Trypanosoma cruzi-infected Panstrongylus geniculatus and Rhodnius robustus adults invade households in the Tropics of Cochabamba region of Bolivia

Cortez, Mirko Rojas; Pinazo, María Jesús; García, Lineth; Arteaga, Mery; Uriona, Liliana; Gamboa, Seyla; Mejia, Carolina; Lozano, Daniel; Gascón, Joaquim; Torrico, Faustino; Monteiro, Fernando A.

doi:10.1186/s13071-016-1445-1

Cited by 17 publications

(19 citation statements)

References 23 publications

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“…longipennis in Jalisco state [ 34 ]. (ii) In the genus Panstrongylus , besides TcI, the dominant DTU (96.7%), TcII was identified in Brazil, TcIII in sylvatic cycles in three countries (Brazil, Colombia and Venezuela) and in domestic cycles in Bolivia [ 46 ], and TcIV [ 47 ] and TcV or TcVI were identified once in Venezuela and Brazil respectively [ 13 , 47 ]. The hybrid strains (TcV or TcVI) were identified in P .…”

Section: Resultsmentioning

confidence: 99%

Over Six Thousand Trypanosoma cruzi Strains Classified into Discrete Typing Units (DTUs): Attempt at an Inventory

2016

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Trypanosoma cruzi, the causative agent of Chagas disease, presents wide genetic diversity. Currently, six discrete typing units (DTUs), named TcI to TcVI, and a seventh one called TcBat are used for strain typing. Beyond the debate concerning this classification, this systematic review has attempted to provide an inventory by compiling the results of 137 articles that have used it. A total of 6,343 DTU identifications were analyzed according to the geographical and host origins. Ninety-one percent of the data available is linked to South America. This sample, although not free of potential bias, nevertheless provides today’s picture of T. cruzi genetic diversity that is closest to reality. DTUs were genotyped from 158 species, including 42 vector species. Remarkably, TcI predominated in the overall sample (around 60%), in both sylvatic and domestic cycles. This DTU known to present a high genetic diversity, is very widely distributed geographically, compatible with a long-term evolution. The marsupial is thought to be its most ancestral host and the Gran Chaco region the place of its putative origin. TcII was rarely sampled (9.6%), absent, or extremely rare in North and Central America, and more frequently identified in domestic cycles than in sylvatic cycles. It has a low genetic diversity and has probably found refuge in some mammal species. It is thought to originate in the south-Amazon area. TcIII and TcIV were also rarely sampled. They showed substantial genetic diversity and are thought to be composed of possible polyphyletic subgroups. Even if they are mostly associated with sylvatic transmission cycles, a total of 150 human infections with these DTUs have been reported. TcV and TcVI are clearly associated with domestic transmission cycles. Less than 10% of these DTUs were identified together in sylvatic hosts. They are thought to originate in the Gran Chaco region, where they are predominant and where putative parents exist (TcII and TcIII). Trends in host-DTU specificities exist, but generally it seems that the complexity of the cycles and the participation of numerous vectors and mammal hosts in a shared area, maintains DTU diversity.

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Section: Resultsmentioning

confidence: 99%

Over Six Thousand Trypanosoma cruzi Strains Classified into Discrete Typing Units (DTUs): Attempt at an Inventory

2016

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“…A similar study was conducted in Cochabamba, Bolivia, a region near the state of Acre, Brazil, where 21 triatomines from the species Panstrongylus geniculatus Latreille, 1811 and Rhodnius robustus Larrousse, 1927 were captured, 63% of which were infected by T. cruzi 11 . This percentage of infection is higher than that found in this study, showing the potential of these species as vectors for Chagas disease.…”

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confidence: 77%

Occurrence of triatomines in an urban residential complex in the municipality of Rio Branco, Acre, South-Western Amazon

Ribeiro

Castro

Souza

et al. 2019

Rev. Soc. Bras. Med. Trop.

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Introduction: This study describes the occurrence of triatomines, and their positivity for trypanosomatids, in a residential complex in Rio Branco, Acre, Brazil. Methods: Triatomines were collected through direct capture in a home environment. Positivity analysis for trypanosomatids was performed by PCR assays. Results: Collected insects consisted of 31 Rhodnius robustus, 4 Rhodnius montenegrensis, and 1 Panstrongylus geniculatus specimens. All were adults, with no presence of domiciliation, and with an infection rate of 30.6%. Conclusions: Future studies are recommended in other locations of Rio Branco in order to develop a georeference database of the occurrence of triatomines in urban areas.

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“…(157) The Trinidadian rate is 42.5%, (80) the Colombian rates are 50%, (40) 70.6% (93) and 58.3%, (118) the Venezuelan rates are 20% (138) and 76.1%, (128) the Peruvian rate is 50%, (120) and the Bolivian rate is 62.5%. (51) Currently, seven DTUs, TcI to TcVI and T.c.bat, are known to circulate in the vectors in different proportions. (158,159) The T. cruzi DTUs in P. geniculatus correspond to six of the seven described DTUs (TcI, TcII, TcIII, TcIV, TcV and TcVI), the geographic distributions of which in America for P. geniculatus are shown in Fig.…”

Section: Dtus Of T Cruzi Detected In P Geniculatusmentioning

confidence: 99%

Systematic review on the biology, ecology, genetic diversity and parasite transmission potential of Panstrongylus geniculatus (Latreille 1811) in Latin America

Vivas

García

Guhl

et al. 2021

Mem. Inst. Oswaldo Cruz

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Panstrongylus geniculatus (Latreille, 1811) is the triatomine with the largest geographic distribution in Latin America. It has been reported in 18 countries from southern Mexico to northern Argentina, including the Caribbean islands. Although most reports indicate that P. geniculatus has wild habitats, this species has intrusive habits regarding human dwellings mainly located in intermediate deforested areas. It is attracted by artificial light from urban and rural buildings, raising the risk of transmission of Trypanosoma cruzi . Despite the wide body of published information on P. geniculatus , many knowledge gaps exist about its biology and epidemiological potential. For this reason, we analysed the literature for P. geniculatus in Scopus, PubMed, Scielo, Google Scholar and the BibTriv3.0 databases to update existing knowledge and provide better information on its geographic distribution, life cycle, genetic diversity, evidence of intrusion and domiciliation, vector-related circulating discrete taxonomic units, possible role in oral T. cruzi transmission, and the effect of climate change on its biology and epidemiology.

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Trypanosoma cruzi-infected Panstrongylus geniculatus and Rhodnius robustus adults invade households in the Tropics of Cochabamba region of Bolivia

Cited by 17 publications

References 23 publications

Over Six Thousand Trypanosoma cruzi Strains Classified into Discrete Typing Units (DTUs): Attempt at an Inventory

Over Six Thousand Trypanosoma cruzi Strains Classified into Discrete Typing Units (DTUs): Attempt at an Inventory

Occurrence of triatomines in an urban residential complex in the municipality of Rio Branco, Acre, South-Western Amazon

Systematic review on the biology, ecology, genetic diversity and parasite transmission potential of Panstrongylus geniculatus (Latreille 1811) in Latin America

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