Bárbara Weck

Universidade de São Paulo

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Marcelo B. Labruna

Fundação de Estudo e Pesquisa em Medicina Veterinária e Zootecnia

José Reck

Secretaria de Agricultura e Abastecimento

Bruno Dall’Agnol

Secretaria de Agricultura e Abastecimento

Ugo Araújo Souza

Universidade Federal do Rio Grande do Sul

Ricardo Marcondes Martins

Universidade do Porto

Sebastián Muñoz‐Leal

University of Concepción

Anelise Webster

Secretaria de Agricultura e Abastecimento

Francisco B. Costa

Universidade Estadual do Maranhão

Carlos Alexandre Sanchez Ferreira

Pontifícia Universidade Católica do Rio Grande do Sul

María Carolina A. Serpa

Universidade de São Paulo

Cooperative Institutions

Universidade de São Paulo

Universidade Federal do Rio Grande do Sul

Museu de Ciências Naturais da Fundação Zoobotânica do Rio Grande do Sul

Universidade Brasil

Secretaria de Agricultura e Abastecimento

Universidade Cidade de São Paulo

Universidade Federal do Pampa

Universidade Estadual do Ceará

Fundação Estadual de Pesquisa Agropecuária

Universidade Federal de Goiás

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Description of Amblyomma monteiroae n. sp. (Acari: Ixodidae), a parasite of the great horned owl (Strigiformes: Strigidae) in southern Brazil

Ticks and Tick-borne Diseases (2023)

João Fábio Soares Marcelo B. Labruna Derek Blaese de Amorim Vinícius Baggio-Souza Renata Fagundes‐Moreira

In 2020, adult hard ticks (males and females) were collected from great horned owls [Bubo virginianus (Gmelin, 1788)] in the coastal region in southern Brazil. The engorged females were allowed to oviposit in the laboratory and hatched larvae could be obtained. Analyses of the external morphology of the adult ticks revealed that they represent a new species, which was named Amblyomma monteiroae n. sp. Partial sequences of the mitochondrial 16S rRNA gene and the nuclear second internal transcribed spacer (ITS2) were generated from a male and a female. Their 16S rRNA haplotypes were identical to each other and closest (96% identity) to corresponding sequences of Amblyomma parvitarsum Neumann, 1901, and 90% identical to Amblyomma neumanni Ribaga, 1902. Their ITS2 haplotypes were 95.8 to 96.0 identical to the single ITS-2 partial sequence of A. parvitarsum available in GenBank. In the phylogenetic trees inferred by both 16S rRNA and ITS2 partial sequences, A. monteiroae n. sp. formed a clade with A. parvitarsum, with A. neumanni branching sister to this clade. Amblyomma monteiroae n. sp. is genetically and morphologically related to A. parvitarsum. Both tick species are unique in combining the following morphological characters: scutum extensively ornate; eyes rounded and bulging; coxa I with two moderate pointed spurs, the external longer than the internal; a single triangular short spur on coxae II-III; presence of two spines on the tibia of legs II-IV; hypostomal dentition 3/3, trochanters without spurs. However, the males of the two species can be separated by specific features in palps and festoons, whereas the females differ in specific features of the coxal spurs. The larva of A. monteiroae n. sp. can be morphologically distinguished from A. parvitarsum only by morphometry, with the former species being slightly smaller. Currently, A. monteiroae n. sp. is restricted to southern Brazil, and the only known host is B. virginianus (Strigiformes: Strigidae). The present study increases the Amblyomma Brazilian fauna to 34 species.

Amblyomma

10.1016/j.ttbdis.2023.102239

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Citations (9)

Small mammals, ticks and rickettsiae in natural and human-modified landscapes: Diversity and occurrence of Brazilian spotted fever in Brazil

Ticks and Tick-borne Diseases (2021)

Maria Carolina de Azevedo Serpa Hermes Ribeiro Luz Francisco B. Costa Bárbara Weck Hector Ribeiro Benatti

Rickettsia rickettsii

10.1016/j.ttbdis.2021.101805

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Citations (19)

Rickettsia parkeri in the Pampa biome of southern Brazil: Isolation, molecular characterization, and serological evidence of canine infection

Veterinary Parasitology Regional Studies and Reports (2020)

Bárbara Weck Felipe da Silva Krawczak Francisco B. Costa Bruno Dall’Agnol Arlei Marcili

Rhipicephalus sanguineus

10.1016/j.vprsr.2020.100448

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Citations (10)

Molecular survey of Rickettsia spp. in the Neotropical deer tick Haemaphysalis juxtakochi from Brazilian Pampa

Parasitology Research (2018)

Ugo Araújo Souza Bruno Dall’Agnol Thaís Michel Anelise Webster Bárbara Weck

Haemaphysalis

Tick-borne disease

Rhipicephalus

10.1007/s00436-018-5996-2

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Citations (11)

>b<Pesquisa de hemoparasitas transmitidos por carrapatos em pequenos mamíferos nos estados de São Paulo e Mato Grosso do Sul>/b<

Bárbara Weck

DNA detectável paraBabesia spp.

10.11606/t.10.2022.tde-25042022-082923

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Citations (0)

Febre maculosa brasileira no estado de São Paulo

Boletim APAMVET (2021)

Lina C. Binder Maria Carolina de Azevedo Serpa Bárbara Weck Glauber Meneses Barboza de Oliveira Isabella Pereira Pesenato

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Borrelia burgdorferi sensu lato in Ixodes longiscutatus ticks from Brazilian Pampa

Ticks and Tick-borne Diseases (2017)

Bruno Dall’Agnol Thaís Michel Bárbara Weck Ugo Araújo Souza Anelise Webster

Borrelia afzelii

Borrelia garinii

Sensu

10.1016/j.ttbdis.2017.08.003

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Citations (27)

Rickettsia parkeri in free-ranging wild canids from Brazilian Pampa

Transboundary and Emerging Diseases (2017)

Bruno Dall’Agnol Ugo Araújo Souza Bárbara Weck Tatiane Campos Trigo Márcia Maria de Assis Jardim

Spotted fevers are tick-borne diseases associated with various Rickettsia species. Rickettsia parkeri sensu stricto (s.s.) is the agent of an emerging eschar-associated rickettsiosis in humans from the USA and South American Pampa. Considering that R. parkeri s.s. is restricted to Americas and the potential role of dogs in the epidemiology of the disease, it is thus reasonable to hypothesize that wild canids could be involved in the enzootic cycle of this rickettsiosis. The aim of this work was to investigate the potential role of the wild canids from Pampa, Cerdocyon thous (crab-eating fox) and Lycalopex gymnocercus (Pampas fox), in the ecology of R. parkeri s.s. For that, 32 live-trapped free-ranging wild canids were sampled. Ticks were observed in 30 of the 32 foxes. Of the 292 ticks collected, 22 (7.5%) were positive by PCR for the presence of R. parkeri s.s. DNA. Also, 20 (62%) wild canids showed antibodies against R. parkeri. The results suggest that wild canids are involved in the enzootic cycle of R. parkeri s.s. in the Pampa biome and could be responsible for pathogen (and its vectors) dispersal.

Enzootic

10.1111/tbed.12743

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Citations (23)

Isolation and molecular characterization of a novel relapsing fever group Borrelia from the white-eared opossum Didelphis albiventris in Brazil

Current Research in Parasitology and Vector-Borne Diseases (2024)

Bárbara Weck Adriana Santodomingo María Carolina A. Serpa Glauber Meneses Barboza de Oliveira Felipe Rodrigues Jorge

This study aimed to detect, isolate and to characterize by molecular methods a relapsing fever group (RFG) Borrelia in white-eared opossums (Didelphis albiventris) from Brazil. During 2015–2018, when opossums (Didelphis spp.) were captured in six municipalities of the state of São Paulo, Brazil, molecular analyses revealed the presence of a novel RFG Borrelia sp. in the blood of seven opossums (Didelphis albiventris), out of 142 sampled opossums (4.9% infection rate). All seven infected opossums were from a single location (Ribeirão Preto municipality). In a subsequent field study in Ribeirão Preto during 2021, two new opossums (D. albiventris) were captured, of which one contained borrelial DNA in its blood. Macerated tissues from this infected opossum were inoculated into laboratory animals (rodents and rabbits) and two big-eared opossums (Didelphis aurita), which had blood samples examined daily via dark-field microscopy. No spirochetes were visualized in the blood of the laboratory animals. Contrastingly, spirochetes were visualized in the blood of the two D. aurita opossums between 12 and 25 days after inoculation. Blood sample from these opossums were used for a multi-locus sequencing typing (MLST) based on six borrelial loci. Phylogenies inferred from MLST genes positioned the sequenced Borrelia genotype into the RFG borreliae clade basally to borreliae of the Asian-African group, forming a monophyletic group with another Brazilian isolate, "Candidatus B. caatinga". Based on this concatenated phylogenetic analysis, which supports that the new borrelial isolate corresponds to a putative new species, we propose the name "Candidatus Borrelia mimona".

Didelphis

Multilocus sequence typing

10.1016/j.crpvbd.2024.100193

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Citations (2)

Natural infection and molecular detection of Cytauxzoon felis in a free-ranging Puma concolor in the state of Goiás, Brazil

Ciência Rural (2022)

Luiza Gabriella Ferreira de Paula Bárbara Weck Lucianne Cardoso Neves Warley Vieira de Freitas Paula Luciana Batalha de Miranda Araújo

ABSTRACT: The puma (Puma concolor Linnaeus, 1771), the most widely distributed felid species in the Americas, can be found in all Brazilian biomes. Nevertheless, few studies have focused on hemoparasites in this species. Cytauxzoon felis, a hemoparasite that can infect domestic cats, has also been described in wild felids in Brazil. To the best of our knowledge, this study is the first to diagnose the natural infection and molecular detection of C. felis in a P. concolor in the state of Goiás. This animal presented non-regenerative anemia and inclusion suggestive of piroplasmids within red blood cells. The amplified 551 bp fragment of partial Piroplasmida 18S rRNA gene sequence was 100% identical to corresponding sequences of C. felis available in GenBank. No specific treatment for cytauxzoonosis was administered, and after rehabilitation, the animal was reintroduced into the wild. This finding provides some evidence that P. concolor may act as a natural host of the parasite. The epidemiology, vector and pathogenicity of this hemoparasite in wild and domestic cats in Brazil deserves further investigation.

Puma

10.1590/0103-8478cr20210577

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Citations (3)