Infection of Triatoma guasayana, Triatoma sordida and Triatoma infestans by Trypanosoma cruzi from a Naturally Infected Opossum

Schweigmann, Nicolás; Pietrokovsky, Silvia; Conti, Osvaldo; Escosteguy, Mariana; Bottazzi, Victoria; Solarz, Nora; Wisnivesky‐Colli, Cristina

doi:10.1590/s0074-02761997000200003

Cited by 3 publications

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“…Comparative studies of naturally-infected wild hosts xenodiagnosed with T. infestans and different species of triatomine bugs either revealed marginal differences in infectiousness between vector species (Minter et al, 1978;Moreira and Perlowagora-Szumlewicz, 1997), or the superiority of T. infestans third-instar nymphs relative to T. sordida and Triatoma guasayana fifth instars (the putative sylvatic vectors) fed on a Di. albiventris opossum naturally infected with TcI (Schweigmann et al, 1997). We conclude that xenodiagnostic tests using T. infestans are very effective at least for opossums and armadillos infected with TcI and TcIII.…”

Section: Discussionmentioning

confidence: 76%

A comparative study of Trypanosoma cruzi infection in sylvatic mammals from a protected and a disturbed area in the Argentine Chaco

et al. 2016

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Understanding the complex epidemiology of Trypanosoma cruzi transmission cycles requires comparative studies in widely different environments. We assessed the occurrence of T. cruzi infection in sylvatic mammals, their infectiousness to the vector, and parasite genotypes in a protected area of the Argentine Chaco, and compared them with information obtained similarly in a nearby disturbed area. A total of 278 mammals from >23 species in the protected area were diagnosed for T. cruzi infection using xenodiagnosis, kDNA-PCR and nuclear satellite DNA-PCR (SAT) from blood samples. The relative abundance and species composition differed substantially between areas. Didelphis albiventris opossums were less abundant in the protected area; had a significantly lower body mass index, and a stage structure biased toward earlier stages. The capture of armadillos was lower in the protected area. The composite prevalence of T. cruzi infection across host species was significantly lower in the protected area (11.1%) than in the disturbed area (22.1%), and heterogeneous across species groups. The prevalence of infection in D. albiventris and Thylamys pusilla opossums was significantly lower in the protected area (nil for D. albiventris), whereas infection in sigmodontine rodents was three times higher in the protected area (17.5 versus 5.7%). Parasite isolates from the two xenodiagnosis-positive mammals (1 Dasypus novemcinctus and 1 Conepatus chinga) were typed as TcIII; both specimens were highly infectious to Triatoma infestans. Fat-tailed opossums, bats and rodents were kDNA-PCR-positive and xenodiagnosis-negative. Desmodus rotundus and Myotis bats were found infected with T. cruzi for the first time in the Gran Chaco.

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Section: Discussionmentioning

confidence: 76%

A comparative study of Trypanosoma cruzi infection in sylvatic mammals from a protected and a disturbed area in the Argentine Chaco

et al. 2016

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“…Su susceptibilidad a la infección es muy alta (5), tienen parasitemia persistente y presentan gran capacidad para 1 Esta investigación recibió apoyo económico del Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET) y de la Universidad de Buenos Aires. 2 infectar vectores triatominos (6). Aparentemente, la infección no les provoca enfermedad y algunos autores sugieren que esto evidenciaría una asociación muy antigua entre los marsupiales y el parásito (7).…”

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“…Las zarigüeyas son animales omnívoros, de hábitos nocturnos y merodeadores, que suelen acercarse a las viviendas en busca de alimento (3,4). Pueden así adquirir la infección al ingerir triatominos o transmitirla al servir como fuente de sangre para estos, constituyéndose en un nexo entre los ciclos silvestre y domés-tico (1,6,8). D. albiventris es exclusivamente sudamericano y su mapa de distribución tiene forma de "Y" (figura 1), cuyo brazo occidental corresponde a las alturas medias de los Andes (Bolivia, Colombia, Ecuador y Perú); la rama oriental se extiende por la costa de Brasil (Ceará, Pernambuco) y el eje inferior corresponde a Argentina, Paraguay y Uruguay, hasta aproximadamente los 40°de latitud sur en el valle del río Negro en la Patagonia.…”

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Estudio de la prevalencia de la infección por Trypanosoma cruzi en zarigüeyas (Didelphis albiventris) en Santiago del Estero, Argentina

Schweigmann¹,

Pietrokovsky²,

Bottazzi³

et al. 1999

Rev Panam Salud Publica

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Triatoma rosai sp. nov. (Hemiptera, Triatominae): A New Species of Argentinian Chagas Disease Vector Described Based on Integrative Taxonomy

Alevi

Oliveira

Garcia

et al. 2020

Insects

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Chagas disease is the most prevalent neglected tropical disease in the Americas and makes an important contribution to morbidity and mortality rates in countries where it is endemic since 30 to 40% of patients develop cardiac diseases, gastrointestinal disorders, or both. In this paper, a new species of the genus Triatoma is described based on specimens collected in the Department San Miguel, Province of Corrientes, Argentina. Triatoma rosai sp. nov. is closely related to T. sordida (Stål, 1859), and was characterized based on integrative taxonomy using morphological, morphometric, molecular data, and experimental crosses. These analyses, combined with data from the literature (cytogenetics, electrophoresis pattern, molecular analyses, cuticular hydrocarbons pattern, geometric morphometry, cycle, and average time of life as well as geographic distribution) confirm the specific status of T. rosai sp. nov. Natural Trypanosoma cruzi infection, coupled with its presence mostly in peridomestic habitats, indicates that this species can be considered as an important Chagas disease vector from Argentina.

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Infection of Triatoma guasayana, Triatoma sordida and Triatoma infestans by Trypanosoma cruzi from a Naturally Infected Opossum

Cited by 3 publications

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A comparative study of Trypanosoma cruzi infection in sylvatic mammals from a protected and a disturbed area in the Argentine Chaco

A comparative study of Trypanosoma cruzi infection in sylvatic mammals from a protected and a disturbed area in the Argentine Chaco

Estudio de la prevalencia de la infección por Trypanosoma cruzi en zarigüeyas (Didelphis albiventris) en Santiago del Estero, Argentina

Triatoma rosai sp. nov. (Hemiptera, Triatominae): A New Species of Argentinian Chagas Disease Vector Described Based on Integrative Taxonomy

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