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Verly T, Pita S, Carbajal-de-la-Fuente AL, Burgueño-Rodríguez G, Piccinali RV, Fiad FG, Ríos N, Panzera F, Lobbia P, Sánchez-Casaccia P, Rojas de Arias A, Cavallo MJ, Gigena GV, Rodríguez CS, Nattero J. Relationship between genetic diversity and morpho-functional characteristics of flight-related traits in Triatoma garciabesi (Hemiptera: Reduviidae). Parasit Vectors 2024; 17:145. [PMID: 38500121 PMCID: PMC10949591 DOI: 10.1186/s13071-024-06211-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Accepted: 02/22/2024] [Indexed: 03/20/2024] Open
Abstract
BACKGROUND Triatoma garciabesi, a potential vector of the parasitic protozoan Trypanosoma cruzi, which is the causative agent of Chagas disease, is common in peridomestic and wild environments and found throughout northwestern and central Argentina, western Paraguay and the Bolivian Chaco. Genetic differentiation of a species across its range can help to understand dispersal patterns and connectivity between habitats. Dispersal by flight is considered to be the main active dispersal strategy used by triatomines. In particular, the morphological structure of the hemelytra is associated with their function. The aim of this study was to understand how genetic diversity is structured, how morphological variation of dispersal-related traits varies with genetic diversity and how the morphological characteristics of dispersal-related traits may explain the current distribution of genetic lineages in this species. METHODS Males from 24 populations of T. garciabesi across its distribution range were examined. The cytochrome c oxidase I gene (coI) was used for genetic diversity analyses. A geometric morphometric method based on landmarks was used for morpho-functional analysis of the hemelytra. Centroid size (CS) and shape of the forewing, and contour of both parts of the forewing, the head and the pronotum were characterised. Length and area of the forewing were measured to estimate the aspect ratio. RESULTS The morphometric and phylogenetic analysis identified two distinct lineages, namely the Eastern and Western lineages, which coincide with different ecological regions. The Eastern lineage is found exclusively in the eastern region of Argentina (Chaco and Formosa provinces), whereas the Western lineage is prevalent in the rest of the geographical range of the species. CS, shape and aspect ratio of the hemelytra differed between lineages. The stiff portion of the forewing was more developed in the Eastern lineage. The shape of both portions of the hemelytra were significantly different between lineages, and the shape of the head and pronotum differed between lineages. CONCLUSIONS The results provide preliminary insights into the evolution and diversification of T. garciabesi. Variation in the forewing, pronotum and head is congruent with genetic divergence. Consistent with genetic divergence, morphometry variation was clustered according to lineages, with congruent variation in the size and shape of the forewing, pronotum and head.
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Affiliation(s)
- Thaiane Verly
- Centro Nacional de Diagnóstico e Investigación en Endemo-Epidemias (CeNDIE), Administración Nacional de Laboratorios e Institutos de Salud "Dr. Carlos Malbrán" (ANLIS), Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Sebastián Pita
- Sección Genética Evolutiva, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay.
| | - Ana Laura Carbajal-de-la-Fuente
- Centro Nacional de Diagnóstico e Investigación en Endemo-Epidemias (CeNDIE), Administración Nacional de Laboratorios e Institutos de Salud "Dr. Carlos Malbrán" (ANLIS), Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | | | - Romina V Piccinali
- Departamento de Ecología Genética y Evolución, Laboratorio de Eco-Epidemiología, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
- Instituto de Ecología, Genética y Evolución (IEGEBA), CONICET/Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Federico G Fiad
- Cátedras de Introducción a la Biología y Morfología Animal, Instituto de Investigaciones Biológicas y Tecnológicas (IIByT), Facultad de Ciencias Exactas Físicas y Naturales, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)/Universidad Nacional de Córdoba, Córdoba, Argentina
| | - Néstor Ríos
- Sección Genética Evolutiva, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay
| | - Francisco Panzera
- Sección Genética Evolutiva, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay
| | - Patricia Lobbia
- Unidad Operativa de Vectores y Ambiente (UnOVE), Administración Nacional de Laboratorios e Institutos de Salud "Dr. Carlos Malbrán", Centro Nacional de Diagnostico e Investigación en Endemo-Epidemias (CeNDIE), Córdoba, Argentina
| | - Paz Sánchez-Casaccia
- Centro Nacional de Diagnóstico e Investigación en Endemo-Epidemias (CeNDIE), Administración Nacional de Laboratorios e Institutos de Salud "Dr. Carlos Malbrán" (ANLIS), Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
- Centro para el Desarrollo de la Investigación Científica (CEDIC), Asunción, Paraguay
| | | | - María José Cavallo
- Centro Regional de Energía y Ambiente Para el Desarrollo Sustentable (CREAS-CONICET), Universidad Nacional de Catamarca (UNCA), San Fernando del Valle de Catamarca, Catamarca, Argentina
| | - Gisel V Gigena
- Cátedras de Introducción a la Biología y Morfología Animal, Instituto de Investigaciones Biológicas y Tecnológicas (IIByT), Facultad de Ciencias Exactas Físicas y Naturales, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)/Universidad Nacional de Córdoba, Córdoba, Argentina
| | - Claudia S Rodríguez
- Cátedras de Introducción a la Biología y Morfología Animal, Instituto de Investigaciones Biológicas y Tecnológicas (IIByT), Facultad de Ciencias Exactas Físicas y Naturales, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)/Universidad Nacional de Córdoba, Córdoba, Argentina
| | - Julieta Nattero
- Departamento de Ecología Genética y Evolución, Laboratorio de Eco-Epidemiología, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina.
- Instituto de Ecología, Genética y Evolución (IEGEBA), CONICET/Universidad de Buenos Aires, Buenos Aires, Argentina.
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Golub NV, Anokhin BA, Kuznetsova VG. Karyotype diversity in the genus Nysius Dallas, 1852 (Hemiptera, Heteroptera, Lygaeidae) is much greater than you might think. COMPARATIVE CYTOGENETICS 2023; 17:287-293. [PMID: 38152388 PMCID: PMC10752037 DOI: 10.3897/compcytogen.17.116628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Accepted: 12/06/2023] [Indexed: 12/29/2023]
Abstract
We studied the karyotype and chromosomal distribution of 18S rDNA clustered in nucleolar organizer regions (NORs) in Nysiusgraminicola (Kolenati, 1845), belonging to the subfamily Orsillinae (Lygaeidae). It is shown that this species has a karyotype with 2n = 22(18+mm+XY), previously known in only one of 24 studied species of the genus Nysius Dallas, 1852, characterized by a similar karyotype, 2n = 14(12+mm+XY). In N.graminicola, 18S loci are located on sex chromosomes, which is a previously unknown trait for this genus. Our results in a compilation with previous data revealed dynamic evolution of rDNA distribution in Nysius. It is concluded that molecular chromosomal markers detected by FISH contribute to a better understanding of the structure and evolution of the taxonomically complex genus Nysius.
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Affiliation(s)
- Natalia V. Golub
- Department of Karyosystematics, Zoological Institute,
Russian Academy of Sciences, Universitetskaya emb. 1, 199034 St. Petersburg,
RussiaDepartment of Karyosystematics, Zoological Institute, Russian Academy of
SciencesSt. PetersburgRussia
| | - Boris A. Anokhin
- Department of Karyosystematics, Zoological Institute,
Russian Academy of Sciences, Universitetskaya emb. 1, 199034 St. Petersburg,
RussiaDepartment of Karyosystematics, Zoological Institute, Russian Academy of
SciencesSt. PetersburgRussia
| | - Valentina G. Kuznetsova
- Department of Karyosystematics, Zoological Institute,
Russian Academy of Sciences, Universitetskaya emb. 1, 199034 St. Petersburg,
RussiaDepartment of Karyosystematics, Zoological Institute, Russian Academy of
SciencesSt. PetersburgRussia
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Azevedo LMS, Cesaretto NR, de Oliveira J, Ravazi A, Dos Reis YV, Tadini SCAF, da Silva Masarin I, Borsatto KC, Galvão C, da Rosa JA, de Azeredo-Oliveira MTV, Alevi KCC. First evidence of gonadal hybrid dysgenesis in Chagas disease vectors (Hemiptera, Triatominae): gonad atrophy prevents events of interspecific gene flow and introgression. Parasit Vectors 2023; 16:390. [PMID: 37891624 PMCID: PMC10604409 DOI: 10.1186/s13071-023-06006-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Accepted: 10/08/2023] [Indexed: 10/29/2023] Open
Abstract
BACKGROUND Hybridization events between Triatoma spp. have been observed under both natural and laboratory conditions. The ability to produce hybrids can influence different aspects of the parent species, and may even result in events of introgression, speciation and extinction. Hybrid sterility is caused by unviable gametes (due to errors in chromosomal pairing [meiosis]) or by gonadal dysgenesis (GD). All of the triatomine hybrids analyzed so far have not presented GD. We describe here for the first time GD events in triatomine hybrids and highlight these taxonomic and evolutionary implications of these events. METHODS Reciprocal experimental crosses were performed between Triatoma longipennis and Triatoma mopan. Intercrosses were also performed between the hybrids, and backcrosses were performed between the hybrids and the parent species. In addition, morphological and cytological analyzes were performed on the atrophied gonads of the hybrids. RESULTS Hybrids were obtained only for the crosses T. mopan♀ × T. longipennis♂. Intercrosses and backcrosses did not result in offspring. Morphological analyses of the male gonads of the hybrids confirmed that the phenomenon that resulted in sterility of the hybrid was bilateral GD (the gonads of the hybrids were completely atrophied). Cytological analyses of the testes of the hybrids also confirmed GD, with no germ cells observed (only somatic cells, which make up the peritoneal sheath). CONCLUSIONS The observations made during this study allowed us to characterize, for the first time, GD in triatomines and demonstrated that gametogenesis does not occur in atrophied gonads. The characterization of GD in male hybrids resulting from the crossing of T. mopan♀ × T. longipennis♂ highlights the importance of evaluating both the morphology and the cytology of the gonads to confirm which event resulted in the sterility of the hybrid: GD (which results in no gamete production) or meiotic errors (which results in non-viable gametes).
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Affiliation(s)
- Luísa Martins Sensato Azevedo
- Laboratório de Biologia Celular, Instituto de Biociências, Letras e Ciências Exatas, Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP), Rua Cristóvão Colombo 2265, 15054-000, São José Do Rio Preto, SP, Brazil
| | - Natália Regina Cesaretto
- Instituto de Biociências, Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP), Rua Dr. Antônio Celso Wagner Zanin 250, Distrito de Rubião Júnior, 18618-689, Botucatu, SP, Brazil
| | - Jader de Oliveira
- Laboratório de Entomologia em Saúde Pública, Departamento de Epidemiologia, Faculdade de Saúde Pública, Universidade de São Paulo (USP), Av. Dr. Arnaldo 715, São Paulo, SP, Brazil
| | - Amanda Ravazi
- Instituto de Biociências, Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP), Rua Dr. Antônio Celso Wagner Zanin 250, Distrito de Rubião Júnior, 18618-689, Botucatu, SP, Brazil
| | - Yago Visinho Dos Reis
- Instituto de Biociências, Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP), Rua Dr. Antônio Celso Wagner Zanin 250, Distrito de Rubião Júnior, 18618-689, Botucatu, SP, Brazil
| | - Samanta Cristina Antoniassi Fernandes Tadini
- Instituto de Biociências, Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP), Rua Dr. Antônio Celso Wagner Zanin 250, Distrito de Rubião Júnior, 18618-689, Botucatu, SP, Brazil
| | - Isabella da Silva Masarin
- Instituto de Biociências, Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP), Rua Dr. Antônio Celso Wagner Zanin 250, Distrito de Rubião Júnior, 18618-689, Botucatu, SP, Brazil
| | - Kelly Cristine Borsatto
- Laboratório de Biologia Celular, Instituto de Biociências, Letras e Ciências Exatas, Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP), Rua Cristóvão Colombo 2265, 15054-000, São José Do Rio Preto, SP, Brazil
| | - Cleber Galvão
- Laboratório Nacional e Internacional de Referência em Taxonomia de Triatomíneos, Instituto Oswaldo Cruz (FIOCRUZ), Av. Brasil 4365, Pavilhão Rocha Lima, Sala 505, 21040-360, Rio de Janeiro, RJ, Brazil.
| | - João Aristeu da Rosa
- Laboratório de Parasitologia, Faculdade de Ciências Farmacêuticas, Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP), Rodovia Araraquara-Jaú Km 1, 14801-902, Araraquara, SP, Brazil
| | - Maria Tercília Vilela de Azeredo-Oliveira
- Laboratório de Biologia Celular, Instituto de Biociências, Letras e Ciências Exatas, Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP), Rua Cristóvão Colombo 2265, 15054-000, São José Do Rio Preto, SP, Brazil
| | - Kaio Cesar Chaboli Alevi
- Instituto de Biociências, Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP), Rua Dr. Antônio Celso Wagner Zanin 250, Distrito de Rubião Júnior, 18618-689, Botucatu, SP, Brazil
- Laboratório de Entomologia em Saúde Pública, Departamento de Epidemiologia, Faculdade de Saúde Pública, Universidade de São Paulo (USP), Av. Dr. Arnaldo 715, São Paulo, SP, Brazil
- Laboratório Nacional e Internacional de Referência em Taxonomia de Triatomíneos, Instituto Oswaldo Cruz (FIOCRUZ), Av. Brasil 4365, Pavilhão Rocha Lima, Sala 505, 21040-360, Rio de Janeiro, RJ, Brazil
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Gómez-Palacio A, Pita S, Abad-Franch F, Monsalve Y, Cantillo-Barraza O, Monteiro FA, Pavan MG, Santos WS, Panzera A, Burgueño-Rodríguez G, Panzera F. Molecular and cytogenetic evidence for sibling species in the Chagas disease vector Triatoma maculata. MEDICAL AND VETERINARY ENTOMOLOGY 2023; 37:316-329. [PMID: 36543747 DOI: 10.1111/mve.12633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Accepted: 12/01/2022] [Indexed: 05/18/2023]
Abstract
Triatoma maculata (Hemiptera, Reduviidae, Triatominae) occurs across dry-to-semiarid ecoregions of northern South America, where it transmits Trypanosoma cruzi, causative agent of Chagas disease. Using 207 field-caught specimens from throughout the species' range, mitochondrial(mt) DNA sequence data, and cytogenetics, we investigated inter-population genetic diversity and the phylogenetic affinities of T. maculata. Mitochondrial DNA sequence analyses (cytb and nd4) disclosed a monophyletic T. maculata clade encompassing three distinct geographic groups: Roraima formation (Guiana shield), Orinoco basin, and Magdalena basin (trans-Andean). Between-group cytb distances (11.0-12.8%) were larger than the ~7.5% expected for sister Triatoma species; the most recent common ancestor of these T. maculata groups may date back to the late Miocene. C-heterochromatin distribution and the sex-chromosome location of 45S ribosomal DNA clusters both distinguished Roraima bugs from Orinoco and Magdalena specimens. Cytb genealogies reinforced that T. maculata is not sister to Triatoma pseudomaculata and probably represents an early (middle-late Miocene) offshoot of the 'South American Triatomini lineage'. In sum, we report extensive genetic diversity and deep phylogeographic structuring in T. maculata, suggesting that it may consist of a complex of at least three sibling taxa. These findings have implications for the systematics, population biology, and perhaps medical relevance of T. maculata sensu lato.
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Affiliation(s)
- Andrés Gómez-Palacio
- Laboratorio de Investigación en Genética Evolutiva - LIGE, Universidad Pedagógica y Tecnológica de Colombia, Tunja, Colombia
| | - Sebastián Pita
- Sección Genética Evolutiva, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay
| | - Fernando Abad-Franch
- Núcleo de Medicina Tropical, Faculdade de Medicina, Universidade de Brasília, Brasília, Brazil
- Laboratório de Ecologia de Doenças Transmissíveis na Amazônia, Instituto Leônidas e Maria Deane - Fiocruz Amazônia, Manaus, Brazil
| | - Yoman Monsalve
- Grupo de Biología y Control de Enfermedades Infecciosas - BCEI, Universidad de Antioquia - UdeA, Medellín, Colombia
| | - Omar Cantillo-Barraza
- Grupo de Biología y Control de Enfermedades Infecciosas - BCEI, Universidad de Antioquia - UdeA, Medellín, Colombia
| | - Fernando A Monteiro
- Laboratorio de Epidemiologia e Sistemática Molecular, Instituto Oswaldo Cruz - Fiocruz, Rio de Janeiro, Brazil
| | - Márcio G Pavan
- Laboratorio de Epidemiologia e Sistemática Molecular, Instituto Oswaldo Cruz - Fiocruz, Rio de Janeiro, Brazil
- Laboratorio de Mosquitos Transmissores de Hematozoários, Instituto Oswaldo Cruz - Fiocruz, Rio de Janeiro, Brazil
| | - Walter S Santos
- Laboratório de Ecologia de Doenças Transmissíveis na Amazônia, Instituto Leônidas e Maria Deane - Fiocruz Amazônia, Manaus, Brazil
- Laboratório de Epidemiologia das Leishmanioses, Instituto Evandro Chagas, Secretaria de Vigilância em Saúde, Ministério da Saúde, Ananindeua, Brazil
| | - Alejandra Panzera
- Howard Hughes Medical Institute, University of Maryland, College Park, Maryland, USA
| | - Gabriela Burgueño-Rodríguez
- Laboratorio de Genética Molecular Humana, Centro Universitario Regional (CENUR) Litoral Norte-Sede Salto, Universidad de la República, Salto, Uruguay
| | - Francisco Panzera
- Sección Genética Evolutiva, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay
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Müller JN, Freitas SPC, Teves SC, Santos-Mallet JR, Lopes CM, Gonçalves TCM. Species-specific differences in the egg exochorium of the sympatric taxa Triatoma costalimai and Triatoma jatai (Hemiptera: Reduviidae: Triatominae). JOURNAL OF MEDICAL ENTOMOLOGY 2023:7140379. [PMID: 37094884 DOI: 10.1093/jme/tjad032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Revised: 02/27/2023] [Accepted: 04/18/2023] [Indexed: 05/03/2023]
Abstract
Triatoma costalimai and Triatoma jatai are related species, which occur in sympatry in Paranã, Tocantins, Brazil, in rocky outcrops and in peridomicile and intradomicile environments. This study compared morphologic and morphometric aspects of the eggs of these species using optical microscopy (OM) and scanning electron microscopy (SEM). Operculum cells (OP) and egg body (EB) were drawn and photographed, their surfaces were measured, and spots were quantified. Statistical analyses were performed using ANOVA and t-tests. OM showed an egg exochorium with spots in T. costalimai and a predominance of short lines in T. jatai. We found significant differences in egg length and width, which were larger in T. costalimai. SEM analysis showed that the operculum of both species had cells with straight and/or rounded rims, with a smooth aspect, random spots, and predominantly pentagonal shape. In the EB, hexagonal cells were predominant, with indices exceeding 60% in both species. Triatoma costalimai cells were flat, with a discrete definition of the rims, whereas T. jatai cells were smooth with well-defined rims. Statistical tests showed significant differences for EB, where T. costalimai cells were larger and have more spots than T. jatai. The eggs can thus be differentiated, thereby contributing to integrative taxonomy.
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Affiliation(s)
- Josiane Nogueira Müller
- Laboratório de Entomologia Médica, Instituto de Pesquisas Cieníficas e Tecnológicas do Estado do Amapá (IEPA), Amapá, Brazil
| | | | - Simone Caldas Teves
- Laboratório Interdisciplinar de Vigilância Entomológica em Diptera e Hemiptera, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, Brazil
| | - Jacenir Reis Santos-Mallet
- Laboratório de Vigilância Entomológica, Fundação Oswaldo Cruz, Piauí, Brazil
- Laboratório Interdisciplinar de Vigilância Entomológica em Diptera e Hemiptera, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, Brazil
- Laboratório de Biodiversidade em Saúde, Universidade Iguaçu (UNIG), Rio de Janeiro, Brazil
| | - Catarina Macedo Lopes
- Laboratório Interdisciplinar de Vigilância Entomológica em Diptera e Hemiptera, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, Brazil
| | - Teresa Cristina Monte Gonçalves
- Laboratório Interdisciplinar de Vigilância Entomológica em Diptera e Hemiptera, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, Brazil
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Oliveira-Correia JPS, Gil-Santana HR, Dos Santos-Mallet JR, Galvão C. Characterization of External Female Genitalia in Five Triatoma Laporte Species of South America (Hemiptera: Reduviidae: Triatominae). Trop Med Infect Dis 2023; 8:tropicalmed8050240. [PMID: 37235288 DOI: 10.3390/tropicalmed8050240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Revised: 04/11/2023] [Accepted: 04/12/2023] [Indexed: 05/28/2023] Open
Abstract
Currently, there are 158 valid species of triatomines, all of which are potential vectors of Trypanosoma cruzi, the etiological agent of Chagas disease. The correct taxonomic identification of triatomines is essential since each species hos a different epidemiological importance. The aim of the study is to compare five species of South American Triatoma. Here we present a comparative study of terminal abdominal segments in females by scanning electron microscopy (SEM) of the species Triatoma delpontei, T. jurbergi, T. infestans var. melanosoma, T. platensis, and T. vandae. The results showed diagnostic characters for the studied species. The dorsal view featured more valuable characters, with seven informative characters. Similarities were observed among T. delpontei, T. infestans var. melanosoma, and T. platensis, and between T. jurbergi and T. vandae, correlating with previous studies. Thus, female genital characters proved to be reliable and useful in the diagnosis of the Triatoma species studied here; additional studies, along with other sets of behavioral, morphological, and molecular data, helped to reinforce the hypotheses found here.
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Affiliation(s)
| | | | - Jacenir Reis Dos Santos-Mallet
- Laboratório Interdisciplinar de Vigilância Entomológica em Diptera e Hemiptera, Instituto Oswaldo Cruz, Fiocruz 21040-900, Brazil
- Laboratório de Vigilância e Biodiversidade em Saúde, Universidade Iguaçu, Nova Iguaçu 26260-045, Brazil
| | - Cleber Galvão
- Laboratório Nacional e Internacional de Referência em Taxonomia de Triatomíneos, Instituto Oswaldo Cruz, Fiocruz 21040-900, Brazil
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de Mello DV, Nhapulo EF, Cesaretto LP, Alevi JJ, Cristal DC, Montanari G, Galvão C, Alevi KCC. Dichotomous Keys Based on Cytogenetic Data for Triatomines Reported in Brazilian Regions with Outbreaks of Orally Transmitted Chagas Disease (Pernambuco and Rio Grande Do Norte). Trop Med Infect Dis 2023; 8:tropicalmed8040196. [PMID: 37104322 PMCID: PMC10144799 DOI: 10.3390/tropicalmed8040196] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Revised: 02/02/2023] [Accepted: 02/03/2023] [Indexed: 03/31/2023] Open
Abstract
Chagas disease (CD) affects about eight million people worldwide. Brazil has the highest number of estimated cases and the largest number of deaths due to CD. Considering the recent outbreaks of oral CD involving at least 27 cases of acute CD in Pernambuco (PE) as well as 18 cases and 2 deaths in the Rio Grande do Norte (RN), we developed dichotomous keys for the identification of triatomine species in these Brazilian states based on cytogenetic data. All triatomine species could be distinguished by cytogenetic characteristics, emphasizing the importance of the newly developed taxonomic keys for the correct identification of triatomes from PE and RN, particularly for species that exhibit morphological similarities, such as Triatoma brasilensis and T. petrocchiae (present in both states) and T. maculata and T. pseudomaculata (as T. pseudomaculata has been misidentified as T. maculata in PE and RN). These alternative keys are expected to provide a useful tool for the scientific community and, above all, health agents, aimed at preventing mistakes from occurring in the identification of the vectors present in PE and RN related to CD outbreaks caused by oral infection.
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Affiliation(s)
- Denis Vinícius de Mello
- Instituto de Biociências, Universidade Estadual Paulista “Júlio de Mesquita Filho” (UNESP), Rua Dr. Antônio Celso Wagner Zanin, 250, Distrito de Rubião Júnior, Botucatu 18618-689, Brazil
| | - Emercio Felisberto Nhapulo
- Laboratório de Entomologia em Saúde Pública, Departamento de Epidemiologia, Faculdade de Saúde Pública, Universidade de São Paulo, Av. Dr. Arnaldo 715, São Paulo 01246-904, Brazil
| | - Laura Poloto Cesaretto
- Instituto de Biociências, Universidade Estadual Paulista “Júlio de Mesquita Filho” (UNESP), Rua Dr. Antônio Celso Wagner Zanin, 250, Distrito de Rubião Júnior, Botucatu 18618-689, Brazil
| | - Julia Junqueira Alevi
- Instituto de Biociências, Universidade Estadual Paulista “Júlio de Mesquita Filho” (UNESP), Rua Dr. Antônio Celso Wagner Zanin, 250, Distrito de Rubião Júnior, Botucatu 18618-689, Brazil
| | - Daniel Cesaretto Cristal
- Instituto de Biociências, Universidade Estadual Paulista “Júlio de Mesquita Filho” (UNESP), Rua Dr. Antônio Celso Wagner Zanin, 250, Distrito de Rubião Júnior, Botucatu 18618-689, Brazil
| | - Giulia Montanari
- Instituto de Biociências, Universidade Estadual Paulista “Júlio de Mesquita Filho” (UNESP), Rua Dr. Antônio Celso Wagner Zanin, 250, Distrito de Rubião Júnior, Botucatu 18618-689, Brazil
| | - Cleber Galvão
- Laboratório Nacional e Internacional de Referência em Taxonomia de Triatomíneos, Instituto Oswaldo Cruz (FIOCRUZ), Av. Brasil 4365, Pavilhão Rocha Lima, sala 505, Rio de Janeiro 21040-360, Brazil
- Correspondence:
| | - Kaio Cesar Chaboli Alevi
- Instituto de Biociências, Universidade Estadual Paulista “Júlio de Mesquita Filho” (UNESP), Rua Dr. Antônio Celso Wagner Zanin, 250, Distrito de Rubião Júnior, Botucatu 18618-689, Brazil
- Laboratório de Entomologia em Saúde Pública, Departamento de Epidemiologia, Faculdade de Saúde Pública, Universidade de São Paulo, Av. Dr. Arnaldo 715, São Paulo 01246-904, Brazil
- Laboratório Nacional e Internacional de Referência em Taxonomia de Triatomíneos, Instituto Oswaldo Cruz (FIOCRUZ), Av. Brasil 4365, Pavilhão Rocha Lima, sala 505, Rio de Janeiro 21040-360, Brazil
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8
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Mora P, Pita S, Montiel EE, Rico-Porras JM, Palomeque T, Panzera F, Lorite P. Making the Genome Huge: The Case of Triatoma delpontei, a Triatominae Species with More than 50% of Its Genome Full of Satellite DNA. Genes (Basel) 2023; 14:genes14020371. [PMID: 36833298 PMCID: PMC9957312 DOI: 10.3390/genes14020371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Revised: 01/17/2023] [Accepted: 01/27/2023] [Indexed: 02/04/2023] Open
Abstract
The genome of Triatoma delpontei Romaña & Abalos 1947 is the largest within Heteroptera, approximately two to three times greater than other evaluated Heteroptera genomes. Here, the repetitive fraction of the genome was determined and compared with its sister species Triatoma infestans Klug 1834, in order to shed light on the karyotypic and genomic evolution of these species. The T. delpontei repeatome analysis showed that the most abundant component in its genome is satellite DNA, which makes up more than half of the genome. The T. delpontei satellitome includes 160 satellite DNA families, most of them also present in T. infestans. In both species, only a few satellite DNA families are overrepresented on the genome. These families are the building blocks of the C-heterochromatic regions. Two of these satellite DNA families that form the heterochromatin are the same in both species. However, there are satellite DNA families highly amplified in the heterochromatin of one species that in the other species are in low abundance and located in the euchromatin. Therefore, the present results depicted the great impact of the satellite DNA sequences in the evolution of Triatominae genomes. Within this scenario, satellitome determination and analysis led to a hypothesis that explains how satDNA sequences have grown on T. delpontei to reach its huge genome size within true bugs.
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Affiliation(s)
- Pablo Mora
- Department of Experimental Biology, Genetics Area, University of Jaén, Paraje las Lagunillas s/n, 23071 Jaén, Spain
| | - Sebastián Pita
- Evolutionary Genetic Section, Faculty of Science, University of the Republic, Iguá 4225, Montevideo 11400, Uruguay
- Correspondence: (S.P.); (P.L.)
| | - Eugenia E. Montiel
- Department of Experimental Biology, Genetics Area, University of Jaén, Paraje las Lagunillas s/n, 23071 Jaén, Spain
| | - José M. Rico-Porras
- Department of Experimental Biology, Genetics Area, University of Jaén, Paraje las Lagunillas s/n, 23071 Jaén, Spain
| | - Teresa Palomeque
- Department of Experimental Biology, Genetics Area, University of Jaén, Paraje las Lagunillas s/n, 23071 Jaén, Spain
| | - Francisco Panzera
- Evolutionary Genetic Section, Faculty of Science, University of the Republic, Iguá 4225, Montevideo 11400, Uruguay
| | - Pedro Lorite
- Department of Experimental Biology, Genetics Area, University of Jaén, Paraje las Lagunillas s/n, 23071 Jaén, Spain
- Correspondence: (S.P.); (P.L.)
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9
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Revisiting the Genetic, Taxonomic and Evolutionary Aspects of Chagas Disease Vectors of the Triatoma phyllosoma Subcomplex (Hemiptera, Triatominae). DIVERSITY 2022. [DOI: 10.3390/d14110978] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Triatoma bassolsae, T. longipennis, T. mazzottii, T. pallidipennis, T. phyllosoma and T. picturata are species that have great epidemiological importance in the transmission of Chagas disease in Mexico. However, there is no consensus regarding the specific status of these species, since they appear in various articles as species, subspecies and even subgenera. Thus, we revisited genetic, taxonomic and evolutionary data that allowed us to assess and discuss the specific status of these six species of the T. phyllosoma subcomplex. Phylogenetic studies were performed with nuclear (18S, 28S, ITS-2) and mitochondrial (16S, cytb, COI, COII, 12S) markers deposited in GenBank. In addition, data from experimental crosses were pooled and the genetic distance to the cytb gene was calculated. The phylogenetic reconstruction enabled us to rescue the six species as independent lineages. Post-zygotic reproductive isolation barriers (sterility and/or hybrid collapse) were observed for some experimental crosses. Although the other experimental crosses did not allow us to characterize reproductive barriers, these species showed high genetic distances in relation to the cytb gene (ranging from 4.6% to 14.9%). Thus, based on the revisited literature data, we confirmed the specific status of these six species of the T. phyllosoma subcomplex based on the phylogenetic and biological concepts of the species.
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Lima de Miranda V, Gurgel-Gonçalves R, Moreira de Souza RDC, Abad-Franch F. Triatoma costalimai, a neglected vector of Trypanosoma cruzi in the Cerrado savannas of South America: A comprehensive review. CURRENT RESEARCH IN PARASITOLOGY & VECTOR-BORNE DISEASES 2022; 2:100102. [PMID: 36479576 PMCID: PMC9720413 DOI: 10.1016/j.crpvbd.2022.100102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Revised: 10/06/2022] [Accepted: 10/31/2022] [Indexed: 06/17/2023]
Abstract
Triatoma costalimai is a little-known triatomine-bug species whose role as a vector of Chagas disease remains poorly understood. To address this gap, we conducted a comprehensive review of the literature and assessed the evidence base from a public-health perspective. We found 89 individual documents/resources with information about T. costalimai. DNA-sequence and cytogenetic data indicate that T. costalimai belongs, together with Triatoma jatai, in a distinct clade within the 'pseudomaculata group' of South American Triatoma. Triatoma costalimai is probably a narrow endemic of the Cerrado on the upper Tocantins River Basin and associated ranges/plateaus; there, the species thrives in the sandstone/limestone outcrops typical of the "Cerrado rupestre" (rocky-soil savanna) and "mata seca decídua calcária" (limestone-soil dry forest) phytophysiognomies. Wild T. costalimai appear to feed on whatever vertebrates are available in rocky outcrops, with lizards and rodents being most common. There is persuasive evidence that house invasion/infestation by T. costalimai has increased in frequency since the 1990s. The bugs often carry Trypanosoma cruzi, often defecate while feeding, have high fecundity/fertility, and, under overtly favorable conditions, can produce two generations per year. Current knowledge suggests that T. costalimai can transmit human Chagas disease in the upper Tocantins Basin; control-surveillance systems should 'tag' the species as a potentially important local vector in the Brazilian states of Goiás and Tocantins. Further research is needed to clarify (i) the drivers and dynamics of house invasion, infestation, and reinfestation by T. costalimai and (ii) the genetic structuring and vector capacity of the species, including its wild and non-wild populations.
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Affiliation(s)
- Vinícius Lima de Miranda
- Laboratório de Parasitologia Médica e Biologia de Vetores, Faculdade de Medicina, Universidade de Brasília, Brasília, Distrito Federal, Brazil
- Departamento de Zoologia, Instituto de Ciências Biológicas, Universidade de Brasília, Brasília, Distrito Federal, Brazil
| | - Rodrigo Gurgel-Gonçalves
- Laboratório de Parasitologia Médica e Biologia de Vetores, Faculdade de Medicina, Universidade de Brasília, Brasília, Distrito Federal, Brazil
- Departamento de Zoologia, Instituto de Ciências Biológicas, Universidade de Brasília, Brasília, Distrito Federal, Brazil
- Núcleo de Medicina Tropical, Faculdade de Medicina, Universidade de Brasília, Brasília, Distrito Federal, Brazil
| | | | - Fernando Abad-Franch
- Núcleo de Medicina Tropical, Faculdade de Medicina, Universidade de Brasília, Brasília, Distrito Federal, Brazil
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da Silva LA, Belintani T, de Paiva VF, Nascimento JD, Ribeiro AR, Gardim S, Rocha CS, de Mello F, Obara MT, de Oliveira J, da Rosa JA. Integrative taxonomy and phylogenetic systematics of the Triatoma rubrovaria subcomplex (Hemiptera, Triatominae). Acta Trop 2022; 237:106699. [DOI: 10.1016/j.actatropica.2022.106699] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 09/23/2022] [Accepted: 09/24/2022] [Indexed: 11/26/2022]
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12
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Triatoma guazu Lent and Wygodzinsky Is a Junior Synonym of Triatoma williami Galvão, Souza and Lima. INSECTS 2022; 13:insects13070591. [PMID: 35886767 PMCID: PMC9318919 DOI: 10.3390/insects13070591] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Revised: 06/23/2022] [Accepted: 06/24/2022] [Indexed: 12/07/2022]
Abstract
Simple Summary Triatomines are blood-sucking insects, potential vectors of Trypanosoma cruzi, the etiological agent of Chagas disease. Triatoma guazu and Triatoma williami are phylogenetically very close and occur in sympatry. Morphologic, morphometric, and genetic analyses were performed to discuss the taxonomic status of these species. Morphometric and molecular data do not show diagnostic characteristics between species, whereas their different patterns of connexival spots were considered a phenotypic polymorphism, common in triatomines. These results suggest T. guazu as a junior synonym of T. williami. Therefore, the synonym between these species is formally proposed here. Abstract Triatoma guazu Lent and Wygodzinsky and Triatoma williami Galvão, Souza, and Lima (Hemiptera: Triatominae) are found in human dwellings and are potential vectors of the protozoan Trypanosoma cruzi, the etiological agent of Chagas disease. Triatoma guazu was described based solely on a single female specimen, from the municipality of Villarica, Guairá Department, Paraguay, and posteriorly, a male from Barra do Garças, Mato Grosso, Brazil was described and designated as the allotype of this species. Triatoma williami is found in the central-west of Brazil between Goiás, Mato Grosso, and Mato Grosso do Sul. However, the taxonomic “status” of these species is questioned. Previous studies indicate the lack of isoenzymatic diagnostic loci, morphometric similarity, low genetic divergence, and close evolutionary relationship of these species. In this study, we compared the morphology, morphometry, and mitochondrial DNA fragments of the populations of the two species. The morphological diagnostic characteristic among these species is the difference in the connexivum spots pattern, which has been recognized as a phenotypic variation that exists among populations resulting from ecological diversity. Furthermore, our analysis also revealed the morphometric similarity and low genetic divergence between these species. Therefore, in the present paper, we formally propose T. guazu as a junior synonym of T. williami.
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Bittinelli IF, de Oliveira J, Dos Reis YV, Ravazi A, Madeira FF, de Oliveira ABB, Montanari G, Gomes AJC, Cesaretto LP, Massarin IDS, Galvão C, de Azeredo-Oliveira MTV, da Rosa JA, Alevi KCC. Do not judge a book by its cover: would Triatoma tibiamaculata (Pinto, 1926) belong to Triatoma Laporte, 1832, or to Panstrongylus Berg, 1879, with misleading homoplasies? Parasit Vectors 2022; 15:184. [PMID: 35643509 PMCID: PMC9148475 DOI: 10.1186/s13071-022-05314-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2021] [Accepted: 05/06/2022] [Indexed: 11/17/2022] Open
Abstract
Background Triatoma tibiamaculata is a species distributed in ten Brazilian states which has epidemiological importance as it has already been found infecting household areas. The taxonomy of this triatomine has been quite unstable: it was initially described as Eutriatoma tibiamaculata. Later, the species was transferred from the genus Eutriatoma to Triatoma. Although included in the genus Triatoma, the phylogenetic position of T. tibiamaculata in relation to other species of this genus has always been uncertain once this triatomine was grouped in all phylogenies with the genus Panstrongylus, rescuing T. tibiamaculata and P. megistus as sister species. Thus, we evaluated the generic status of T. tibiamaculata using phylogenetic and chromosomal analysis. Methods Chromosomal (karyotype) and phylogenetic (with mitochondrial and nuclear markers) analyses were performed to assess the relationship between T. tibiamaculata and Panstrongylus spp. Results The chromosomal and phylogenetic relationship of T. tibiamaculata and Panstrongylus spp. confirms the transfer of the species to Panstrongylus with the new combination: Panstrongylus tibiamaculatus. Conclusions Based on chromosomal and phylogenetic characteristics, we state that P. tibiamaculatus comb. nov. belongs to the genus Panstrongylus and that the morphological features shared with Triatoma spp. represent homoplasies. Graphical Abstract ![]()
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Affiliation(s)
- Isadora Freitas Bittinelli
- Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP), Instituto de Biociências Rua Dr. Antônio Celso Wagner Zanin, 250, Distrito de Rubião Júnior, 18618-689, Botucatu, SP, Brasil
| | - Jader de Oliveira
- Laboratório de Entomologia em Saúde Pública, Departamento de Epidemiologia, Faculdade de Saúde Pública, Universidade de São Paulo (USP), Av. Dr. Arnaldo 715, São Paulo, SP, Brasil.,Laboratório de Parasitologia, Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP), Faculdade de Ciências Farmacêuticas, Rodovia Araraquara-Jaú km 1, 14801-902, Araraquara, SP, Brasil
| | - Yago Visinho Dos Reis
- Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP), Instituto de Biociências Rua Dr. Antônio Celso Wagner Zanin, 250, Distrito de Rubião Júnior, 18618-689, Botucatu, SP, Brasil
| | - Amanda Ravazi
- Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP), Instituto de Biociências Rua Dr. Antônio Celso Wagner Zanin, 250, Distrito de Rubião Júnior, 18618-689, Botucatu, SP, Brasil
| | - Fernanda Fernandez Madeira
- Laboratório de Biologia Celular, Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP), Instituto de Biociências, Letras e Ciências Exatas, Rua Cristóvão Colombo 2265, 15054-000, São José do Rio Preto, SP, Brasil
| | - Ana Beatriz Bortolozo de Oliveira
- Laboratório de Biologia Celular, Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP), Instituto de Biociências, Letras e Ciências Exatas, Rua Cristóvão Colombo 2265, 15054-000, São José do Rio Preto, SP, Brasil
| | - Giulia Montanari
- Laboratório de Parasitologia, Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP), Faculdade de Ciências Farmacêuticas, Rodovia Araraquara-Jaú km 1, 14801-902, Araraquara, SP, Brasil
| | - Ana Julia Chaves Gomes
- Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP), Instituto de Biociências Rua Dr. Antônio Celso Wagner Zanin, 250, Distrito de Rubião Júnior, 18618-689, Botucatu, SP, Brasil
| | - Laura Poloto Cesaretto
- Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP), Instituto de Biociências Rua Dr. Antônio Celso Wagner Zanin, 250, Distrito de Rubião Júnior, 18618-689, Botucatu, SP, Brasil
| | - Isabella da Silva Massarin
- Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP), Instituto de Biociências Rua Dr. Antônio Celso Wagner Zanin, 250, Distrito de Rubião Júnior, 18618-689, Botucatu, SP, Brasil
| | - Cleber Galvão
- Laboratório Nacional e Internacional de Referência em Taxonomia de Triatomíneos, Instituto Oswaldo Cruz (FIOCRUZ), Av. Brasil 4365, Pavilhão Rocha Lima, sala 505, 21040-360, Rio de Janeiro, RJ, Brasil.
| | - Maria Tercília Vilela de Azeredo-Oliveira
- Laboratório de Biologia Celular, Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP), Instituto de Biociências, Letras e Ciências Exatas, Rua Cristóvão Colombo 2265, 15054-000, São José do Rio Preto, SP, Brasil
| | - João Aristeu da Rosa
- Laboratório de Parasitologia, Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP), Faculdade de Ciências Farmacêuticas, Rodovia Araraquara-Jaú km 1, 14801-902, Araraquara, SP, Brasil
| | - Kaio Cesar Chaboli Alevi
- Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP), Instituto de Biociências Rua Dr. Antônio Celso Wagner Zanin, 250, Distrito de Rubião Júnior, 18618-689, Botucatu, SP, Brasil.,Laboratório de Entomologia em Saúde Pública, Departamento de Epidemiologia, Faculdade de Saúde Pública, Universidade de São Paulo (USP), Av. Dr. Arnaldo 715, São Paulo, SP, Brasil.,Laboratório de Parasitologia, Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP), Faculdade de Ciências Farmacêuticas, Rodovia Araraquara-Jaú km 1, 14801-902, Araraquara, SP, Brasil.,Laboratório Nacional e Internacional de Referência em Taxonomia de Triatomíneos, Instituto Oswaldo Cruz (FIOCRUZ), Av. Brasil 4365, Pavilhão Rocha Lima, sala 505, 21040-360, Rio de Janeiro, RJ, Brasil
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14
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Cruz DD, Arellano E. Molecular data confirm Triatoma pallidipennis Stål, 1872 (Hemiptera: Reduviidae: Triatominae) as a novel cryptic species complex. Acta Trop 2022; 229:106382. [PMID: 35189124 DOI: 10.1016/j.actatropica.2022.106382] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Revised: 02/17/2022] [Accepted: 02/17/2022] [Indexed: 12/11/2022]
Abstract
Triatoma pallidipennis constitues one of the most important Chagas disease vector in Mexico. Previous studies based on molecular data suggest T. pallidipennis as a complex of cryptic species. For that reason, we analyzed the phylogenetic relationships of T. pallidipennis using DNA sequences from the mitochondrial ND4 gene and the ITS-2 gene. In addition, the divergence times were estimated, and possible new taxa were delimited with three species delimitation methods. Finally, genetic distances and possible connectivity routes based on shared haplotypes were obtained among the T. pallidipennis populations. Five haplogroups (possible cryptic species) were found, based on delimitation methods and genetic distances. Haplogroup divergence began about 3 Ma, in the Pleistocene. Moreover, none of the haplogroups showed potential connectivity routes between them, evidencing lack of gene flow. Our results suggest the existence of a new cryptic species complex within what is currently recognized as a T. pallidipennis.
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Affiliation(s)
- Daryl D Cruz
- Centro de Investigación en Biodiversidad y Conservación (CIByC), UAEM, Cuernavaca, Morelos, Mexico
| | - Elizabeth Arellano
- Centro de Investigación en Biodiversidad y Conservación (CIByC), UAEM, Cuernavaca, Morelos, Mexico.
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15
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Moriconi DE, Macedo-Lopes C, Sartorio A, Juárez MP, Girotti JR, Calderón-Fernández GM. Chemotaxonomy of Five South American Species of the Triatoma genus (Hemiptera: Reduviidae: Triatominae) Based on Their Cuticle Hydrocarbon Pattern. JOURNAL OF MEDICAL ENTOMOLOGY 2022; 59:554-564. [PMID: 34893852 DOI: 10.1093/jme/tjab199] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Indexed: 06/14/2023]
Abstract
The Triatoma sordida subcomplex traditionally included four triatomine species, T. sordida, Triatoma garciabesi, Triatoma guasayana, and Triatoma patagonica, distributed in the Southern Cone of South America. These species have a large intraspecific variability together with an overall similarity, making difficult to establish their taxonomic status. Many cytogenetic, morphometric, and molecular markers have been applied to address this. Recent studies have posed concerns on the inclusion of T. guasayana and T. patagonica within the subcomplex. Also, T. sordida from Argentina has been designed as a new species, Triatoma rosai. Using the cuticular hydrocarbon pattern as chemotaxonomic marker, the relationships among several populations of these species were analyzed by capillary gas chromatography and linear discriminant analysis along 25 collection sites in Argentina, Bolivia, Brazil, and Paraguay. T. sordida and T. rosai populations were differentially clustered in two CHC-based groups: "Group 1" included T. sordida from Eastern Brazil, Eastern Paraguay, and the Bolivian populations from La Paz and Izozog G1; "Group 2" included T. rosai, and T. sordida from Izozog G2 (Bolivia), and Western Paraguay. Whereas T. garciabesi remained closely related to T. sordida and T. rosai, T. guasayana, and T. patagonica were clearly separated from the species of the T. sordida subcomplex. Our results agree with those from other several techniques suggesting that the taxonomy of the T. sordida subcomplex should be revised.
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Affiliation(s)
- Débora E Moriconi
- Instituto de Investigaciones Bioquímicas de La Plata (INIBIOLP), Facultad de Ciencias Médicas, La Plata, Argentina
| | - Catarina Macedo-Lopes
- Laboratório Interdisciplinar de Vigilância Entomológica em Diptera e Hemiptera, Instituto Oswaldo Cruz, Manguinhos, Rio de Janeiro, Brazil
| | - Adriana Sartorio
- School of Mathematical and Natural Sciences, Arizona State University, Glendale, AZ, USA
| | - M Patricia Juárez
- Instituto de Investigaciones Bioquímicas de La Plata (INIBIOLP), Facultad de Ciencias Médicas, La Plata, Argentina
| | - Juan R Girotti
- Instituto de Investigaciones Bioquímicas de La Plata (INIBIOLP), Facultad de Ciencias Médicas, La Plata, Argentina
| | - Gustavo M Calderón-Fernández
- Instituto de Investigaciones Bioquímicas de La Plata (INIBIOLP), Facultad de Ciencias Médicas, La Plata, Argentina
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16
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Pita S, Lorite P, Cuadrado A, Panzera Y, De Oliveira J, Alevi KCC, Rosa JA, Freitas SPC, Gómez-Palacio A, Solari A, Monroy C, Dorn PL, Cabrera-Bravo M, Panzera F. High chromosomal mobility of rDNA clusters in holocentric chromosomes of Triatominae, vectors of Chagas disease (Hemiptera-Reduviidae). MEDICAL AND VETERINARY ENTOMOLOGY 2022; 36:66-80. [PMID: 34730244 DOI: 10.1111/mve.12552] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2021] [Revised: 09/15/2021] [Accepted: 10/14/2021] [Indexed: 05/28/2023]
Abstract
The subfamily Triatominae (Hemiptera-Reduviidae) includes more than 150 blood-sucking species, potential vectors of the protozoan Trypanosoma cruzi, causative agent of Chagas disease. A distinctive cytogenetic characteristic of this group is the presence of extremely stable chromosome numbers. Unexpectedly, the analyses of the chromosomal location of ribosomal gene clusters and other repetitive sequences place Triatominae as a significantly diverse hemipteran subfamily. Here, we advance the understanding of Triatominae chromosomal evolution through the analysis of the 45S rDNA cluster chromosomal location in 92 Triatominae species. We found the 45S rDNA clusters in one to four loci per haploid genome with different chromosomal patterns: On one or two autosomes, on one, two or three sex chromosomes, on the X chromosome plus one to three autosomes. The movement of 45S rDNA clusters is discussed in an evolutionary context. Our results illustrate that rDNA mobility has been relatively common in the past and in recent evolutionary history of the group. The high frequency of rDNA patterns involving autosomes and sex chromosomes among closely related species could affect genetic recombination and the viability of hybrid populations, which suggests that the mobility of rDNA clusters could be a driver of species diversification.
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Affiliation(s)
- S Pita
- Sección Genética Evolutiva, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay
| | - P Lorite
- Department of Experimental Biology, Genetics, University of Jaén, Jaén, Spain
| | - A Cuadrado
- Department of Biomedicine and Biotechnology, University of Alcalá, Madrid, Spain
| | - Y Panzera
- Sección Genética Evolutiva, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay
| | - J De Oliveira
- Laboratório de Entomologia em Saúde Pública, Departamento de Epidemiologia, Faculdade de Saúde Pública, Universidade de São Paulo, São Paulo, Brazil
| | - K C C Alevi
- Faculdade de Ciências Farmacêuticas, Universidade Estadual Paulista "Júlio de Mesquita Filho" (Unesp), São Paulo, Brazil
| | - J A Rosa
- Faculdade de Ciências Farmacêuticas, Universidade Estadual Paulista "Júlio de Mesquita Filho" (Unesp), São Paulo, Brazil
| | | | - A Gómez-Palacio
- Laboratorio de Investigación en Genética Evolutiva - LIGE, Universidad Pedagógica y Tecnológica de Colombia, Tunja, Colombia
| | - A Solari
- Programa de Biología Celular y Molecular, ICBM, Facultad de Medicina, Universidad de Chile, Santiago, Chile
| | - C Monroy
- Laboratorio de Entomología Aplicada y Parasitología, Escuela de Biología, Facultad de Farmacia, Universidad de San Carlos de Guatemala, Guatemala City, Guatemala
| | - P L Dorn
- Department of Biological Sciences, Loyola University New Orleans, New Orleans, Louisiana, U.S.A
| | - M Cabrera-Bravo
- Departamento de Microbiología y Parasitología, Facultad de Medicina, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - F Panzera
- Sección Genética Evolutiva, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay
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Alevi KCC, de Oliveira J, da Silva Rocha D, Galvão C. Trends in Taxonomy of Chagas Disease Vectors (Hemiptera, Reduviidae, Triatominae): From Linnaean to Integrative Taxonomy. Pathogens 2021; 10:1627. [PMID: 34959582 PMCID: PMC8706908 DOI: 10.3390/pathogens10121627] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Revised: 12/07/2021] [Accepted: 12/10/2021] [Indexed: 11/23/2022] Open
Abstract
Chagas disease is a neglected tropical disease caused by the protozoan Trypanosoma cruzi and transmitted mainly by members of the subfamily Triatominae. There are currently 157 species, grouped into 18 genera and five tribes. Most descriptions of triatomine species are based on classical taxonomy. Facing evolutionary (cryptic speciation and phenotypic plasticity) and taxonomic (more than 190 synonymizations) problems, it is evident that integrative taxonomy studies are an important and necessary trend for this group of vectors. Almost two-and-a-half centuries after the description of the first species, we present for the first time the state-of-the-art taxonomy of the whole subfamily, covering from the initial classic studies to the use of integrative taxonomy.
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Affiliation(s)
- Kaio Cesar Chaboli Alevi
- Laboratório de Parasitologia, Faculdade de Ciências Farmacêuticas, Universidade Estadual Paulista “Júlio de Mesquita Filho” (UNESP), Rodovia Araraquara-Jaú km 1, Araraquara 14801-902, Brazil; (K.C.C.A.); (J.d.O.)
- Laboratório de Entomologia em Saúde Pública, Faculdade de Saúde Pública, Universidade de São Paulo (USP), Av. Dr. Arnaldo 715, São Paulo 01246-904, Brazil
- Laboratório Nacional e Internacional de Referência em Taxonomia de Triatomíneos, Instituto Oswaldo Cruz (FIOCRUZ), Av. Brasil 4365, Pavilhão Rocha Lima, Sala 505, Rio de Janeiro 21040-360, Brazil;
| | - Jader de Oliveira
- Laboratório de Parasitologia, Faculdade de Ciências Farmacêuticas, Universidade Estadual Paulista “Júlio de Mesquita Filho” (UNESP), Rodovia Araraquara-Jaú km 1, Araraquara 14801-902, Brazil; (K.C.C.A.); (J.d.O.)
- Laboratório de Entomologia em Saúde Pública, Faculdade de Saúde Pública, Universidade de São Paulo (USP), Av. Dr. Arnaldo 715, São Paulo 01246-904, Brazil
| | - Dayse da Silva Rocha
- Laboratório Nacional e Internacional de Referência em Taxonomia de Triatomíneos, Instituto Oswaldo Cruz (FIOCRUZ), Av. Brasil 4365, Pavilhão Rocha Lima, Sala 505, Rio de Janeiro 21040-360, Brazil;
| | - Cleber Galvão
- Laboratório Nacional e Internacional de Referência em Taxonomia de Triatomíneos, Instituto Oswaldo Cruz (FIOCRUZ), Av. Brasil 4365, Pavilhão Rocha Lima, Sala 505, Rio de Janeiro 21040-360, Brazil;
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Santander MD, Cabral-de-Mello DC, Taffarel A, Martí E, Martí DA, Palacios-Gimenez OM, Castillo ERD. New insights into the six decades of Mesa’s hypothesis of chromosomal evolution in Ommexechinae grasshoppers (Orthoptera: Acridoidea). Zool J Linn Soc 2021. [DOI: 10.1093/zoolinnean/zlaa188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Abstract
In Acridoidea grasshoppers, chromosomal rearrangements are frequently found as deviations from the standard acrocentric karyotype (2n = 23♂/24♀, FN = 23♂/24♀) in either phylogenetically unrelated species or shared by closely related ones, i.e. genus. In the South American subfamily Ommexechinae, most of the species show a unique karyotype (2n = 23♂/24♀, FN = 25♂/26♀) owing to the occurrence of a large autosomal pair (L1) with submetacentric morphology. In the early 1960s, Alejo Mesa proposed the hypothesis of an ancestral pericentric inversion to explain this karyotype variation. Furthermore, in Ommexechinae, extra chromosomal rearrangements (e.g. centric fusions) are recorded between the ancestral X chromosome and autosomes that originated the so-called neo-sex chromosomes. However, the evolutionary significance of the pericentric inversions and centric fusions in Ommexechinae remains poorly explored. Aiming for a better understanding of chromosomal evolution in Ommexechinae, we performed a detailed cytogenetic analysis in five species. Our findings support the hypothesis about the occurrence of an early pericentric inversion in the ancestor of Ommexechinae. Moreover, our results show a complex karyotype diversification pattern due to several chromosome rearrangements, variations in heterochromatin and repetitive DNA dynamics. Finally, the chromosomal mapping of U2 snDNA in L1 provided new insights about the morphological evolution of this autosomal pair and revealed unnoticed chromosome reorganizations.
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Affiliation(s)
- Mylena D Santander
- Laboratorio de Genética Evolutiva Dr. Claudio J. Bidau. Instituto de Biología Subtropical (IBS) CONICET-UNaM. FCEQyN. Posadas, Misiones, Argentina
- Departamento de Genética e Biologia Evolutiva. Instituto de Biociências, Universidade de São Paulo (USP). São Paulo, São Paulo, Brazil
| | - Diogo C Cabral-de-Mello
- Departamento de Biologia Geral e Aplicada, Universidade Estadual Paulista (UNESP), Instituto de Biociências/IB. Rio Claro, São Paulo, Brazil
| | - Alberto Taffarel
- Laboratorio de Genética Evolutiva Dr. Claudio J. Bidau. Instituto de Biología Subtropical (IBS) CONICET-UNaM. FCEQyN. Posadas, Misiones, Argentina
| | - Emiliano Martí
- Departamento de Biologia Geral e Aplicada, Universidade Estadual Paulista (UNESP), Instituto de Biociências/IB. Rio Claro, São Paulo, Brazil
| | - Dardo A Martí
- Laboratorio de Genética Evolutiva Dr. Claudio J. Bidau. Instituto de Biología Subtropical (IBS) CONICET-UNaM. FCEQyN. Posadas, Misiones, Argentina
| | - Octavio M Palacios-Gimenez
- Department of Organismal Biology – Systematic Biology Program, Evolutionary Biology Centre, Uppsala University
| | - Elio Rodrigo D Castillo
- Laboratorio de Genética Evolutiva Dr. Claudio J. Bidau. Instituto de Biología Subtropical (IBS) CONICET-UNaM. FCEQyN. Posadas, Misiones, Argentina
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Revisiting the Hybridization Processes in the Triatoma brasiliensis Complex (Hemiptera, Triatominae): Reproductive Isolation between Triatoma petrocchiae and T. b. brasiliensis and T. lenti. INSECTS 2021; 12:insects12111015. [PMID: 34821815 PMCID: PMC8621033 DOI: 10.3390/insects12111015] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 11/04/2021] [Accepted: 11/09/2021] [Indexed: 12/03/2022]
Abstract
Simple Summary Although all triatomines are potential vectors of Chagas disease, there are species with greater or lesser vectorial importance. Therefore, the correct identification of triatomine species is essential for vector control programs. In general, triatomines are identified by external morphological characters. However, some species are very similar or even morphologically identical, making the use of complementary analyses for the correct identification of species important. For this reason, this study focused on the use of experimental crosses to assess the specific status of species of the Triatoma brasiliensis species complex. The crosses did not result in hybrids, demonstrating that there are pre-zygotic reproductive barriers installed between T. petrocchiae and the other species of the T. brasiliensis complex (which confirms the specific status of the species according to the biological species concept). On the basis of the results above, we demonstrated that T. petrocchiae is reproductively isolated from T. b. brasiliensis and T. lenti. Furthermore, we suggest that T. petrocchiae is the species most derived from the T. brasiliensis complex. Abstract Triatoma petrocchiae is a species morphologically similar to T. b. brasiliensis (which resulted in a synonymization event); despite this similarity, genetic, morphological, and experimental crossbreeding studies confirmed the specific status of T. petrocchiae. Considering that both species have been reported living in sympatry and that, for a long time, most species of the T. brasiliensis complex were considered only chromatic variants of T. b. brasiliensis, we carried out experimental crosses between T. b. brasiliensis and T. petrocchiae (to confirm whether these species are reproductively isolated) and between T. lenti and T. petrocchiae (to assess whether T. petrocchiae also presents prezygotic isolation with the other species of the T. brasiliensis complex). Reciprocal experimental crosses were conducted, and weekly, the eggs were collected, counted, and separated in new containers to assess the hatch rate. Neither cross resulted in hybrids, demonstrating that there are pre-zygotic reproductive barriers installed between T. petrocchiae and the other species of the T. brasiliensis complex. On the basis of the results above, we demonstrated that T. petrocchiae is reproductively isolated from T. b. brasiliensis and T. lenti. Furthermore, we suggest that T. petrocchiae is the species most derived from the T. brasiliensis complex.
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Pinotti H, de Oliveira J, Ravazi A, Madeira FF, dos Reis YV, de Oliveira ABB, de Azeredo-Oliveira MTV, da Rosa JA, Alevi KCC. Revisiting the hybridization processes in the Triatoma brasiliensis complex (Hemiptera, Triatominae): Interspecific genomic compatibility point to a possible recent diversification of the species grouped in this monophyletic complex. PLoS One 2021; 16:e0257992. [PMID: 34653197 PMCID: PMC8519420 DOI: 10.1371/journal.pone.0257992] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Accepted: 09/15/2021] [Indexed: 11/24/2022] Open
Abstract
Triatomines are hematophagous insects of great epidemiological importance, since they are vectors of the protozoan Trypanosoma cruzi, the etiological agent of Chagas disease. Triatoma brasiliensis complex is a monophyletic group formed by two subspecies and six species: T. b. brasiliensis, T. b. macromelasoma, T. bahiensis, T. juazeirensis, T. lenti, T. melanica, T. petrocchiae and T. sherlocki. The specific status of several species grouped in the T. brasiliensis complex was confirmed from experimental crossing and analysis of reproductive barriers. Thus, we perform interspecific experimental crosses between T. lenti and other species and subspecies of the T. brasiliensis complex and perform morphological analysis of the gonads and cytogenetic analysis in the homeologous chromosomes of the hybrids of first generation (F1). Besides that, we rescue all the literature data associated with the study of reproductive barriers in this monophyletic complex of species and subspecies. For all crosses performed between T. b. brasiliensis, T. b. macromelasoma, T. juazeirensis and T. melanica with T. lenti, interspecific copulas occurred (showing absence of mechanical isolation), hybrids were obtained, none of the male hybrids presented the phenomenon of gonadal dysgenesis and 100% pairing between the chromosomes homeologous of the hybrids was observed. Thus, we demonstrate that there are no pre-zygotic reproductive barriers installed between T. lenti and the species and subspecies of the T. brasiliensis complex. In addition, we demonstrate that the hybrids obtained between these crosses have high genomic compatibility and the absence of gonadal dysgenesis. These results point to reproductive compatibility between T. lenti and species and subspecies of the T. brasiliensis complex (confirming its inclusion in the complex) and lead us to suggest a possible recent diversification of the taxa of this monophyletic group.
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Affiliation(s)
- Heloisa Pinotti
- Laboratório de Parasitologia, Departamento de Ciências Biológicas, Universidade Estadual Paulista “Júlio de Mesquita Filho” (UNESP), Faculdade de Ciências Farmacêuticas, Araraquara, São Paulo, Brasil
| | - Jader de Oliveira
- Laboratório de Parasitologia, Departamento de Ciências Biológicas, Universidade Estadual Paulista “Júlio de Mesquita Filho” (UNESP), Faculdade de Ciências Farmacêuticas, Araraquara, São Paulo, Brasil
| | - Amanda Ravazi
- Instituto de Biociências, Universidade Estadual Paulista “Júlio de Mesquita Filho”, IBB/UNESP, Botucatu, São Paulo, Brasil
| | - Fernanda Fernandez Madeira
- Laboratório de Biologia Celular, Departamento de Biologia, Instituto de Biociências, Letras e Ciências Exatas, Universidade Estadual Paulista “Júlio de Mesquita Filho”, IBILCE/UNESP, São José do Rio Preto, São Paulo, Brasil
| | - Yago Visinho dos Reis
- Instituto de Biociências, Universidade Estadual Paulista “Júlio de Mesquita Filho”, IBB/UNESP, Botucatu, São Paulo, Brasil
| | - Ana Beatriz Bortolozo de Oliveira
- Laboratório de Biologia Celular, Departamento de Biologia, Instituto de Biociências, Letras e Ciências Exatas, Universidade Estadual Paulista “Júlio de Mesquita Filho”, IBILCE/UNESP, São José do Rio Preto, São Paulo, Brasil
| | - Maria Tercília Vilela de Azeredo-Oliveira
- Laboratório de Biologia Celular, Departamento de Biologia, Instituto de Biociências, Letras e Ciências Exatas, Universidade Estadual Paulista “Júlio de Mesquita Filho”, IBILCE/UNESP, São José do Rio Preto, São Paulo, Brasil
| | - João Aristeu da Rosa
- Laboratório de Parasitologia, Departamento de Ciências Biológicas, Universidade Estadual Paulista “Júlio de Mesquita Filho” (UNESP), Faculdade de Ciências Farmacêuticas, Araraquara, São Paulo, Brasil
| | - Kaio Cesar Chaboli Alevi
- Laboratório de Parasitologia, Departamento de Ciências Biológicas, Universidade Estadual Paulista “Júlio de Mesquita Filho” (UNESP), Faculdade de Ciências Farmacêuticas, Araraquara, São Paulo, Brasil
- Instituto de Biociências, Universidade Estadual Paulista “Júlio de Mesquita Filho”, IBB/UNESP, Botucatu, São Paulo, Brasil
- * E-mail:
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21
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Characterization of Female External Genitalia and Eggs of Four South American Species of the Triatoma Laporte, 1832 Genus (Hemiptera: Reduviidae: Triatominae). INSECTS 2021; 12:insects12060537. [PMID: 34200545 PMCID: PMC8229054 DOI: 10.3390/insects12060537] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 04/08/2021] [Accepted: 04/09/2021] [Indexed: 11/16/2022]
Abstract
Simple Summary We present a morphological and morphometric study with T. garciabesi, T. guasayana, T. patagonica, and T. sordida sensu stricto species within the Triatoma genus. This group of species is important for the eco-epidemic scenario of Chagas disease in the Americas; their species have morphological, biological, and behavioral similarities that make diagnosis difficult. For the first time, the description of the female external genitalia by scanning electron microscopy (SEM), a character that has helped with the delimitation of species and genera in Triatominae, is published, in addition to presenting an extensive study with eggs, covering morphology and morphometry. The study with eggs is an important tool in taxonomic studies of the subfamily. In addition to taxonomic contributions, it was possible through the descriptions to corroborate the validity of T. garciabesi and confirm the current classification of these species. Abstract Triatoma is the most diversified and one of the most important genera from an epidemiological perspective. Given the difficulty in identifying some species of the Triatoma genus, morphological, histological, and morphometric studies were performed to provide new characters that make it possible to differentiate T. garciabesi, T. guasayana, T. patagonica, and T. sordida sensu stricto, triatomines that overlap geographically and have vector potential. Through the external female genitalia, as well as morphology, morphometry, and histology of eggshells, it was possible to discriminate the four species. In addition, this study reinforces the taxonomic validity of T. garciabesi and provides new data for discussion on systematic issues of T. guasayana and T. patagonica.
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Gonzalez Britez NE, Alevi KCC, Caris Garcia AC, Martínez Purroy CE, Galvão C, Carrasco HJ. Chagas Disease Vectors of Paraguay: Entomoepidemiological Aspects of Triatoma sordida (Stål, 1859) and Development of an Identification Key for Paraguayan Triatomines Based on Cytogenetics Data. Am J Trop Med Hyg 2021; 105:130-133. [PMID: 34097644 DOI: 10.4269/ajtmh.20-1454] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Accepted: 03/22/2021] [Indexed: 11/07/2022] Open
Abstract
Approximately 150,000 people are living with Chagas disease in Paraguay. Although the country has been since 2008 considered as one of the countries that succeeded in interrupted the vector transmission of Chagas by Triatoma infestans in houses of the eastern region, there are nine other species notified in the country that are potential vectors and also deserve attention from vector control programs. Thus, we carried out an entomoepidemiological study of T. sordida in the eastern and western regions of the country and we developed an identification key for Paraguay's triatomines based on cytogenetic data. Between the years 2003 to 2004, 271 specimens of T. sordida were captured in domestic, peridomestic, and wild ecotopes, with 131 insects caught in the eastern (Alto Paraguay, Boquerón and Pte. Hayes) and 140 in the western region of Paraguay (Guairá and Paraguarí). High rates of peridomicillary infestation were observed for both regions. Besides that, the natural infection of the captured insects was detected by optical microscopy in 12% and 10%, and by PCR in 21% and 20% in the eastern and western regions, respectively. Based on cytogenetic data from nine of ten species notified in Paraguay, an identification key was developed to differentiate all taxa. Thus, given the vectorial importance of T. sordida, we highlight the need for continued attention from Paraguay's vector control programs for this species. Further, we provide a taxonomic key that assists in the correct classification of Paraguayan triatomines.
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Affiliation(s)
- Nilsa Elizabeth Gonzalez Britez
- 1Departamento de Medicina Tropical, Instituto de Investigaciones en Ciencias de la Salud (IICS), Universidad Nacional de Asunción, Campus Universitario, San Lorenzo, Paraguay
| | - Kaio Cesar Chaboli Alevi
- 2Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP), Instituto de Biociências de Botucatu, Rua Dr. Antônio Celso Wagner Zanin, Distrito de Rubião Junior, Botucatu, SP, Brazil.,3Laboratório de Parasitologia, Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP), Faculdade de Ciências Farmacêuticas, Rodovia Araraquara-Jaú km 1, Araraquara, SP, Brazil
| | - Ariane Cristina Caris Garcia
- 2Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP), Instituto de Biociências de Botucatu, Rua Dr. Antônio Celso Wagner Zanin, Distrito de Rubião Junior, Botucatu, SP, Brazil
| | - Clara Elena Martínez Purroy
- 4Laboratorio de Biología Molecular de Protozoarios, Facultad de Medicina, Instituto de Medicina Tropical, Universidad Central de Venezuela, Los Chaguaramos, Caracas, Venezuela
| | - Cleber Galvão
- 5Laboratório Nacional e Internacional de Referência em Taxonomia de Triatomíneos, Instituto Oswaldo Cruz (FIOCRUZ), Pavilhão Rocha Lima, Rio de Janeiro, RJ, Brazil
| | - Hernán José Carrasco
- 4Laboratorio de Biología Molecular de Protozoarios, Facultad de Medicina, Instituto de Medicina Tropical, Universidad Central de Venezuela, Los Chaguaramos, Caracas, Venezuela
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Belintani T, Oliveira J, Pinotti H, Silva LA, Alevi KCC, Galvão C, Rosa JAD. Phylogenetic and phenotypic relationships of the Triatoma sordida subcomplex (Hemiptera: Reduviidae: Triatominae). Acta Trop 2020; 212:105679. [PMID: 32860747 DOI: 10.1016/j.actatropica.2020.105679] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 08/23/2020] [Accepted: 08/24/2020] [Indexed: 11/29/2022]
Abstract
Chagas disease, whose etiological agent is the protozoan Trypanosoma cruzi, affects millions of people worldwide and it is mainly transmitted by infected triatomine feces. Triatoma is the most diverse genus and one of the most important from an epidemiological point of view. Species of this genus are grouped into eight complexes and nine subcomplexes. Triatoma sordida subcomplex consists of T. garciabesi, T. guasayana, T. patagonica, and, T. sordida. Given the recent discussions on their phylogenetic status, this study aims to evaluate morphometric and genetics characters that group and distinguish T. garciabesi, T. guasayana, T. patagonica, and T. sordida, as well as to infer the phylogenetic relationships within the group and evaluate the proximity with T. rubrovaria subcomplex. The results corroborate the phylogenetic relationship of T. guasayana and T. patagonica with the T. rubrovaria subcomplex. Molecular data confirm the proximity of T. jurbergi, T. matogrossensis, T. vandae as T. garciabesi, and T. sordida. Together, genetic variability was shown between T. sordida populations.
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Affiliation(s)
- Tiago Belintani
- Institute of Biology, Campinas State University (Unicamp), Block O, Bertrand Russel Avenue, Campinas, São Paulo 13083-865, Brazil..
| | - Jader Oliveira
- São Paulo State University (Unesp), School of Pharmaceutical Sciences, Araraquara-Jaú Highway, km 1, Campos Ville, Araraquara, São Paulo 14800-903, Brazil
| | - Heloisa Pinotti
- São Paulo State University (Unesp), School of Pharmaceutical Sciences, Araraquara-Jaú Highway, km 1, Campos Ville, Araraquara, São Paulo 14800-903, Brazil
| | - Lucas Abrantes Silva
- São Paulo State University (Unesp), School of Pharmaceutical Sciences, Araraquara-Jaú Highway, km 1, Campos Ville, Araraquara, São Paulo 14800-903, Brazil
| | - Kaio Cesar Chaboli Alevi
- São Paulo State University (Unesp), School of Pharmaceutical Sciences, Araraquara-Jaú Highway, km 1, Campos Ville, Araraquara, São Paulo 14800-903, Brazil
| | - Cleber Galvão
- Laboratório Nacional e Internacional de Referência em Taxonomia de Triatomíneos, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, Brazil
| | - João Aristeu da Rosa
- Institute of Biology, Campinas State University (Unicamp), Block O, Bertrand Russel Avenue, Campinas, São Paulo 13083-865, Brazil.; São Paulo State University (Unesp), School of Pharmaceutical Sciences, Araraquara-Jaú Highway, km 1, Campos Ville, Araraquara, São Paulo 14800-903, Brazil
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Alevi KCC, de Oliveira J, Garcia ACC, Cristal DC, Delgado LMG, de Freitas Bittinelli I, dos Reis YV, Ravazi A, de Oliveira ABB, Galvão C, de Azeredo-Oliveira MTV, Madeira FF. Triatoma rosai sp. nov. (Hemiptera, Triatominae): A New Species of Argentinian Chagas Disease Vector Described Based on Integrative Taxonomy. INSECTS 2020; 11:insects11120830. [PMID: 33255910 PMCID: PMC7759825 DOI: 10.3390/insects11120830] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Revised: 10/13/2020] [Accepted: 10/15/2020] [Indexed: 01/01/2023]
Abstract
Simple Summary Although all triatomines are potential vectors of Chagas' disease, there are species with greater or lesser vectorial importance. Therefore, the correct identification of triatomines species is essential for the vector control programs. In general, triatomines are identified by external morphological characters. However, some species are very similar or even morphologically identical, being important the use of complementary analyses for the correct identification of species. For this reason, this study focused on the use of morphological, morphometric, molecular data, and experimental crosses to describe Triatoma rosai sp. nov., a new species of Argentinian Chagas disease vector. Significant morphological and morphometric differences, associated with phylogenetic support and high mortality rate of the hybrids made it possible to confirm the specific status of T. rosai sp. nov., emphasizing the importance of integrative analyses for the taxonomy of triatomines. Abstract 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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Affiliation(s)
- Kaio Cesar Chaboli Alevi
- Laboratório de Parasitologia, Faculdade de Ciências Farmacêuticas, Universidade Estadual Paulista “Júlio de Mesquita Filho” (UNESP), Rodovia Araraquara-Jaú km 1, 14801-902 Araraquara, SP, Brazil; (K.C.C.A.); (J.d.O.); (D.C.C.)
- Instituto de Biociências de Botucatu, Universidade Estadual Paulista “Júlio de Mesquita Filho” (UNESP), Rua Dr. Antônio Celso Wagner Zanin, 250, Distrito de Rubião Junior, 18618-689 Botucatu, SP, Brazil; (A.C.C.G.); (L.M.G.D.); (I.d.F.B.); (Y.V.d.R.); (A.R.)
| | - Jader de Oliveira
- Laboratório de Parasitologia, Faculdade de Ciências Farmacêuticas, Universidade Estadual Paulista “Júlio de Mesquita Filho” (UNESP), Rodovia Araraquara-Jaú km 1, 14801-902 Araraquara, SP, Brazil; (K.C.C.A.); (J.d.O.); (D.C.C.)
| | - Ariane Cristina Caris Garcia
- Instituto de Biociências de Botucatu, Universidade Estadual Paulista “Júlio de Mesquita Filho” (UNESP), Rua Dr. Antônio Celso Wagner Zanin, 250, Distrito de Rubião Junior, 18618-689 Botucatu, SP, Brazil; (A.C.C.G.); (L.M.G.D.); (I.d.F.B.); (Y.V.d.R.); (A.R.)
| | - Daniel Cesaretto Cristal
- Laboratório de Parasitologia, Faculdade de Ciências Farmacêuticas, Universidade Estadual Paulista “Júlio de Mesquita Filho” (UNESP), Rodovia Araraquara-Jaú km 1, 14801-902 Araraquara, SP, Brazil; (K.C.C.A.); (J.d.O.); (D.C.C.)
| | - Luiza Maria Grzyb Delgado
- Instituto de Biociências de Botucatu, Universidade Estadual Paulista “Júlio de Mesquita Filho” (UNESP), Rua Dr. Antônio Celso Wagner Zanin, 250, Distrito de Rubião Junior, 18618-689 Botucatu, SP, Brazil; (A.C.C.G.); (L.M.G.D.); (I.d.F.B.); (Y.V.d.R.); (A.R.)
| | - Isadora de Freitas Bittinelli
- Instituto de Biociências de Botucatu, Universidade Estadual Paulista “Júlio de Mesquita Filho” (UNESP), Rua Dr. Antônio Celso Wagner Zanin, 250, Distrito de Rubião Junior, 18618-689 Botucatu, SP, Brazil; (A.C.C.G.); (L.M.G.D.); (I.d.F.B.); (Y.V.d.R.); (A.R.)
| | - Yago Visinho dos Reis
- Instituto de Biociências de Botucatu, Universidade Estadual Paulista “Júlio de Mesquita Filho” (UNESP), Rua Dr. Antônio Celso Wagner Zanin, 250, Distrito de Rubião Junior, 18618-689 Botucatu, SP, Brazil; (A.C.C.G.); (L.M.G.D.); (I.d.F.B.); (Y.V.d.R.); (A.R.)
| | - Amanda Ravazi
- Instituto de Biociências de Botucatu, Universidade Estadual Paulista “Júlio de Mesquita Filho” (UNESP), Rua Dr. Antônio Celso Wagner Zanin, 250, Distrito de Rubião Junior, 18618-689 Botucatu, SP, Brazil; (A.C.C.G.); (L.M.G.D.); (I.d.F.B.); (Y.V.d.R.); (A.R.)
| | - Ana Beatriz Bortolozo de Oliveira
- Laboratório de Biologia Celular, Instituto de Biociências, Universidade Estadual Paulista “Júlio de Mesquita Filho” (UNESP), Letras e Ciências Exatas, Rua Cristóvão Colombo 2265, 15054-000 São José do Rio Preto, SP, Brazil; (A.B.B.d.O.); (M.T.V.d.A.-O.); (F.F.M.)
| | - Cleber Galvão
- Laboratório Nacional e Internacional de Referência em Taxonomia de Triatomíneos, Instituto Oswaldo Cruz (FIOCRUZ), Av. Brazil 4365, Pavilhão Rocha Lima, sala 505, 21040-360 Rio de Janeiro, RJ, Brazil
- Correspondence:
| | - Maria Tercília Vilela de Azeredo-Oliveira
- Laboratório de Biologia Celular, Instituto de Biociências, Universidade Estadual Paulista “Júlio de Mesquita Filho” (UNESP), Letras e Ciências Exatas, Rua Cristóvão Colombo 2265, 15054-000 São José do Rio Preto, SP, Brazil; (A.B.B.d.O.); (M.T.V.d.A.-O.); (F.F.M.)
| | - Fernanda Fernandez Madeira
- Laboratório de Biologia Celular, Instituto de Biociências, Universidade Estadual Paulista “Júlio de Mesquita Filho” (UNESP), Letras e Ciências Exatas, Rua Cristóvão Colombo 2265, 15054-000 São José do Rio Preto, SP, Brazil; (A.B.B.d.O.); (M.T.V.d.A.-O.); (F.F.M.)
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Teves SC, Gonçalves TCM, de Freitas SPC, Lopes CM, Carbajal-de-la-Fuente AL, Dos Santos-Mallet JR. External female genitalia of Triatoma jatai, Triatoma costalimai and Triatoma williami (Hemiptera: Reduviidae: Triatominae). Parasit Vectors 2020; 13:538. [PMID: 33121526 PMCID: PMC7597029 DOI: 10.1186/s13071-020-04418-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Accepted: 10/21/2020] [Indexed: 12/02/2022] Open
Abstract
Background Taxonomic identification of triatomines is generally performed based on aspects of their external morphology. However, the use of a multidisciplinary approach, considering morphological aspects of the external genitalia, morphometry, genetics, and phylogeography has been suggested, especially for similar and/or cryptic species. The rupestral species Triatoma jatai Gonçalves et al., 2013, Triatoma costalimai Verano & Galvão, 1959 and Triatoma williami Galvão et al., 1965, which are morphologically similar, have been found naturally infected with Trypanosoma cruzi (Chagas, 1909) in wild, peridomestic, and intradomestic environments, representing a risk of new outbreaks of Chagas disease. This study presents morphological description complementation of these species, with an emphasis on the structures of the female external genitalia, using scanning electron microscopy. Methods The females of T. jatai and T. costalimai (n = 10 of each) were captured in the Brazilian municipalities of Paranã and Aurora do Tocantins and were identified with the use of a dichotomous key for the Matogrossensis subcomplex. Females of T. williami (n = 5), were obtained from a laboratory colony. The females were cut transversely at the sixth abdominal segment and examined under scanning electron microscopy (SEM) at the Oswaldo Cruz/Fiocruz Institute Electronic Microscopy Platform. Results It was possible to differentiate the three species based on the characteristics of urotergites VII, VIII and IX and urosternite VII, as well as the genital plaques, gonocoxites, and gonapophyses. To our knowledge, morphological differences in the spines present on gonapophysis 8 in triatomines are described here for the first time. Conclusions The results show that external genitalia of females are useful structures to differentiate T. costalimai, T. jatai and T. williami. SEM analysis contributes to and corroborates, together with other tools morphological and molecular, the distinction of the three species.![]()
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Affiliation(s)
- Simone Caldas Teves
- Laboratório Interdisciplinar de Vigilância Entomológica em Diptera e Hemiptera, Instituto Oswaldo Cruz - Fiocruz, Rio de Janeiro, Brasil.
| | - Teresa Cristina Monte Gonçalves
- Laboratório Interdisciplinar de Vigilância Entomológica em Diptera e Hemiptera, Instituto Oswaldo Cruz - Fiocruz, Rio de Janeiro, Brasil
| | | | - Catarina Macedo Lopes
- Laboratório Interdisciplinar de Vigilância Entomológica em Diptera e Hemiptera, Instituto Oswaldo Cruz - Fiocruz, Rio de Janeiro, Brasil
| | - Ana Laura Carbajal-de-la-Fuente
- Centro Nacional de Diagnóstico e Investigación en Endemo-Epidemias (CeNDIE), Administración Nacional de Laboratorios e Institutos de Salud "Dr. Carlos Malbrán" (ANLIS), Ciudad Autónoma de Buenos Aires, Argentina.,Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma de Buenos Aires, Argentina
| | - Jacenir Reis Dos Santos-Mallet
- Laboratório Interdisciplinar de Vigilância Entomológica em Diptera e Hemiptera, Instituto Oswaldo Cruz - Fiocruz, Rio de Janeiro, Brasil.,Departamento de Ciências Biológicas, Universidade Iguaçu (UNIG), Nova Iguaçu, Rio de Janeiro, Brasil
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Madeira FF, Delgado LMG, Bittinelli IDF, Sartori RQ, Oliveira JD, Rosa JAD, Azeredo-Oliveira MTVD, Alevi KCC. Revisiting the genetic variability of Brazilian peridomestic populations of the Chagas disease vector Triatoma sordida () (Hemiptera, Triatominae). INFECTION GENETICS AND EVOLUTION 2020; 85:104568. [PMID: 32980578 DOI: 10.1016/j.meegid.2020.104568] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2020] [Revised: 09/07/2020] [Accepted: 09/21/2020] [Indexed: 01/14/2023]
Abstract
Triatoma sordida is an endemic species to South America, currently considered the species most frequently found in the peridomestic environment in Brazil. This triatomine has a wide ecological tolerability that allows it to inhabit several ecotopes and use different food sources. Although the species is considered predominantly peridomestic, it is also capable of colonizing households and forming numerous intra-household colonies, leading to its inclusion among the priorities for triatomine control campaigns in Brazil. All Brazilian populations of T. sordida are considered as T. sordida sensu stricto by chromosomal analyses (which highlights their epidemiological importance), although molecular studies that characterize the genetic diversity of these populations are scarce, being restricted only to the region of Minas Gerais. Thus, several populations of this vector distributed in the states of Bahia, Goiás, Mato Grosso do Sul, and Minas Gerais were analyzed using mitochondrial markers (cyt b and nd1). Low nucleotide diversity, high haplotypic diversity, low genetic distance, and high FST value were observed, as well as the formation of a monophyletic clade of the Brazilian populations of T. sordida, which confirms that this species has low genetic variability, with all specimens in Brazil grouped in T. sordida sensu stricto. In addition to the genetic and evolutionary importance for the knowledge of the biology of these vectors, these results are important from an epidemiological point of view, thus being able to direct vector control programs.
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Affiliation(s)
- Fernanda Fernandez Madeira
- Instituto de Biociências, Letras e Ciências Exatas, Universidade Estadual Paulista "Júlio de Mesquita Filho", IBILCE/UNESP, Rua Cristóvão Colombo 2265, 15054-000 São José do Rio Preto, SP, Brazil
| | - Luiza Maria Grzyb Delgado
- Instituto de Biociências de Botucatu, Universidade Estadual Paulista "Júlio de Mesquita Filho", IBB/UNESP, Rua Dr. Antônio Celso Wagner Zanin, 250, Distrito de Rubião Junior, 18618-689 Botucatu, SP, Brazil
| | - Isadora de Freitas Bittinelli
- Instituto de Biociências de Botucatu, Universidade Estadual Paulista "Júlio de Mesquita Filho", IBB/UNESP, Rua Dr. Antônio Celso Wagner Zanin, 250, Distrito de Rubião Junior, 18618-689 Botucatu, SP, Brazil
| | - Ricardo Quitério Sartori
- Instituto de Biociências, Letras e Ciências Exatas, Universidade Estadual Paulista "Júlio de Mesquita Filho", IBILCE/UNESP, Rua Cristóvão Colombo 2265, 15054-000 São José do Rio Preto, SP, Brazil
| | - Jader de Oliveira
- Faculdade de Ciências Farmacêuticas, Universidade Estadual Paulista "Júlio de Mesquita Filho", FCFAR/UNESP, Rodovia Araraquara-Jaú km 1, 14801-902 Araraquara, SP, Brazil
| | - João Aristeu da Rosa
- Faculdade de Ciências Farmacêuticas, Universidade Estadual Paulista "Júlio de Mesquita Filho", FCFAR/UNESP, Rodovia Araraquara-Jaú km 1, 14801-902 Araraquara, SP, Brazil
| | - Maria Tercília Vilela de Azeredo-Oliveira
- Instituto de Biociências, Letras e Ciências Exatas, Universidade Estadual Paulista "Júlio de Mesquita Filho", IBILCE/UNESP, Rua Cristóvão Colombo 2265, 15054-000 São José do Rio Preto, SP, Brazil
| | - Kaio Cesar Chaboli Alevi
- Instituto de Biociências de Botucatu, Universidade Estadual Paulista "Júlio de Mesquita Filho", IBB/UNESP, Rua Dr. Antônio Celso Wagner Zanin, 250, Distrito de Rubião Junior, 18618-689 Botucatu, SP, Brazil; Faculdade de Ciências Farmacêuticas, Universidade Estadual Paulista "Júlio de Mesquita Filho", FCFAR/UNESP, Rodovia Araraquara-Jaú km 1, 14801-902 Araraquara, SP, Brazil..
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Identifying Chagas disease vectors using elliptic Fourier descriptors of body contour: a case for the cryptic dimidiata complex. Parasit Vectors 2020; 13:332. [PMID: 32611375 PMCID: PMC7329423 DOI: 10.1186/s13071-020-04202-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Accepted: 06/20/2020] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Triatoma dimidiata (Reduviidae: Triatominae) is an important vector of Chagas disease in various countries in the Americas. Phylogenetic studies have defined three lineages in Mexico and part of Central America. While there is a marked genetic differentiation, methods for identifying them using morphometric analyses with landmarks have not yet been fully resolutive. Elliptical Fourier descriptors (EFDs), which mathematically describe the shape of any closed two-dimensional contours, could be a potentially useful alternative method. Our objective was to validate the use of EFDs for the identification of three lineages of this species complex. METHOD A total of 84 dorsal view images of individuals of the three lineages were used. Body contours were described with EFDs using between 5 and 30 harmonics. The number of obtained coefficients was reduced by a principal components analysis and the first axis scores were used as shape variables. A linear discriminant function analysis and an ordination plot of the discriminant analysis were performed using the shape variables. A confusion matrix of the ordination plot of the discriminant analysis was obtained to estimate the classification errors, the first five PC scores were statistically compared, and a neural network were then performed using the shape variables. RESULTS The first principal component explained 50% of the variability, regardless the number of harmonics used. The results of discriminant analysis get improved by increasing the number of harmonics and components considered. With 25 harmonics and 30 components, the identification of haplogroups was achieved with an overall efficiency greater than 97%. The ordering diagram showed the correct discrimination of haplogroups, with only one error of discrimination corroborated by the confusion matrix. When comparing the first five PC scores, significant differences were found among at least two haplogroups. The 30 multilayer perceptron neural networks were also efficient in identification, reaching 91% efficiency with the validation data. CONCLUSIONS The use of EFD is a simple and useful method for the identification of the main lineages of Triatoma dimidiata, with high values of correct identification.
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de Oliveira J, Chaboli Alevi KC, Almeida CE, Mendonça VJ, Costa J, da Rosa JA. Triatoma brasiliensis species complex: characterization of the external female genitalia. JOURNAL OF VECTOR ECOLOGY : JOURNAL OF THE SOCIETY FOR VECTOR ECOLOGY 2020; 45:57-68. [PMID: 32492272 DOI: 10.1111/jvec.12373] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Accepted: 01/25/2020] [Indexed: 06/11/2023]
Abstract
The Triatoma brasiliensis complex is composed of six species (Triatoma bahiensis, T. juazerensis, T. lenti, T. melanica, T. petrocchiae, and T. sherlocki) and two subspecies (T. brasiliensis brasiliensis and T. b. macromelasoma). Phylogenetic studies have shown that it is a monophyletic group, but the morphological relationships among the members can be better understood. We applied a tool of high resolution based on morphology to identify details that characterize the female genitals for each member of this group. The external genital structures of five to fifteen females of each taxon were analyzed. Insects had their abdomen transversely cut to separate the last abdominal segments, and representative illustrations obtained via scanning electron microscopy (SEM) are shown. Observations were performed in the dorsal and the ventral views. The morphological characterization of female external genitalia allowed a differentiation of each species/subspecies. The subspecies T. b. brasiliensis and T. b. macromelasoma were the most similar. On the other hand, dorsal view of structures evidenced some unique characteristics for T. petrocchiae and T. sherlocki. Regarding these structures for T. petrocchiae, the differentiation was in accordance with molecular studies, since this species exhibits the highest genetic distances in relation to other species of T. brasiliensis complex.
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Affiliation(s)
- Jader de Oliveira
- Universidade Estadual Paulista (UNESP), Faculdade de Ciências Farmacêuticas, Campus Araraquara, São Paulo, Brasil
| | - Kaio Cesar Chaboli Alevi
- Universidade Estadual Paulista (UNESP), Faculdade de Ciências Farmacêuticas, Campus Araraquara, São Paulo, Brasil
| | | | | | - Jane Costa
- Laboratório de Biodiversidade Entomológica, Instituto Oswaldo Cruz (IOC), FIOCRUZ, Brasil
| | - João Aristeu da Rosa
- Universidade Estadual Paulista (UNESP), Faculdade de Ciências Farmacêuticas, Campus Araraquara, São Paulo, Brasil
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Prezygotic isolation confirms the exclusion of Triatoma melanocephala, T. vitticeps and T. tibiamaculata of the T. brasiliensis subcomplex (Hemiptera, Triatominae). INFECTION GENETICS AND EVOLUTION 2020; 79:104149. [DOI: 10.1016/j.meegid.2019.104149] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Revised: 12/16/2019] [Accepted: 12/17/2019] [Indexed: 11/22/2022]
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de Souza-Firmino TS, Alevi KCC, Itoyama MM. Chromosomal divergence and evolutionary inferences in Pentatomomorpha infraorder (Hemiptera, Heteroptera) based on the chromosomal location of ribosomal genes. PLoS One 2020; 15:e0228631. [PMID: 32017800 PMCID: PMC6999898 DOI: 10.1371/journal.pone.0228631] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Accepted: 01/21/2020] [Indexed: 11/23/2022] Open
Abstract
With the objective of assisting in the understanding of the chromosome evolution of Pentatomomorpha and in the quest to understand how the genome organizes/reorganizes for the chromosomal position of the 45S rDNA in this infraorder, we analyzed 15 species (it has being 12 never studied before by FISH) of Pentatomomorpha with the probe of 18S rDNA. The mapping of the 45S gene in the Coreidae family demonstrated that the species presented markings on the autosomes, with the exception of Acanthocephala parensis and Leptoglossus gonagra that showed markers on m-chromosomes. Most species of the Pentatomidae family showed marking in the autosomes, except for two species that had 45S rDNA on X sex chromosome (Odmalea sp. and Graphosoma lineatum) and two that showed marking on the X and Y sex chromosomes. Species of the Pyrrhocoridae family showed 18S rDNA markers in autosomes, X chromosome as well as in Neo X. The Largidae and Scutelleridae families were represented by only one species that showed marking on the X sex chromosome and on a pair of autosomes, respectively. Based on this, we characterized the arrangement of 45S DNAr in the chromosomes of 12 new species of Heteroptera and discussed the main evolutionary events related to the genomic reorganization of these species during the events of chromosome and karyotype evolution in Pentatomomorpha infraorder.
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Affiliation(s)
- Tatiani Seni de Souza-Firmino
- Departamento de Biologia, Instituto de Biociências, Letras e Ciências Exatas, Universidade Estadual Paulista “Júlio de Mesquita Filho”, Câmpus de São José do Rio Preto, São José do Rio Preto, SP, Brazil
| | - Kaio Cesar Chaboli Alevi
- Departamento de Ciências Biológicas, Faculdade de Ciências Farmacêuticas de Araraquara, Universidade Estadual Paulista “Júlio de Mesquita Filho”, Câmpus de Araraquara, Araraquara, SP, Brazil
| | - Mary Massumi Itoyama
- Departamento de Biologia, Instituto de Biociências, Letras e Ciências Exatas, Universidade Estadual Paulista “Júlio de Mesquita Filho”, Câmpus de São José do Rio Preto, São José do Rio Preto, SP, Brazil
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Borsatto KC, Vilela Azeredo-Oliveira MT, Alevi KCC. Identification Key for the Chagas Disease Vectors of Five Brazilian States, Based on Cytogenetic Data. Am J Trop Med Hyg 2019; 100:303-305. [PMID: 30560768 DOI: 10.4269/ajtmh.18-0075] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Chagas disease is a public health problem caused by the protozoan Trypanosoma cruzi that affects about 8 million people worldwide. The main form of transmission of T. cruzi is vectorial, through triatomines feces contaminated with the parasite. All species are considered as potential vectors of T. cruzi. The main identification keys of these vectors are based only on morphological characters. However, there are very similar or even same species (cryptic species) that may lead to wrong classification of the vectors. Therefore, we developed an identification key using cytogenetic data, to aid and help the correct classification of triatomines. From the cytogenetic characters, identification keys were created for the five Brazilian states (Alagoas, Amapá, Ceará, Roraima, and Santa Catarina). These data are important because the correct classification of triatomines helps directly the activity of the vector control programs.
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Affiliation(s)
- Kelly Cristine Borsatto
- Laboratório de Biologia Celular, Departamento de Biologia, Instituto de Biociências, Letras e Ciências Exatas, Universidade Estadual Paulista "Júlio de Mesquita Filho", IBILCE/UNESP, São José do Rio Preto, São Paulo, Brazil
| | - Maria Tercília Vilela Azeredo-Oliveira
- Laboratório de Biologia Celular, Departamento de Biologia, Instituto de Biociências, Letras e Ciências Exatas, Universidade Estadual Paulista "Júlio de Mesquita Filho", IBILCE/UNESP, São José do Rio Preto, São Paulo, Brazil
| | - Kaio Cesar Chaboli Alevi
- Laboratório de Biologia Celular, Departamento de Biologia, Instituto de Biociências, Letras e Ciências Exatas, Universidade Estadual Paulista "Júlio de Mesquita Filho", IBILCE/UNESP, São José do Rio Preto, São Paulo, Brazil
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Borsatto KC, Alevi KCC, Oliveira J, Azeredo-Oliveira MTV. Cytotaxonomy of Dipetalogaster maxima Uhler, 1894 (Hemiptera, Reduviidae, Triatominae). BRAZ J BIOL 2019; 80:330-335. [PMID: 31721898 DOI: 10.1590/1519-6984.204384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Accepted: 10/31/2018] [Indexed: 11/21/2022] Open
Abstract
The Triatomini tribe consists of ten genera and is regarded as one of the most important tribes from epidemiological point of view. The genus Dipetalogaster Usinger, 1939 is composed only by the species Dipetalogaster maxima Uhler, 1894. This triatomine is exclusive of the Mexico and is a potential vector for Chagas disease. Besides the epidemiological importance, the insects of the Triatominae subfamily are important biological models for cytogenetic studies. Therefore, in order to contribute to the knowledge on the reproductive biology and assist in citotaxonomy of D. maxima, this study aimed to describe spermatogenesis, as well as confirm the karyotype and heterochromatic patterns of this Mexican triatomine species. The seminiferous tubules were torn, fixed to a cover slip and underwent the cytogenetic technique of Lacto-acetic orcein and C-banding. Through the cytogenetics analysis of testicular material D. maxima it was possible to confirm the karyotype (2n = 22), describe the stages of spermatogenesis and characterize the heterochromatic pattern (restricted to sex chromosome Y) of the species. D. maxima showed the same arrangement of heterochromatin described for Triatoma lecticularia (Stål, 1859) (a species that occur in United States of American and Mexico and is phylogenetically related with D. maxima), highlighting the importance of this analysis as an optimization tool to explore phylogenetic correlations.
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Affiliation(s)
- K C Borsatto
- Laboratório de Biologia Celular, Departamento de Biologia, Instituto de Biociências, Letras e Ciências Exatas - IBILCE, Universidade Estadual Paulista "Júlio de Mesquita Filho" - UNESP, Rua Cristóvão Colombo, 2265, Jardim Nazareth, CEP 15054-000, São José do Rio Preto, SP, Brasil
| | - K C C Alevi
- Laboratório de Parasitologia, Departamento de Ciências Biológicas, Faculdade de Ciências Farmacêuticas - FCFAR, Universidade Estadual Paulista "Júlio de Mesquita Filho" - UNESP, Rodovia Araraquara-Jaú, Km 1, CEP 14801-902, Araraquara, SP, Brasil
| | - J Oliveira
- Laboratório de Parasitologia, Departamento de Ciências Biológicas, Faculdade de Ciências Farmacêuticas - FCFAR, Universidade Estadual Paulista "Júlio de Mesquita Filho" - UNESP, Rodovia Araraquara-Jaú, Km 1, CEP 14801-902, Araraquara, SP, Brasil
| | - M T V Azeredo-Oliveira
- Laboratório de Biologia Celular, Departamento de Biologia, Instituto de Biociências, Letras e Ciências Exatas - IBILCE, Universidade Estadual Paulista "Júlio de Mesquita Filho" - UNESP, Rua Cristóvão Colombo, 2265, Jardim Nazareth, CEP 15054-000, São José do Rio Preto, SP, Brasil
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Monteiro FA, Weirauch C, Felix M, Lazoski C, Abad-Franch F. Evolution, Systematics, and Biogeography of the Triatominae, Vectors of Chagas Disease. ADVANCES IN PARASITOLOGY 2019. [PMID: 29530308 DOI: 10.1016/bs.apar.2017.12.002] [Citation(s) in RCA: 83] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
In this chapter, we review and update current knowledge about the evolution, systematics, and biogeography of the Triatominae (Hemiptera: Reduviidae)-true bugs that feed primarily on vertebrate blood. In the Americas, triatomines are the vectors of Trypanosoma cruzi, the etiological agent of Chagas disease. Despite declining incidence and prevalence, Chagas disease is still a major public health concern in Latin America. Triatomines occur also in the Old World, where vector-borne T. cruzi transmission has not been recorded. Triatomines evolved from predatory reduviid bugs, most likely in the New World, and diversified extensively across the Americas (including the Caribbean) and in parts of Asia and Oceania. Here, we first discuss our current understanding of how, how many times, and when the blood-feeding habit might have evolved among the Reduviidae. Then we present a summary of recent advances in the systematics of this diverse group of insects, with an emphasis on the contribution of molecular tools to the clarification of taxonomic controversies. Finally, and in the light of both up-to-date phylogenetic hypotheses and a thorough review of distribution records, we propose a global synthesis of the biogeography of the Triatominae. Over 130 triatomine species contribute to maintaining T. cruzi transmission among mammals (sometimes including humans) in almost every terrestrial ecoregion of the Americas. This means that Chagas disease will never be eradicated and underscores the fact that effective disease prevention will perforce require stronger, long-term vector control-surveillance systems.
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Affiliation(s)
- Fernando Araujo Monteiro
- Laboratório de Epidemiologia e Sistemática Molecular, Instituto Oswaldo Cruz, FIOCRUZ, Rio de Janeiro, Brazil.
| | | | - Márcio Felix
- Laboratório de Biodiversidade Entomológica, Instituto Oswaldo Cruz, FIOCRUZ, Rio de Janeiro, Brazil
| | - Cristiano Lazoski
- Instituto de Biologia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
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Oliveira MLRD, Camara DCP, Freitas SPC, Santos-Mallet JR. Spermatological Morphology of Triatoma Species (Hemiptera: Reduviidae: Triatominae). JOURNAL OF MEDICAL ENTOMOLOGY 2019; 56:959-966. [PMID: 30801646 DOI: 10.1093/jme/tjz017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Revised: 01/22/2019] [Accepted: 01/30/2019] [Indexed: 06/09/2023]
Abstract
Spermatozoa are among the most diverse cell types, and their morphologies often provide data that can be used to reliably evaluate phylogenetic relationships. They can also help to clarify the nature of 'specific complexes', which are common among triatomines. In the present study, we evaluated the copulation behavior of Triatoma rubrovaria Blanchard 1843 (Hemiptera: Reduviidae: Triatominae) and the structural morphology of sperm from T. carcavalloi Jurberg Rocha & Lent, 1998, T. infestans Klug, 1834, T. pintodiasi Jurberg Cunha & Rocha, 2013, and T. rubrovaria. Copulatory behavior was described from the moment males and females genitalia joined until they separated. Insemination was confirmed by the presence of a spermatophore in the female's bursa copulatrix. To measure their sperm, males were dissected and their seminal vesicles were removed, squashed on glass slides, and then spread, fixed, and observed under a photomicroscope. The images obtained were analyzed to measure the sperm. Seminal vesicles were also prepared for transmission electron microscopy. We performed K-means clustering separately for each species to group their sperm based on morphology. The differences in spermatozoa length among species of Triatominae, sperm types, and the interaction between species and sperm type were assessed with a two-way analysis of variance (ANOVA). The copulation time in T. rubrovaria was 3 to 5 min, which was sufficiently long for spermatophore transfer. All taxa showed polymorphic (short and long) sperm, with significant differences in the lengths of sperm among taxa. Using electron microscopy, the sperm cells of the four taxa examined were found to have similar ultrastructural morphology, confirming the hypothesized synapomorphies of sperm within the suborder Heteroptera (Hemiptera).
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Affiliation(s)
- Maria Luiza Ribeiro de Oliveira
- Laboratório Interdisciplinar de Vigilância Entomológica em Diptera e Hemiptera, Instituto Oswaldo Cruz, FIOCRUZ. Av. Brasil 4365. Pavilhão Carlos Chagas, 5º andar. Rio de Janeiro, RJ, Brasil
- Programa de Pós-graduação em Biologia Animal, Universidade Federal Rural do Estado do Rio de Janeiro. Rodovia BR 465, Km 07, s/n. Zona Rural. Seropédica, RJ, Brasil
| | - Daniel Cardoso Portela Camara
- Laboratório de Mosquitos Transmissores de Hematozoários, Instituto Oswaldo Cruz, FIOCRUZ, Av. Brasil, 4365, Pavilhão Carlos Chagas, 4º andar, Rio de Janeiro, RJ, Brasil
| | - Simone Patrícia Carneiro Freitas
- Laboratório Interdisciplinar de Vigilância Entomológica em Diptera e Hemiptera, Instituto Oswaldo Cruz, FIOCRUZ. Av. Brasil 4365. Pavilhão Carlos Chagas, 5º andar. Rio de Janeiro, RJ, Brasil
| | - Jacenir Reis Santos-Mallet
- Laboratório Interdisciplinar de Vigilância Entomológica em Diptera e Hemiptera, Instituto Oswaldo Cruz, FIOCRUZ. Av. Brasil 4365. Pavilhão Carlos Chagas, 5º andar. Rio de Janeiro, RJ, Brasil
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Salivary Gland Extract of Kissing Bug, Triatoma lecticularia, Reduces the Severity of Intestinal Inflammation through the Modulation of the Local IL-6/IL-10 Axis. Mediators Inflamm 2018; 2018:1924393. [PMID: 30140166 PMCID: PMC6081533 DOI: 10.1155/2018/1924393] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Accepted: 07/03/2018] [Indexed: 12/15/2022] Open
Abstract
Triatomines are known for their role as vectors of the causative agent of Chagas disease. The occurrence of an arsenal of molecules in their saliva is able to suppress vertebrate immune responses. Thus, it is reasonable to assume that the presence of molecules with therapeutic potential in their saliva is able to constrain inflammation in immune-mediated diseases. Thus, mice were exposed to dextran sulfate sodium (DSS) in drinking water uninterruptedly during 6 consecutive days and treated with T. lecticularia salivary gland extract (SGE) (3, 10, or 30 μg) or vehicle (saline) (n = 6/group). At the highest dose (30 μg), an improvement in clinical outcome and macroscopic aspects of the intestine were observed. This observation was followed by amelioration in histopathological aspects in the colon especially when the doses of 10 and 30 μg were used. Regardless of the concentration used, treatment with T. lecticularia SGE significantly reduced the levels of the inflammatory cytokine IL-6 in the intestine. The production of the anti-inflammatory cytokine IL-10 was positively impacted by the concentrations of 3 and 30 μg. Our results suggest that the presence of molecules in the T. lecticularia SGE is able to attenuate clinical outcome and colon shortening and improve intestinal architecture besides reducing the production of IL-6 and inducing a local production of IL-10 in the intestine.
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Pita S, Lorite P, Vela J, Mora P, Palomeque T, Thi KP, Panzera F. Holocentric chromosome evolution in kissing bugs (Hemiptera: Reduviidae: Triatominae): diversification of repeated sequences. Parasit Vectors 2017; 10:410. [PMID: 28874168 PMCID: PMC5586013 DOI: 10.1186/s13071-017-2349-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2017] [Accepted: 08/28/2017] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND The analysis of the chromosomal and genome evolution in organisms with holocentric chromosomes is restricted by the lack of primary constriction or centromere. An interesting group is the hemipteran subfamily Triatominae, vectors of Chagas disease, which affects around 6 to 7 million people worldwide. This group exhibits extensive variability in the number and chromosomal location of repeated sequences such as heterochromatin and ribosomal genes. This paper tries to reveal the significant differences of the repeated sequences among Triatoma species through the use of genomic DNA probes. METHODS We analysed the chromosomal distribution and evolution of repeated sequences in Triatoma species by genomic in situ hybridization (GISH) using genomic DNA probes from two North American Triatoma species. These genomic probes were hybridized both on their own chromosomes and on other Triatoma species from North and South America, with different amounts and chromosome location of C-heterochromatin. The results were compared with those previously described using South American Triatoma genomic probes. RESULTS We observed two chromosomal hybridization patterns: (i) very intense hybridization signals concentrated on specific chromosomal regions or particular chromosomes; and (ii) lower intensity hybridization signals dispersed along all chromosomes. Self-GISH on T. rubrofasciata and T. dimidiata chromosomes presented strong hybridization signals on all C-heterochromatin regions. However, when we perform genomic cross-hybridizations, only strong signals are detected on the Y chromosome, leaving the C-heterochromatic autosomal regions unmarked. CONCLUSIONS We confirm that repeated DNA of the Y chromosome is shared among Triatoma species and probably represents an ancestral character of the Triatomini tribe. On the contrary, autosomal heterochromatic regions are constituted by species-specific DNA repeats, most probably satDNA families, suggesting that Triatoma speciation involved the amplification of diverse types of autosomal repeats. Molecular characterization of principal repetitive DNAs seems to be an appropriate approach to infer evolutionary relationships in triatomines.
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Affiliation(s)
- Sebastián Pita
- Sección Genética Evolutiva, Facultad de Ciencias, Universidad de la República, Calle Iguá 4225, 11400 Montevideo, Uruguay
| | - Pedro Lorite
- Departamento de Biología Experimental, Área de Genética, Universidad de Jaén, Paraje Lagunillas s/n, 23071 Jaén, Spain
| | - Jesús Vela
- Departamento de Biología Experimental, Área de Genética, Universidad de Jaén, Paraje Lagunillas s/n, 23071 Jaén, Spain
| | - Pablo Mora
- Departamento de Biología Experimental, Área de Genética, Universidad de Jaén, Paraje Lagunillas s/n, 23071 Jaén, Spain
| | - Teresa Palomeque
- Departamento de Biología Experimental, Área de Genética, Universidad de Jaén, Paraje Lagunillas s/n, 23071 Jaén, Spain
| | - Khoa Pham Thi
- Center for Molecular Biology, IRD, Duytan University, Danang, Vietnam
| | - Francisco Panzera
- Sección Genética Evolutiva, Facultad de Ciencias, Universidad de la República, Calle Iguá 4225, 11400 Montevideo, Uruguay
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Nattero J, Piccinali RV, Macedo Lopes C, Hernández ML, Abrahan L, Lobbia PA, Rodríguez CS, Carbajal de la Fuente AL. Morphometric variability among the species of the Sordida subcomplex (Hemiptera: Reduviidae: Triatominae): evidence for differentiation across the distribution range of Triatoma sordida. Parasit Vectors 2017; 10:412. [PMID: 28877741 PMCID: PMC5585980 DOI: 10.1186/s13071-017-2350-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Accepted: 08/29/2017] [Indexed: 11/21/2022] Open
Abstract
BACKGROUND The Sordida subcomplex (Triatominae) comprises four species, Triatoma garciabesi, T. guasayana, T. patagonica and T. sordida, which differ in epidemiological importance and adaptations to human environments. Some morphological similarities among species make taxonomic identification, population differentiation and species delimitation controversial. Triatoma garciabesi and T. sordida are the most similar species, having been considered alternatively two and a single species until T. garciabesi was re-validated, mostly based on the morphology of male genitalia. More recently, T. sordida from Argentina has been proposed as a new cryptic species distinguishable from T. sordida from Brazil, Bolivia and Paraguay by cytogenetics. We studied linear and geometric morphometry of the head, wings and pronotum in populations of these species aiming to find phenotypic markers for their discrimination, especially between T. sordida and T. garciabesi, and if any set of variables that validates T. sordida from Argentina as a new species. RESULTS Head width and pronotum length were the linear variables that best differentiated species. Geometric morphometry revealed significant Mahalanobis distances in wing shape between all pairwise comparisons. Triatoma patagonica exhibited the best discrimination and T. garciabesi overlapped the distribution of the other species in the morphometric space of the first two DFA axes. Head shape showed differentiation between all pairs of species except for T. garciabesi and T. sordida. Pronotum shape did not differentiate T. garciabesi from T. guasayana. The comparison between T. garciabesi and T. sordida from Argentina and T. sordida from Brazil and Bolivia revealed low differentiation based on head and pronotum linear measurements. Pronotum and wing shape were different between T. garciabesi and T. sordida from Brazil and Bolivia and T. sordida from Argentina. Head shape did not differentiate T. garciabesi from T. sordida from Argentina. CONCLUSIONS Wing shape best delimited the four species phenotypically. The proposed cryptic species, T. sordida from Argentina, differed from T. sordida from Brazil and Bolivia in all measured shape traits, suggesting that the putative new species may not be cryptic. Additional studies integrating cytogenetic, phenotypic and molecular markers, as well as cross-breeding experiments are needed to confirm if these three entities represent true biological species.
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Affiliation(s)
- Julieta Nattero
- Facultad de Ciencias Exactas y Naturales, Departamento de Ecología, Genética y Evolución/Laboratorio de Eco-Epidemiología, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Buenos Aires, Argentina
- CONICET - Universidad de Buenos Aires, Instituto de Ecología, Genética y Evolución de Buenos Aires (IEGEBA), Ciudad Autónoma de Buenos Aires, Buenos Aires, Argentina
| | - Romina Valeria Piccinali
- Facultad de Ciencias Exactas y Naturales, Departamento de Ecología, Genética y Evolución/Laboratorio de Eco-Epidemiología, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Buenos Aires, Argentina
- CONICET - Universidad de Buenos Aires, Instituto de Ecología, Genética y Evolución de Buenos Aires (IEGEBA), Ciudad Autónoma de Buenos Aires, Buenos Aires, Argentina
| | - Catarina Macedo Lopes
- Laboratório Interdisciplinar de Vigilância Entomológica em Diptera e Hemiptera- Instituto Oswaldo Cruz, Avenida Brasil, 4365, Manguinhos, Rio de Janeiro, 21040-900 Brazil
| | - María Laura Hernández
- Centro Regional de Investigaciones Científicas y de Transferencia Tecnológica de La Rioja (CRILAR-CONICET), Entre Ríos y Mendoza s/n, 5301 La Rioja, Argentina
| | - Luciana Abrahan
- Centro Regional de Investigaciones Científicas y de Transferencia Tecnológica de La Rioja (CRILAR-CONICET), Entre Ríos y Mendoza s/n, 5301 La Rioja, Argentina
| | - Patricia Alejandra Lobbia
- Centro de Referencia de Vectores, Ministerio de Salud de la Nación, Hospital Colonia, Pabellón Rawson calle s/n, X5164 Santa María de Punilla, Córdoba Argentina
| | - Claudia Susana Rodríguez
- Intituto de Investigaciones Biológicas y Tecnológicas, CONICET, FCEFyN, UNC, Avenida Vélez Sarsfield 299, X5000JJC Córdoba, Argentina
| | - Ana Laura Carbajal de la Fuente
- Facultad de Ciencias Exactas y Naturales, Departamento de Ecología, Genética y Evolución/Laboratorio de Eco-Epidemiología, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Buenos Aires, Argentina
- CONICET - Universidad de Buenos Aires, Instituto de Ecología, Genética y Evolución de Buenos Aires (IEGEBA), Ciudad Autónoma de Buenos Aires, Buenos Aires, Argentina
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MALDI-TOF MS protein profiling for the rapid identification of Chagas disease triatomine vectors and application to the triatomine fauna of French Guiana. Parasitology 2017; 145:665-675. [PMID: 28768559 DOI: 10.1017/s0031182017001342] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Triatomines are haematophagous insects involved in the transmission of Trypanosoma cruzi, the aetiological agent of Chagas disease. The vector competence of these arthropods can be highly variable, depending on the species. A precise identification is therefore crucial for the epidemiological surveillance of T. cruzi and the determination of at-risk human populations. To circumvent the difficulties of morphological identification and the lack of comprehensiveness of the GenBank database, we hereby propose an alternative method for triatomine identification. The femurs of the median legs of triatomines from eight different species from French Guiana were subjected to matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) analysis. Method evaluation was performed on fresh specimens and was applied to dry specimens collected between 1991 and 2003. Femur-derived protein extracts provided reproducible spectra within the same species along with significant interspecies heterogeneity. Validation of the study by blind test analysis provided 100% correct identification of the specimens in terms of the species, sex and developmental stage. MALDI-TOF mass spectrometry appears to be a powerful tool for triatomine identification, which is a major step forward in the fight against Chagas disease.
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Alevi KCC, de Oliveira J, de Azeredo-Oliveira MTV, da Rosa JA. Triatoma vitticeps subcomplex (Hemiptera, Reduviidae, Triatominae): a new grouping of Chagas disease vectors from South America. Parasit Vectors 2017; 10:180. [PMID: 28407782 PMCID: PMC5390391 DOI: 10.1186/s13071-017-2129-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2016] [Accepted: 04/04/2017] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Triatomines have been grouped into complexes and subcomplexes based largely on morphological and geographical distribution. Although these groupings are not formally recognised as taxonomic ranks, they are likely monophyletic. However, recent studies have demonstrated that some subcomplexes from South America did not form monophyletic groups, and reorganisations have been suggested. One suggested reorganisation is to exclude Triatoma vitticeps, T. melanocephala, and T. tibiamaculata from the T. brasiliensis subcomplex. However, T. vitticeps and T. melanocephala exhibit several similar characteristics, including morphologic, cytogenetic, and phylogenetic features, a factor which supports the creation of a new subcomplex. Thus, this study aimed to describe the T. vitticeps subcomplex. RESULTS T. vitticeps and T. melanocephala are sister species and share a phylogenetic relationship, several similar morphological characteristics, the same composition of constitutive heterochromatin (Xs CG-rich and Y AT-rich), the same karyotype (2n = 20A + X1X2X3Y), and the same meiotic behaviour during spermatogenesis. Based on karyosystematics, for example, the T. vitticeps subcomplex may differ from all of the other subcomplexes from South America, as well as from the Rhodniini tribe and the genus Panstrongylus. We argue that the case of agmatoploidy involving the X chromosome was responsible for the karyotype divergence of this subcomplex in relation to the other South America subcomplexes. CONCLUSIONS Based on the phenotypic characteristics (morphology) and genotypes (cytogenetics and molecular features), we propose the creation of the monophyletic T. vitticeps subcomplex, which we believe is distinct from all other subcomplexes from South America.
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Affiliation(s)
- Kaio Cesar Chaboli Alevi
- Departamento de Biologia, Instituto de Biociências, Letras e Ciências Exatas, Universidade Estadual Paulista "Júlio de Mesquita Filho", Câmpus de São José do Rio Preto, Rua Cristovão Colombo 2265, 15054-000, São José do Rio Preto, SP, Brazil.
| | - Jader de Oliveira
- Departamento de Ciências Biológicas, Faculdade de Ciências Farmacêuticas, Universidade Estadual Paulista "Júlio de Mesquita Filho", Câmpus de Araraquara, Rod. Araraquara-Jaú km 1, 14801-902, Araraquara, SP, Brazil
| | - Maria Tercília Vilela de Azeredo-Oliveira
- Departamento de Biologia, Instituto de Biociências, Letras e Ciências Exatas, Universidade Estadual Paulista "Júlio de Mesquita Filho", Câmpus de São José do Rio Preto, Rua Cristovão Colombo 2265, 15054-000, São José do Rio Preto, SP, Brazil
| | - João Aristeu da Rosa
- Departamento de Ciências Biológicas, Faculdade de Ciências Farmacêuticas, Universidade Estadual Paulista "Júlio de Mesquita Filho", Câmpus de Araraquara, Rod. Araraquara-Jaú km 1, 14801-902, Araraquara, SP, Brazil
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Alevi KCC, Guerra AL, Imperador CHL, Jurberg J, Moreira FFF, Oliveira MTVDA. Mitochondrial Gene Confirms the Specific Status of Triatoma pintodiasi Jurberg, Cunha, and Rocha, 2013 (Hemiptera, Triatominae), an Endemic Species in Brazil. Am J Trop Med Hyg 2017; 96:200-201. [PMID: 27821685 PMCID: PMC5239693 DOI: 10.4269/ajtmh.16-0586] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Accepted: 08/29/2016] [Indexed: 11/07/2022] Open
Abstract
Chagas disease is most frequently transmitted to humans through contact with feces of insects from the Triatominae subfamily. In Brazil, there are 65 species of triatomines distributed throughout the country's 27 states. Among the species in the state of Rio Grande do Sul, Triatoma rubrovaria, Triatoma oliveirai, Triatoma pintodiasi, Triatoma klugi, Triatoma carcavalloi, and Triatoma circummaculata (with the addition Triatoma limai, which is endemic to Argentina) form the T. rubrovaria subcomplex. The last species described and grouped into this subcomplex was T. pintodiasi Thus, this study characterized the genetic distance between T. pintodiasi and of the other members of the T. rubrovaria subcomplex to evaluate the specific status of T. pintodiasi The genetic distance observed between T. pintodiasi and the other species of the T. rubrovaria subcomplex was large, a finding which highlights the specific status of the species considered to be cryptic of T. circummaculata.
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Affiliation(s)
- Kaio Cesar Chaboli Alevi
- Departamento de Biologia, Instituto de Biociências, Letras e Ciências Exatas, Universidade Estadual Paulista "Júlio de Mesquita Filho"-São José do Rio Preto, São Paulo, Brazil.
| | - Ana Letícia Guerra
- Departamento de Biologia, Instituto de Biociências, Letras e Ciências Exatas, Universidade Estadual Paulista "Júlio de Mesquita Filho"-São José do Rio Preto, São Paulo, Brazil
| | - Carlos Henrique Lima Imperador
- Departamento de Biologia, Instituto de Biociências, Letras e Ciências Exatas, Universidade Estadual Paulista "Júlio de Mesquita Filho"-São José do Rio Preto, São Paulo, Brazil
| | - José Jurberg
- Laboratório Nacional e Internacional de Referência em Taxonomia de Triatomíneos, Instituto Oswaldo Cruz, LNIRTT/IOC/FIOCRUZ, Rio de Janeiro, Brazil
| | - Felipe Ferraz Figueiredo Moreira
- Laboratório Nacional e Internacional de Referência em Taxonomia de Triatomíneos, Instituto Oswaldo Cruz, LNIRTT/IOC/FIOCRUZ, Rio de Janeiro, Brazil
| | - Maria Tercília Vilela de Azeredo Oliveira
- Departamento de Biologia, Instituto de Biociências, Letras e Ciências Exatas, Universidade Estadual Paulista "Júlio de Mesquita Filho"-São José do Rio Preto, São Paulo, Brazil
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Nattero J, Pita S, Calleros L, Crocco L, Panzera Y, Rodríguez CS, Panzera F. Morphological and Genetic Differentiation within the Southernmost Vector of Chagas Disease: Triatoma patagonica (Hemiptera - Reduviidae). PLoS One 2016; 11:e0168853. [PMID: 28005972 PMCID: PMC5179239 DOI: 10.1371/journal.pone.0168853] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Accepted: 12/07/2016] [Indexed: 11/18/2022] Open
Abstract
The epidemiological importance of Chagas disease vectors largely depends on their spreading ability and adaptation to domestic habitats. Triatoma patagonica is a secondary vector of Chagas disease endemic of Argentina, and it has been found colonizing domiciles and most commonly peridomiciliary structures in several Argentine provinces and morphological variation along its distribution range have been described. To asses if population differentiation represents geographic variants or true biological species, multiple genetic and phenotypic approaches and laboratory cross-breeding were performed in T. patagonica peridomestic populations. Analyses of chromatic variation of forewings, their size and the content of C-heterochromatin on chromosomes revealed that populations are structured following a North-South latitudinal variation. Cytochrome c oxidase I mitochondrial gene (COI) nucleotide analysis showed a mean genetic distance of 5.2% between the most distant populations. The cross-breeding experiments suggest a partial reproductive isolation between some populations with 40% of couples not laying eggs and low hatching efficiency. Our findings reveal phenotypic and genetic variations that suggest an incipient differentiation processes among T. patagonica populations with a pronounced phenotypic and genetic divergence between the most distant populations. The population differentiation here reported is probably related to differential environmental conditions and it could reflect the occurrence of an incipient speciation process in T. patagonica.
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Affiliation(s)
- Julieta Nattero
- Cátedra de Introducción a la Biología, Facultad de Ciencias Exactas Físicas y Naturales. Instituto de Investigaciones Biológicas y Tecnológicas -IIByT (CONICET—Universidad Nacional de Córdoba). Avda. Vélez Sarsfield, piso 2, Córdoba, Argentina
- Present address: Laboratorio de Eco-Epidemiología, Instituto de Ecología, Genética y Evolución de Buenos Aires, CONICET, EGE, FCEyN, UBA, Intendente Güiraldes 2160—Ciudad Universitaria—Pabellón 2, Buenos Aires, Argentina
- * E-mail: (JN); (FP)
| | - Sebastián Pita
- Sección Genética Evolutiva, Facultad de Ciencias, Universidad de la República. Iguá, Montevideo, Uruguay
| | - Lucía Calleros
- Sección Genética Evolutiva, Facultad de Ciencias, Universidad de la República. Iguá, Montevideo, Uruguay
| | - Liliana Crocco
- Cátedra de Introducción a la Biología, Facultad de Ciencias Exactas Físicas y Naturales. Instituto de Investigaciones Biológicas y Tecnológicas -IIByT (CONICET—Universidad Nacional de Córdoba). Avda. Vélez Sarsfield, piso 2, Córdoba, Argentina
| | - Yanina Panzera
- Sección Genética Evolutiva, Facultad de Ciencias, Universidad de la República. Iguá, Montevideo, Uruguay
| | - Claudia S. Rodríguez
- Cátedra de Introducción a la Biología, Facultad de Ciencias Exactas Físicas y Naturales. Instituto de Investigaciones Biológicas y Tecnológicas -IIByT (CONICET—Universidad Nacional de Córdoba). Avda. Vélez Sarsfield, piso 2, Córdoba, Argentina
| | - Francisco Panzera
- Sección Genética Evolutiva, Facultad de Ciencias, Universidad de la República. Iguá, Montevideo, Uruguay
- * E-mail: (JN); (FP)
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Bardella VB, Pita S, Vanzela ALL, Galvão C, Panzera F. Heterochromatin base pair composition and diversification in holocentric chromosomes of kissing bugs (Hemiptera, Reduviidae). Mem Inst Oswaldo Cruz 2016; 111:614-624. [PMID: 27759763 PMCID: PMC5066327 DOI: 10.1590/0074-02760160044] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Accepted: 07/19/2016] [Indexed: 11/22/2022] Open
Abstract
The subfamily Triatominae (Hemiptera, Reduviidae) includes 150 species of blood-sucking insects, vectors of Chagas disease or American trypanosomiasis. Karyotypic information reveals a striking stability in the number of autosomes. However, this group shows substantial variability in genome size, the amount and distribution of C-heterochromatin, and the chromosome positions of 45S rDNA clusters. Here, we analysed the karyotypes of 41 species from six different genera with C-fluorescence banding in order to evaluate the base-pair richness of heterochromatic regions. Our results show a high heterogeneity in the fluorescent staining of the heterochromatin in both autosomes and sex chromosomes, never reported before within an insect subfamily with holocentric chromosomes. This technique allows a clear discrimination of the heterochromatic regions classified as similar by C-banding, constituting a new chromosome marker with taxonomic and evolutionary significance. The diverse fluorescent patterns are likely due to the amplification of different repeated sequences, reflecting an unusual dynamic rearrangement in the genomes of this subfamily. Further, we discuss the evolution of these repeated sequences in both autosomes and sex chromosomes in species of Triatominae.
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Affiliation(s)
- Vanessa Bellini Bardella
- Universidade Estadual Paulista, Instituto de Biociências, Departamento
de Biologia, Rio Claro, SP, Brasil
| | - Sebastián Pita
- Universidad de la República, Facultad de Ciencias, Sección Genética
Evolutiva, Montevideo, Uruguay
| | - André Luis Laforga Vanzela
- Universidade Estadual de Londrina, Centro de Ciências Biológicas,
Departamento de Biologia Geral, Londrina, PR, Brasil
| | - Cleber Galvão
- Instituto Oswaldo Cruz, Laboratório Nacional e Internacional de
Referência em Taxonomia de Triatomíneos, Rio de Janeiro, RJ, Brasil
| | - Francisco Panzera
- Universidad de la República, Facultad de Ciencias, Sección Genética
Evolutiva, Montevideo, Uruguay
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