Residual foci of Triatoma infestans infestation: Surveillance and control in Rio Grande do Sul, Brazil, 2001-2018

Bedin, Cleonara; Wilhelms, Tania Stasiak; Villela, Marcos Marreiro; Silva, Guilherme Carlos Castilhos da; Riffel, Alessandro; Sackis, Paulo; Mello, Fernanda Bastos de

doi:10.1590/0037-8682-0530-2020

Cited by 10 publications

(9 citation statements)

References 10 publications

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“…The study carried out by Almeida et al 20 showed the increasing frequency of T. rubrovaria in rural households in Southeastern RS State and stated these authors claimed that this species may be invading areas that had been previously occupied by T. infestans , the main domestic CD vector which was eliminated in the State by chemical control 11 , corroborating the findings of this study.…”

Section: Discussionsupporting

confidence: 87%

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Current situation of Chagas disease vectors (Hemiptera, Reduviidae) in Southern Rio Grande do Sul State, Brazil

Bianchi

Jeske

Grala

et al. 2021

Rev. Inst. Med. trop. S. Paulo

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Chagas disease (CD) has been considered endemic in the South of Rio Grande do Sul (RS) State, Brazil. This study aimed at evaluating the occurrence of Trypanosoma cruzi vectors based on the main species captured in Southern Rio Grande do Sul State from 2008 to 2019. The study area comprised counties that belong to the 3 rd Regional Health Coordination (RHC) and to the 7 th RHC, whose headquarters are in Pelotas and Bage, respectively. The study was based on secondary data provided by the partnership between the Federal University of Pelotas, Rio Grande do Sul State (UFPel-RS) and the State Health Surveillance Center in RS (SCHS-RS). One thousand and four hundred triatomines were captured in the area supervised by the 3 rd RHC, mainly in Cangucu (37.7%), Piratini (22.4%) and Pinheiro Machado (15.1%), while, in the area supervised by the 7 th RHC, the largest number of triatomines was captured in Lavras do Sul (64.15%). In both areas, Triatoma rubrovaria (90.6%) and Panstrongylus tupynambai (7.4%) were the most common species. Most were captured inside households but T. cruzi -positive insects were not found in the period under study. The results of this study show that, in Southern Rio Grande do Sul State, there is still a high rate of triatomine household invasion and dispersal, mainly by T. rubrovaria . Thus, the entomological surveillance should be maintained with the participation of the population and further studies should be deepened in the area.

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Section: Discussionsupporting

confidence: 87%

“…Although T. infestans has been eliminated in RS State, there are other triatomine species that persist in rural households 11 . Therefore, this study aimed at evaluating the occurrence of CD vectors based on the main species captured in Southern RS, from 2008 to 2019.…”

Section: Introductionmentioning

confidence: 99%

Current situation of Chagas disease vectors (Hemiptera, Reduviidae) in Southern Rio Grande do Sul State, Brazil

Bianchi

Jeske

Grala

et al. 2021

Rev. Inst. Med. trop. S. Paulo

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“…50 , 121 As with R. prolixus in Mexico, 16 however, a few T. infestans residual foci have since been detected in Brazil, again underscoring the need for long-term surveillance. 122 , 123 , 124 , 125 Non-native T. infestans have also proven difficult to control in urban Arequipa, Peru. 126 , 127 Importantly, moreover, T. infestans is native, and hence widespread in wild environments, across the dry Chaco (Argentina, Paraguay and Bolivia) and the inter-Andean temperate-dry valleys of south-eastern Bolivia.…”

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confidence: 99%

Chagas disease control-surveillance in the Americas: the multinational initiatives and the practical impossibility of interrupting vector-borne Trypanosoma cruzi transmission

Arias¹,

Monroy

Guhl

et al. 2022

Mem. Inst. Oswaldo Cruz

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Chagas disease (CD) still imposes a heavy burden on most Latin American countries. Vector-borne and mother-to-child transmission cause several thousand new infections per year, and at least 5 million people carry Trypanosoma cruzi . Access to diagnosis and medical care, however, is far from universal. Starting in the 1990s, CD-endemic countries and the Pan American Health Organization-World Health Organization (PAHO-WHO) launched a series of multinational initiatives for CD control-surveillance. An overview of the initiatives’ aims, achievements, and challenges reveals some key common themes that we discuss here in the context of the WHO 2030 goals for CD. Transmission of T. cruzi via blood transfusion and organ transplantation is effectively under control. T. cruzi , however, is a zoonotic pathogen with 100+ vector species widely spread across the Americas; interrupting vector-borne transmission seems therefore unfeasible. Stronger surveillance systems are, and will continue to be, needed to monitor and control CD. Prevention of vertical transmission demands boosting current efforts to screen pregnant and childbearing-aged women. Finally, integral patient care is a critical unmet need in most countries. The decades-long experience of the initiatives, in sum, hints at the practical impossibility of interrupting vector-borne T. cruzi transmission in the Americas. The concept of disease control seems to provide a more realistic description of what can in effect be achieved by 2030.

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“…Triatoma infestans, a species that is better adapted to households, is regarded as the main vector of CD. However, even though this vector was eliminated from southern RS, other species of triatomines have persisted in rural houses 3,4,5 .…”

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confidence: 99%

Seroprevalence of Trypanosoma cruzi infection in blood donors in the extreme South of Brazil

Bianchi

Grala

Leon

et al. 2022

Rev. Soc. Bras. Med. Trop.

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Residual foci of Triatoma infestans infestation: Surveillance and control in Rio Grande do Sul, Brazil, 2001-2018

Cited by 10 publications

References 10 publications

Current situation of Chagas disease vectors (Hemiptera, Reduviidae) in Southern Rio Grande do Sul State, Brazil

Current situation of Chagas disease vectors (Hemiptera, Reduviidae) in Southern Rio Grande do Sul State, Brazil

Chagas disease control-surveillance in the Americas: the multinational initiatives and the practical impossibility of interrupting vector-borne Trypanosoma cruzi transmission

Seroprevalence of Trypanosoma cruzi infection in blood donors in the extreme South of Brazil

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