High Parasitic Loads Quantified in Sylvatic Triatoma melanica, a Chagas Disease Vector

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Autor(es): dc.contributorInstituto René Rachou-Fiocruz Minas Gerais-
Autor(es): dc.contributorInstituto Oswaldo Cruz/Fiocruz-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorValença-Barbosa, Carolina-
Autor(es): dc.creatorFinamore-Araujo, Paula-
Autor(es): dc.creatorMoreira, Otacílio Cruz-
Autor(es): dc.creatorAlvarez, Marcus Vinicius Niz-
Autor(es): dc.creatorBorges-Veloso, André-
Autor(es): dc.creatorBarbosa, Silvia Ermelinda-
Autor(es): dc.creatorDiotaiuti, Liléia-
Autor(es): dc.creatorde Souza, Rita de Cássia Moreira-
Data de aceite: dc.date.accessioned2025-08-21T23:21:27Z-
Data de disponibilização: dc.date.available2025-08-21T23:21:27Z-
Data de envio: dc.date.issued2023-07-29-
Data de envio: dc.date.issued2023-07-29-
Data de envio: dc.date.issued2022-11-30-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.3390/pathogens11121498-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/246534-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/246534-
Descrição: dc.descriptionTriatoma melanica is a sylvatic vector species in Brazil. In We aimed to characterize the Trypanosoma cruzi discrete typing units (DTUs), the parasitic loads, and the blood meal sources of insects collected in rocky outcrops in rural areas in the state of Minas Gerais. An optical microscope (OM) and kDNA-PCR were used to examine natural infection by T. cruzi, and positive samples were genotyped by conventional multilocus PCR. Quantification of the T. cruzi load was performed using qPCR, and the blood meal sources were identified by Sanger sequencing the 12S rRNA gene. A total of 141 T. melanica were captured. Of these, ~55% (61/111) and ~91% (63/69) were positive by OM and KDNA-PCR, respectively. We genotyped ~89% (56/63) of the T. cruzi-positive triatomines, with TcI (~55%, 31/56) being the most prevalent DTU, followed by TcIII (~20%, 11/56) and TcII (~7%, 4/56). Only TcI+TcIII mixed infections were detected in 10 (~18%) specimens. A wide range of variation in the parasitic loads of T. melanica was observed, with an overall median value of 104 parasites/intestine, with females having higher T. cruzi loads than N2, N4, and N5. TcII showed lower parasitic loads compared to TcI and TcIII. The OM positive diagnosis odds ratio between T. cruzi infection when the parasite load is 107 compared to 103 was approximately 29.1. The most frequent blood meal source was Kerodon rupestris (~58%), followed by Thrichomys apereoides (~18%), Wiedomys cerradensis (~8%), Galactis cuja (~8%) and Gallus gallus (~8%). Our findings characterize biological and epidemiological aspects of the sylvatic population of T. melanica in the study area, highlighting the need to extend surveillance and control to this vector.-
Descrição: dc.descriptionGrupo Triatomíneos Instituto René Rachou-Fiocruz Minas Gerais, Minas Gerais-
Descrição: dc.descriptionPlataforma de PCR em Tempo Real RPT09A Laboratório de Virologia Molecular Instituto Oswaldo Cruz/Fiocruz-
Descrição: dc.descriptionInstituto de Biotecnologia de Botucatu Universidade Estadual Paulista-
Descrição: dc.descriptionInstituto de Biotecnologia de Botucatu Universidade Estadual Paulista-
Idioma: dc.languageen-
Relação: dc.relationPathogens-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectblood-feeding behavior-
Palavras-chave: dc.subjectbrasiliensis complex-
Palavras-chave: dc.subjecttriatomine-
Palavras-chave: dc.subjectTrypanosoma cruzi-
Título: dc.titleHigh Parasitic Loads Quantified in Sylvatic Triatoma melanica, a Chagas Disease Vector-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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