Rickettsia sp. strain Cooperi (R. parkeri-like agent) in 2/108 (1.9%) of the A. dubitatum samples. These results suggest a greater exposure to R. bellii in these capybara populations, in addition to a more significant number of A. dubitatum, which might characterize the Federal District region as not endemic for Brazilian spotted fever.
Unidade Acadêmica:	Faculdade de Agronomia e Medicina Veterinária (FAV)
Licença:	(CC BY) This is an Open Access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
DOI:	https://doi.org/10.1590/S1984-29612021035
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