Rickettsia tillamookensis-like strain in brown dog ticks in Brazil

Parasites & Vectors 2026 Open access

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Authors: Lucas Lisboa Nunes Bonifácio, Kamila Gaudêncio da Silva Sales, Ennya Rafaella Neves Cardoso, Felipe da Silva Krawczak, Filipe Dantas‐Torres
DOI: 10.1186/s13071-026-07290-8
Cited by: 1
References: 16

Abstract

Brown dog ticks (Rhipicephalus linnaei) collected from dogs in northeastern Brazil in 2015 tested positive for a rickettsial organism phylogenetically related to Rickettsia tillamookensis (referred to as R. tillamookensis-like). One of the dogs with R. tillamookensis-like-positive ticks tested positive for IgG antibodies to Rickettsia rickettsii antigens, suggesting a potential reaction to spotted fever group rickettsiae. Future research should assess whether the rickettsia detected herein is R. tillamookensis or a closely related species, its distribution, potential vectors, and possible pathogenicity to humans.

Fields of Study & Subjects

Vector-borne infectious diseases Bartonella species infections research Leptospirosis research and findings

Publication details

Journal / source
Parasites & Vectors
Publisher
Springer Science and Business Media LLC
Volume
19
Issue
1
Publication date
19 February 2026
Language
EN