Life cycle and vectorial competence of  Triatoma williami  (Galvão, Souza e Lima, 1965) under the influence of different blood meal sources

Lunardi, Rosaline Rocha; Gomes, Letícia Pinho; Câmara, Thaís Peres; Arrais-Silva, Wagner Welber

doi:10.1016/j.actatropica.2015.05.023

Cited by 6 publications

(3 citation statements)

References 49 publications

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“…This feature suggests that triatomines can easily adapt to new blood sources if their natural hosts disappear (as can occur when human and its domestic animals invade new areas), and potentially use human/domestic animals without a real evolutionary cost. Some studies have measured different life‐history traits of triatomines in relation to different blood hosts (Emmanuelle‐Machado et al., ; Gomes, Azambuja, & Garcia, ; Guarneri, Araujo, Diotaiuti, Gontijo, & Pereira, ; Guarneri, Pereira, & Diotaiuti, ; Lunardi, Gomes, Peres Camara, & Arrais‐Silva, ; Martinez‐Ibarra, Grant‐Guillen, Nogueda‐Torres, & Trujillo‐Contreras, ; Martinez‐Ibarra et al., ; Medone, Balsalobre, Rabinovich, Marti, & Menu, ; Nattero, Leonhard, Rodriguez, & Crocco, ; Nattero, Rodriguez, & Crocco, ), as well as blood host preferences (Crocco & Catala, ; Gürtler et al., ; Jiron & Zeledon, ). This kind of studies can shed light on the attractiveness of human and/or domestic animals as blood hosts, as well as the performances and advantages/disadvantages to feed on them, and can thus help predicting the potential for domiciliation of different triatomine populations (Guarneri et al., ).…”

Section: Triatomine Life‐history Evolution and Vector Control Challengesmentioning

confidence: 99%

Evolutionary ecology of Chagas disease; what do we know and what do we need?

Flores-Ferrer

Marcou

Waleckx

et al. 2017

Evolutionary Applications

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The aetiological agent of Chagas disease, Trypanosoma cruzi, is a key human pathogen afflicting most populations of Latin America. This vectorborne parasite is transmitted by haematophageous triatomines, whose control by large‐scale insecticide spraying has been the main strategy to limit the impact of the disease for over 25 years. While those international initiatives have been successful in highly endemic areas, this systematic approach is now challenged by the emergence of insecticide resistance and by its low efficacy in controlling species that are only partially adapted to human habitat. In this contribution, we review evidences that Chagas disease control shall now be entering a second stage that will rely on a better understanding of triatomines adaptive potential, which requires promoting microevolutionary studies and –omic approaches. Concomitantly, we show that our knowledge of the determinants of the evolution of T. cruzi high diversity and low virulence remains too limiting to design evolution‐proof strategies, while such attributes may be part of the future of Chagas disease control after the 2020 WHO's target of regional elimination of intradomiciliary transmission has been reached. We should then aim at developing a theory of T. cruzi virulence evolution that we anticipate to provide an interesting enrichment of the general theory according to the specificities of transmission of this very generalist stercorarian trypanosome. We stress that many ecological data required to better understand selective pressures acting on vector and parasite populations are already available as they have been meticulously accumulated in the last century of field research. Although more specific information will surely be needed, an effective research strategy would be to integrate data into the conceptual and theoretical framework of evolutionary ecology and life‐history evolution that provide the quantitative backgrounds necessary to understand and possibly anticipate adaptive responses to public health interventions.

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Section: Triatomine Life‐history Evolution and Vector Control Challengesmentioning

confidence: 99%

Evolutionary ecology of Chagas disease; what do we know and what do we need?

Flores-Ferrer

Marcou

Waleckx

et al. 2017

Evolutionary Applications

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“…Lunardi et al (2017) discussed that morphological plasticity in the shape of T. williami is associated with blood source, but they did not test whether plasticity confers a tness advantage to culminate in domiciliation by this species. However, in a previous study, Lunardi et al (2015) recorded a high potential vector for nymphs of this species.…”

Section: Discussionmentioning

confidence: 74%

Triatoma Williami Galvão, Souza e Lima, 1965 (Hemiptera, Triatominae) in Intradomiciliary Environments of Urban Area in Mato Grosso State, Brazil Domiciliation Process of a Wild Species?

Martins

Moraes

Oliveira

et al. 2021

Preprint

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Background: Triatomines found throughout Latin America are natural Chagas disease vectors (ChD). The domiciliation of triatomines is one of the main factors increasing the occurrence risk of human cases of this disease. There are 66 species of triatomine in Brazil, with three genera of significant epidemiological importance: Panstrongylus, Rhodnius, and Triatoma. Among the Triatoma species, Triatoma williami, a wild species, has been reported in the Brazilian states of Goiás, Mato Grosso, and Mato Grosso do Sul. In the city of Barra do Garças, Mato Grosso, the invasion by triatomines has been reported, with T. williami being the most common species. Methods: Triatomine specimens were collected by passive surveillance or by active search by agents combating endemic diseases. After taxonomic identification, a parasitological feces diagnosis was performed to detect the presence of Trypanosoma cruzi. Concerning T. cruzi identification, molecular diagnosis and genetic sequencing were performed to identify the strain, also called discrete typing units (DTUs). Results: In 2019, several triatomine specimens were collected in the urban area of Barra do Garças, Mato Grosso. Among them, 155 specimens were T. williami, P. geniculatus, and R. neglectus. In 2020, the sampled triatomine specimens were 56 T. williami, Panstrongylus diasi, and R. neglectus. For these years, T. williami has been the most frequent species. Between 2019 and 2020, 137 T. williami were collected (61% of them inside houses). In two triatomine colonies were found and morphological analyses, indicated were T. williami. These insects were collected inside houses in an urban area, on a neighborhood from Jardim Pitaluga (15°51’57.7” N, 052°16’04.5E). The records were sampled in September/2019 and January/2021. The rate of natural infection was 30.3% and 73.5% for 2019 to 2020. Two T. williami specimens belonging to one of colonies were positive for T. cruzi strain DTU IV, Conclusions: This is the first time that the occurrence of domiciliation of T. williami has been confirmed in an urban area of Barra do Garças, Mato Grosso, Brazil. Further studies are needed for a clearer understanding of the ecology of this species for prevention and control mechanisms, since its sampled specimens had a high rate of natural infection by T. cruzi.

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“…One study [ 39 ] mentioned that morphological plasticity in the shape of T. williami is associated with blood source, but they did not test whether plasticity confers a fitness advantage to culminate in domiciliation by this species. However, a high potential vector for nymphs of this species was recorded in a previous study [ 40 ].…”

Section: Discussionmentioning

confidence: 99%

Triatoma williami in intradomiciliary environments of urban areas in Mato Grosso State, Brazil: domiciliation process of a wild species?

Martins¹,

Moraes²,

Oliveira

et al. 2022

Infect Dis Poverty

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Background Triatomines in Latin America are natural Chagas disease (ChD) vectors. Triatomine domiciliation is one of the main factors increasing the occurrence risk of this disease in humans. There are 66 triatomine species in Brazil, with three genera of significant epidemiological importance—Panstrongylus, Rhodnius, and Triatoma. Among the Triatoma species, Triatoma williami, a wild species, has been reported in Goiás, Mato Grosso, and Mato Grosso do Sul. In the Barra do Garças, Mato Grosso, the invasion by triatomines has been reported, with T. williami being the most common species. This study aimed to survey triatomine fauna and determine the Trypanosoma cruzi natural infection rates in triatomines in the urban area of Barra do Garças, Mato Grosso, Brazil. Methods Triatomine specimens were sampled by passive surveillance or active search by agents combating endemic diseases from 2019 to 2020. A parasitological feces diagnosis was performed to detect the presence of T. cruzi after the specimens were identified. Concerning T. cruzi identification, molecular diagnosis and genetic sequencing were performed to determine the strain, also called discrete typing units (DTUs). Results The 211 triatomines were collected, distributed in specimens of T. williami (84.4%), P. geniculatus (3.3%), P. diasi (1.4%), and R. neglectus (10.9%). Two colonies of T. williami were found through morphological analyses. These insects were sampled inside domiciles in an urban area neighboring Jardim Pitaluga (15° 51′57.7″ N, 052° 16′ 04.5 E). The records were sampled in September 2019 and January 2021. The rate of natural infection by T. cruzi was 39.4%. Two T. williami specimens from the sampled colonies were positive for the T. cruzi strain DTU IV. Conclusions This is the first time that T. williami has been confirmed in an urban area of Barra do Garças, Mato Grosso, Brazil. Further studies are needed for a clearer understanding of the ecology of this species for prevention and control mechanisms since its sampled specimens had a high rate of natural infection by T. cruzi. Graphical Abstract

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Life cycle and vectorial competence of Triatoma williami (Galvão, Souza e Lima, 1965) under the influence of different blood meal sources

Cited by 6 publications

References 49 publications

Evolutionary ecology of Chagas disease; what do we know and what do we need?

Evolutionary ecology of Chagas disease; what do we know and what do we need?

Triatoma Williami Galvão, Souza e Lima, 1965 (Hemiptera, Triatominae) in Intradomiciliary Environments of Urban Area in Mato Grosso State, Brazil Domiciliation Process of a Wild Species?

Triatoma williami in intradomiciliary environments of urban areas in Mato Grosso State, Brazil: domiciliation process of a wild species?

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