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de Sousa PS, de Oliveira J, Ravazi A, Dos Reis YV, de Azeredo Oliveira MTV, da Rosa JA, Galvão C, Alevi KCC. Analysis of the maternal inheritance hypothesis of the exochorium in eggs from hybrids of Chagas disease vectors. Sci Rep 2024; 14:722. [PMID: 38184729 PMCID: PMC10771436 DOI: 10.1038/s41598-023-51125-w] [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: 11/03/2023] [Accepted: 12/31/2023] [Indexed: 01/08/2024] Open
Abstract
Morphological studies applied to the taxonomy of the Triatominae cover various structures (head, wing, thorax, genitalia, and eggs). Exochorial structures of hybrid eggs were characterized and compared with the parents, demonstrating that hybrids presented characteristics identical to the exochorial pattern observed in the females of the crosses, which resulted in the hypothesis that the pattern of triatomine eggs is possibly a characteristic inherited from females. Thus, we characterized the exochorium of the eggs of several triatomine hybrids and compared them with the parents, to assess the pattern of segregation and test the hypothesis of maternal inheritance. Hybrids were obtained in at least one direction from all crosses. The analysis of the exochorium of the eggs of the hybrids showed different patterns of segregation: "exclusively paternal", "predominantly maternal", "predominantly paternal", "mutual", and "differential". Curiously, none of the hybrids evaluated presented characteristics that segregated exclusively from the female parental species. Thus, we demonstrate that the hypothesis of maternal inheritance of the exochorium pattern of eggs is not valid and we emphasize the importance of alternative/combined tools (such as integrative taxonomy) for the correct identification of these insect vectors (mainly in view of possible natural hybridization events due to climate and environmental changes).
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Affiliation(s)
- Paulo Sergio de Sousa
- Institute of Biosciences (IBB), Sao Paulo State University (Unesp), Dr. Antonio Celso Wagner Zanin, 250, Botucatu, SP, 18618-689, Brazil
| | - Jader de Oliveira
- Laboratory of Entomology in Public Health, Department of Epidemiology, Faculty of Public Health (FSP), University of Sao Paulo (USP), Avenue Dr. Arnaldo, 715, Sao Paulo, SP, 01246-904, Brazil
| | - Amanda Ravazi
- Institute of Biosciences (IBB), Sao Paulo State University (Unesp), Dr. Antonio Celso Wagner Zanin, 250, Botucatu, SP, 18618-689, Brazil
| | - Yago Visinho Dos Reis
- Laboratory of Parasitology, School of Pharmaceutical Sciences (FCFAR), Sao Paulo State University (Unesp), Road Araraquara/Jau, Km 01, Araraquara, SP, 14801-902, Brazil
| | - Maria Tercília Vilela de Azeredo Oliveira
- Laboratory of Cell Biology, Institute of Biosciences, Humanities and Exact Sciences (IBILCE), Sao Paulo State University (Unesp), Cristovao Colombo, 2265, Sao Jose do Rio Preto, SP, 15054-000, Brazil
| | - João Aristeu da Rosa
- Laboratory of Parasitology, School of Pharmaceutical Sciences (FCFAR), Sao Paulo State University (Unesp), Road Araraquara/Jau, Km 01, Araraquara, SP, 14801-902, Brazil
| | - Cleber Galvão
- National and International Reference Laboratory On Triatomine Taxonomy, Oswaldo Cruz Institute (IOC), Oswaldo Cruz Foundation (FIOCRUZ), Avenue Brasil, 4365, Rio de Janeiro, RJ, 21040-360, Brazil.
| | - Kaio Cesar Chaboli Alevi
- Laboratory of Entomology in Public Health, Department of Epidemiology, Faculty of Public Health (FSP), University of Sao Paulo (USP), Avenue Dr. Arnaldo, 715, Sao Paulo, SP, 01246-904, Brazil
- National and International Reference Laboratory On Triatomine Taxonomy, Oswaldo Cruz Institute (IOC), Oswaldo Cruz Foundation (FIOCRUZ), Avenue Brasil, 4365, Rio de Janeiro, RJ, 21040-360, Brazil
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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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Martínez-Ibarra JA, Nogueda-Torres B, Meraz-Medina T, Goicochea Del Rosal G. Crossing experiments detect partial reproductive isolation among populations of Triatoma longipennis (Hemiptera: Reduviidae: Triatominae). JOURNAL OF MEDICAL ENTOMOLOGY 2023; 60:998-1007. [PMID: 37459050 DOI: 10.1093/jme/tjad087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 05/30/2023] [Accepted: 06/22/2023] [Indexed: 09/13/2023]
Abstract
Chagas disease is an important vector-borne disease endemic in Mexico. Of the 33 triatomine species found in Mexico, Triatoma longipennis (Usinger) is considered among the most important because of its infection indices, capacity for transmitting Trypanosoma cruzi (Chagas), and its distribution areas. Here, we describe the results of a reproductive isolation analysis among 5 populations of T. longipennis collected from representative areas of Mexico. Fertility and segregation of morphological characteristics were examined in two generations of hybrids. The percentage of pairs with (fertile) offspring varied from 30% to 100% in the parental crosses, while these values varied from 0 to 100% in the intersite crosses. Our results indicate partial reproductive isolation among these populations. These findings shed light on the potential presence of a cryptic species complex of T. longipennis in Mexico.
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Affiliation(s)
- José Alejandro Martínez-Ibarra
- Laboratorio de Entomología Médica, Departamento de Ciencias de la Naturaleza, Centro Universitario del Sur, Universidad de Guadalajara, Av. Enrique Arreola Silva 883, 49000, Ciudad Guzmán, Jalisco, México
| | - Benjamín Nogueda-Torres
- Becario de COFAA, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Ciudad de México, México
| | - Tzintli Meraz-Medina
- Laboratorio de Entomología Médica, Departamento de Ciencias de la Naturaleza, Centro Universitario del Sur, Universidad de Guadalajara, Av. Enrique Arreola Silva 883, 49000, Ciudad Guzmán, Jalisco, México
- Departamento de Ciencias Básicas, Centro Universitario del Sur, Universidad de Guadalajara, Av. Enrique Arreola Silva 883, 49000, Ciudad Guzmán, Jalisco, México
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dos Reis YV, de Oliveira J, Madeira FF, Ravazi A, de Oliveira ABB, Bittinelli IDS, Delgado LMG, de Azeredo-Oliveira MTV, da Rosa JA, Galvão C, Alevi KCC. Karyotype Evolution in Triatominae (Hemiptera, Reduviidae): The Role of Chromosomal Rearrangements in the Diversification of Chagas Disease Vectors. Int J Mol Sci 2023; 24:ijms24076350. [PMID: 37047319 PMCID: PMC10094360 DOI: 10.3390/ijms24076350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 11/30/2022] [Accepted: 12/08/2022] [Indexed: 03/30/2023] Open
Abstract
Several cytogenetic studies have already been performed in Triatominae, such that different karyotypes could be characterized (ranging from 2n = 21 to 25 chromosomes), being the changes in the number of chromosomes related mainly to fusion and fission events. These changes have been associated with reproductive isolation and speciation events in other insect groups. Thus, we evaluated whether different karyotypes could act in the reproductive isolation of triatomines and we analyzed how the events of karyotypic evolution occurred along the diversification of these vectors. For this, experimental crosses were carried out between triatomine species with different karyotypes. Furthermore, based on a phylogeny with 88 triatomine taxa (developed with different molecular markers), a reconstruction of ancestral karyotypes and of anagenetic and cladogenetic events related to karyotypic alterations was performed through the ChromoSSE chromosomal evolution model. All crosses performed did not result in hybrids (prezygotic isolation in both directions). Our modeling results suggest that during Triatominae diversification, at least nine cladogenetic events may be associated with karyotype change. Thus, we emphasize that these alterations in the number of chromosomes can act as a prezygotic barrier in Triatominae (karyotypic isolation), being important evolutionary events during the diversification of the species of Chagas disease vectors.
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Affiliation(s)
- 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, Botucatu 18618-689, SP, Brazil
| | - Jader de Oliveira
- Laboratório de Entomologia em Saúde Pública, Faculdade de Saúde Pública, Universidade de São Paulo (USP), Av. Dr. Arnaldo 715, São Paulo 01246-904, SP, Brazil
| | - 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, São José do Rio Preto 15054-000, SP, Brazil
| | - 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, Botucatu 18618-689, SP, Brazil
| | - 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, São José do Rio Preto 15054-000, SP, Brazil
| | - Isadora da Silva 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, Botucatu 18618-689, SP, Brazil
| | - 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, Botucatu 18618-689, SP, Brazil
| | - 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, São José do Rio Preto 15054-000, SP, 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, Araraquara 14801-902, 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, Rio de Janeiro 21040-360, RJ, Brazil
- Correspondence:
| | - Kaio Cesar Chaboli Alevi
- Instituto de Biociências de Botucatu, Universidade Estadual Paulista “Júlio de Mesquita Filho” (UNESP), Rua Dr. Antônio Celso Wagner Zanin, 250, Distrito de Rubião Junior, Botucatu 18618-689, SP, Brazil
- Laboratório de Entomologia em Saúde Pública, Faculdade de Saúde Pública, Universidade de São Paulo (USP), Av. Dr. Arnaldo 715, São Paulo 01246-904, SP, 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, RJ, Brazil
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Pinotti H, Alevi KCC, de Oliveira J, Ravazi A, Madeira FF, Dos Reis YV, de Oliveira ABB, de Azeredo-Oliveira MTV, da Rosa JA. Segregation of phenotypic characteristics in hybrids of Triatoma brasiliensis species complex (Hemiptera, Reduviidae, Triatominae). INFECTION GENETICS AND EVOLUTION 2021; 91:104798. [PMID: 33676012 DOI: 10.1016/j.meegid.2021.104798] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 02/26/2021] [Accepted: 03/02/2021] [Indexed: 11/18/2022]
Abstract
There are currently 156 species, grouped into 18 genera and five tribes included in the subfamily Triatominae. All of them are potential vectors of Chagas disease. Triatoma is paraphyletic and the species of this genus have been grouped into complexes and subcomplexes. Triatoma brasiliensis complex is a monophyletic group composed of eight taxa: T. b. brasiliensis, T. b. macromelanosoma, T. juazeirensis, T. sherlocki, T. petrocchiae, T. lenti, T. bahiensis, T. melanica. Experimental crosses have helped in systematic, taxonomic and evolutionary issues of these vectors. Based on this, we carried out experimental crosses between T. lenti and four other species of the T. brasiliensis complex and analyzed the segregation pattern of phenotypic characteristics of T. lenti, T. b. brasiliensis, T. b. macromelasoma, T. juazeirensis and T. melanica in the hybrids. The hybrids resulting from the crosses between T. b. brasiliensis ♀ x T. lenti ♂, T. juazeirensis ♀ x T. lenti ♂, and T. melanica ♀ x T. lenti ♂ showed segregation of characteristics of both parental species. On the other hand, the hybrids between T. lenti ♀ x T. juazeirensis ♂, T. b. macromelasoma ♀ x T. lenti ♂, and T. lenti ♀ x T. melanica ♂ showed a specific pattern of T. lenti, T. lenti and T. melanica, respectively. Thus, the pattern of segregation of morphological characteristics between species of the T. brasiliensis complex was characterized. These results highlight the importance of integrative taxonomy for the correct identification of Chagas disease vectors grouped in the T. brasiliensis complex if natural hybridization events occur.
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Affiliation(s)
- Heloisa Pinotti
- Faculdade de Ciências Farmacêuticas, Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP), Rodovia Araraquara-Jaú km 1, Araraquara 14801-902, SP, Brazil
| | - Kaio Cesar Chaboli Alevi
- Faculdade de Ciências Farmacêuticas, Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP), Rodovia Araraquara-Jaú km 1, Araraquara 14801-902, SP, Brazil; 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, SP, Brazil.
| | - Jader de Oliveira
- Faculdade de Ciências Farmacêuticas, Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP), Rodovia Araraquara-Jaú km 1, Araraquara 14801-902, 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, Botucatu 18618-689, SP, Brazil
| | - Fernanda Fernandez Madeira
- Instituto de Biociências, Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP), Letras e Ciências Exatas, Rua Cristóvão Colombo 2265, São José do Rio Preto 15054-000, 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, Botucatu 18618-689, SP, Brazil
| | - Ana Beatriz Bortolozo de Oliveira
- Instituto de Biociências, Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP), Letras e Ciências Exatas, Rua Cristóvão Colombo 2265, São José do Rio Preto 15054-000, SP, Brazil
| | - Maria Tercília Vilela de Azeredo-Oliveira
- Instituto de Biociências, Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP), Letras e Ciências Exatas, Rua Cristóvão Colombo 2265, São José do Rio Preto 15054-000, SP, Brazil
| | - João Aristeu da Rosa
- Faculdade de Ciências Farmacêuticas, Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP), Rodovia Araraquara-Jaú km 1, Araraquara 14801-902, SP, 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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7
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Campos-Soto R, Díaz-Campusano G, Rives-Blanchard N, Cianferoni F, Torres-Pérez F. Biogeographic origin and phylogenetic relationships of Mepraia (Hemiptera, Reduviidae) on islands of northern Chile. PLoS One 2020; 15:e0234056. [PMID: 32525913 PMCID: PMC7289421 DOI: 10.1371/journal.pone.0234056] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Accepted: 05/17/2020] [Indexed: 12/21/2022] Open
Abstract
Chagas disease is one of the main zoonoses mediated by vectors in America. The etiological agent is the protozoan Trypanosoma cruzi, transmitted mainly by hematophagous insects of the subfamily Triatominae. Mepraia species are triatomines endemic to Chile that play an important role in T. cruzi transmission in the wild cycle and are potential vectors for humans. In addition to the continental distribution, populations of Mepraia genus have been reported inhabiting islands of northern Chile. The presence of individuals of Mepraia in insular areas might be explained through passive dispersion by marine birds or by vicariance of an ancestral widespread population. To clarify the biogeographic origin and phylogenetic relationships of island individuals of Mepraia, mitochondrial COI and cyt b genes were sequenced in individuals from island and continental areas. Gene sequences were used to estimate phylogenetic relationships, divergence dates and migration rates between insular and continental populations. The dates of divergence estimates are congruent with sea level and tectonic changes that originated the islands during Pleistocene. Migration rates suggest symmetric historical island-continent gene flow. We suggest that the origin of island triatomines can be explained by both vicariance and dispersion. Phylogenetic relationships show that individuals from Santa María Island and the continent clustered in a clade different from those previously reported, indicating a new lineage of Mepraia genus. This study will contribute to understand the origin of the T. cruzi infection in coastal islands of northern Chile.
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Affiliation(s)
- Ricardo Campos-Soto
- Instituto de Biología, Facultad de Ciencias, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
- * E-mail:
| | - Gabriel Díaz-Campusano
- Instituto de Biología, Facultad de Ciencias, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
| | - Ninette Rives-Blanchard
- Instituto de Biología, Facultad de Ciencias, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
| | - Franco Cianferoni
- Instituto de Biología, Facultad de Ciencias, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
| | - Fernando Torres-Pérez
- Instituto de Biología, Facultad de Ciencias, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
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8
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Villacís AG, Dujardin JP, Panzera F, Yumiseva CA, Pita S, Santillán-Guayasamín S, Orozco MI, Mosquera KD, Grijalva MJ. Chagas vectors Panstrongylus chinai (Del Ponte, 1929) and Panstrongylus howardi (Neiva, 1911): chromatic forms or true species? Parasit Vectors 2020; 13:226. [PMID: 32375868 PMCID: PMC7201598 DOI: 10.1186/s13071-020-04097-z] [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: 10/10/2019] [Accepted: 04/25/2020] [Indexed: 11/23/2022] Open
Abstract
Background Chagas disease is a parasitic infection transmitted by “kissing bugs” (Hemiptera: Reduviidae: Triatominae) that has a huge economic impact in Latin American countries. The vector species with the upmost epidemiological importance in Ecuador are Rhodnius ecuadoriensis (Lent & Leon, 1958) and Triatoma dimidiata (Latreille, 1811). However, other species such as Panstrongylus howardi (Neiva, 1911) and Panstrongylus chinai (Del Ponte, 1929) act as secondary vectors due to their growing adaptation to domestic structures and their ability to transmit the parasite to humans. The latter two taxa are distributed in two different regions, they are allopatric and differ mainly by their general color. Their relative morphological similarity led some authors to suspect that P. chinai is a melanic form of P. howardi. Methods The present study explored this question using different approaches: antennal phenotype; geometric morphometrics of heads, wings and eggs; cytogenetics; molecular genetics; experimental crosses; and ecological niche modeling. Results The antennal morphology, geometric morphometrics of head and wing shape and cytogenetic analysis were unable to show distinct differences between the two taxa. However, geometric morphometrics of the eggs, molecular genetics, ecological niche modeling and experimental crosses including chromosomal analyses of the F1 hybrids, in addition to their coloration and current distribution support the hypothesis that P. chinai and P. howardi are separate species. Conclusions Based on the evidence provided here, P. howardi and P. chinai should not be synonymized. They represent two valid, closely related species.![]()
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Affiliation(s)
- Anita G Villacís
- Center for Research on Health in Latin America (CISeAL), School of Biological Sciences, Pontificia Universidad Católica del Ecuador, Av. 12 de Octubre 1076 y Roca, Quito, Ecuador.,Infectious and Tropical Disease Institute, Department of Biomedical Sciences, Heritage College of Osteopathic Medicine, Ohio University, Athens, OH, 45701, USA
| | - Jean-Pierre Dujardin
- Center for Research on Health in Latin America (CISeAL), School of Biological Sciences, Pontificia Universidad Católica del Ecuador, Av. 12 de Octubre 1076 y Roca, Quito, Ecuador.,IRD, UMR 177 IRD-CIRAD INTERTRYP, Campus international de Baillarguet, Montpellier, France
| | - Francisco Panzera
- Sección Genética Evolutiva, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay
| | - César A Yumiseva
- Center for Research on Health in Latin America (CISeAL), School of Biological Sciences, Pontificia Universidad Católica del Ecuador, Av. 12 de Octubre 1076 y Roca, Quito, Ecuador
| | - Sebastián Pita
- Sección Genética Evolutiva, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay
| | - Soledad Santillán-Guayasamín
- Center for Research on Health in Latin America (CISeAL), School of Biological Sciences, Pontificia Universidad Católica del Ecuador, Av. 12 de Octubre 1076 y Roca, Quito, Ecuador
| | - Marco I Orozco
- Center for Research on Health in Latin America (CISeAL), School of Biological Sciences, Pontificia Universidad Católica del Ecuador, Av. 12 de Octubre 1076 y Roca, Quito, Ecuador
| | - Katherine D Mosquera
- Center for Research on Health in Latin America (CISeAL), School of Biological Sciences, Pontificia Universidad Católica del Ecuador, Av. 12 de Octubre 1076 y Roca, Quito, Ecuador.,Carrera de Ingeniería en Biotecnología, Departamento de Ciencias de la Vida y la Agricultura, Universidad de las Fuerzas Armadas - ESPE, Sangolquí, Ecuador
| | - Mario J Grijalva
- Infectious and Tropical Disease Institute, Department of Biomedical Sciences, Heritage College of Osteopathic Medicine, Ohio University, Athens, OH, 45701, USA.
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9
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Garrido R, Bacigalupo A, Peña-Gómez F, Bustamante RO, Cattan PE, Gorla DE, Botto-Mahan C. Potential impact of climate change on the geographical distribution of two wild vectors of Chagas disease in Chile: Mepraia spinolai and Mepraia gajardoi. Parasit Vectors 2019; 12:478. [PMID: 31610815 PMCID: PMC6792221 DOI: 10.1186/s13071-019-3744-9] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Accepted: 10/09/2019] [Indexed: 01/22/2023] Open
Abstract
Background Mepraia gajardoi and Mepraia spinolai are endemic triatomine vector species of Trypanosoma cruzi, a parasite that causes Chagas disease. These vectors inhabit arid, semiarid and Mediterranean areas of Chile. Mepraia gajardoi occurs from 18° to 25°S, and M. spinolai from 26° to 34°S. Even though both species are involved in T. cruzi transmission in the Pacific side of the Southern Cone of South America, no study has modelled their distributions at a regional scale. Therefore, the aim of this study is to estimate the potential geographical distribution of M. spinolai and M. gajardoi under current and future climate scenarios. Methods We used the Maxent algorithm to model the ecological niche of M. spinolai and M. gajardoi, estimating their potential distributions from current climate information and projecting their distributions to future climatic conditions under representative concentration pathways (RCP) 2.6, 4.5, 6.0 and 8.5 scenarios. Future predictions of suitability were constructed considering both higher and lower public health risk situations. Results The current potential distributions of both species were broader than their known ranges. For both species, climate change projections for 2070 in RCP 2.6, 4.5, 6.0 and 8.5 scenarios showed different results depending on the methodology used. The higher risk situation showed new suitable areas, but the lower risk situation modelled a net reduction in the future potential distribution areas of M. spinolai and M. gajardoi. Conclusions The suitable areas for both species may be greater than currently known, generating new challenges in terms of vector control and prevention. Under future climate conditions, these species could modify their potential geographical range. Preventive measures to avoid accidental human vectorial transmission by wild vectors of T. cruzi become critical considering the uncertainty of future suitable areas projected in this study.
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Affiliation(s)
- Rubén Garrido
- Departamento de Ciencias Ecológicas, Facultad de Ciencias, Universidad de Chile, Casilla 653, Santiago, Chile.,Departamento de Biología y Química, Facultad de Ciencias Básicas, Universidad Católica del Maule, Talca, Chile
| | - Antonella Bacigalupo
- Departamento de Ciencias Biológicas Animales, Facultad de Ciencias Veterinarias y Pecuarias, Universidad de Chile, Casilla 2, Correo 15, Santiago, Chile
| | - Francisco Peña-Gómez
- Departamento de Ciencias Ecológicas, Facultad de Ciencias, Universidad de Chile, Casilla 653, Santiago, Chile
| | - Ramiro O Bustamante
- Departamento de Ciencias Ecológicas, Facultad de Ciencias, Universidad de Chile, Casilla 653, Santiago, Chile
| | - Pedro E Cattan
- Departamento de Ciencias Biológicas Animales, Facultad de Ciencias Veterinarias y Pecuarias, Universidad de Chile, Casilla 2, Correo 15, Santiago, Chile
| | - David E Gorla
- Instituto de Diversidad y Ecología Animal, CONICET-Universidad Nacional de Córdoba, Córdoba, Argentina
| | - Carezza Botto-Mahan
- Departamento de Ciencias Ecológicas, Facultad de Ciencias, Universidad de Chile, Casilla 653, Santiago, Chile.
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10
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Frías-Lasserre D, González CR, Reyes C, Lecaros Alvarado A. The Interspecific Hemelytra Differences Among Mepraia Species Males (Hemiptera, Reduviidae:Triatominae) in Chile. JOURNAL OF MEDICAL ENTOMOLOGY 2018; 55:1478-1485. [PMID: 30365032 DOI: 10.1093/jme/tjy119] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Indexed: 06/08/2023]
Abstract
The species of the genus Mepraia Mazza, Gajardo Tobar and Jörg (Hemiptera, Reduviidae:Triatominae) exhibit polymorphism in their hemelytra. The females of all species are always micropterous, but the males can be micropterous, brachypterous, or macropterous. Mepraia gajardoi Frías, Henry and González (Hemiptera: Reduviidae) males are always brachypterous, Mepraia parapatrica Frías-Lasserre (Hemiptera: Reduviidae) males are macropterous or brachypterous and Mepraia spinolai (Porter) (Hemiptera: Reduviidae) males are macropterous, brachypterous, or micropterous. Here, we determined distinctive characteristics of the hemelytra of the males of these three species and found that the length of the hemelytra of the brachypterous males in these three species differs statistically, as does their shape and morphology. These differences are particularly apparent at the apex of the hemelytra, the anterior part of the corium, in the morphology and number of the ctenidia of coaptors, and presence or absence of the cross vein of the hemelytra. Based on this, we propose a key based on hemelytra characteristics to identify the males of the three Mepraia species.
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Affiliation(s)
- Daniel Frías-Lasserre
- Instituto de Entomología, Facultad de Ciencias Básicas, Universidad Metropolitana de Ciencias de la Educación, Santiago, Chile
| | - Christian R González
- Instituto de Entomología, Facultad de Ciencias Básicas, Universidad Metropolitana de Ciencias de la Educación, Santiago, Chile
- Laboratorio de Entomología Médica, Sección Parasitología, Instituto de Salud Pública de Chile, Santiago, Chile
| | - Carolina Reyes
- Laboratorio de Entomología Médica, Sección Parasitología, Instituto de Salud Pública de Chile, Santiago, Chile
| | - Alberto Lecaros Alvarado
- Unidad de Innovación Curricular, Universidad Tecnológica Metropolitana de Chile, Santiago, Chile
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11
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Chaboli Alevi KC, Pinotti H, Freitas de Araújo R, Vilela de Azeredo Oliveira MT, Aristeu da Rosa J, Mendonça VJ. Hybrid Collapse Confirms the Specific Status of Triatoma bahiensis Sherlock and Serafim, 1967 (Hemiptera, Triatominae), an Endemic Species in Brazil. Am J Trop Med Hyg 2017; 98:475-477. [PMID: 29260653 DOI: 10.4269/ajtmh.17-0270] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
Six to seven million people worldwide are estimated to be infected with Trypanosoma cruzi, the etiologic agent of Chagas disease transmitted mainly by triatomines. Triatoma bahiensis was recently collected in the Brazilian state of Bahia and revalidated using different approaches. The main criterion used to define a "good" biological species is reproductive isolation, so we evaluated the cytogenetics of first-generation (F1) hybrids resulting from the experimental cross between T. bahiensis females and Triatoma lenti males to possibly characterize the postzygotic isolation associated with the hybrid breakdown. All cells analyzed presented a karyotype of 2n = 22 and a pair of univalent autosomes. This chromosome behavior represents hybrid collapse and underscores the specific status of T. bahiensis. Thus, we have characterized the presence of the hybrid collapse phenomenon in an experimental cross, and we confirm the specific status of T. bahiensis, thus contributing to the Triatominae taxonomy.
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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" - IBILCE/UNESP, São José do Rio Preto, São Paulo, Brazil
| | - Heloisa Pinotti
- Departamento de Ciências Biológicas, Faculdade de Ciências Farmacêuticas, Universidade Estadual Paulista "Júlio de Mesquita Filho", FCFAR/UNESP, Araraquara, São Paulo, Brazil
| | - Renato Freitas de Araújo
- Secretaria Estadual de Saúde da Bahia - SESAB/Divisão de Entomologia, Centro Administrativo da Bahia, Salvador, Bahia, Brazil
| | - Maria Tercília Vilela de Azeredo Oliveira
- 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
| | - João Aristeu da Rosa
- Departamento de Ciências Biológicas, Faculdade de Ciências Farmacêuticas, Universidade Estadual Paulista "Júlio de Mesquita Filho", FCFAR/UNESP, Araraquara, São Paulo, Brazil
| | - Vagner José Mendonça
- Departamento de Parasitologia e Microbiologia, Centro de Ciências da Saúde, Universidade Federal do Piauí, UFPI, Campus Ministro Petrônio Portella, Teresina, Piauí, Brazil
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12
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Frías-Lasserre D, González CR, Valenzuela CR, de Carvalho DB, Oliveira J, Canals M, da Rosa JA. Wing Polymorphism and Trypanosoma cruzi Infection in Wild, Peridomestic, and Domestic Collections of Mepraia spinolai (Hemiptera: Reduviidae) From Chile. JOURNAL OF MEDICAL ENTOMOLOGY 2017; 54:1061-1066. [PMID: 28399301 DOI: 10.1093/jme/tjx061] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Indexed: 06/07/2023]
Abstract
Mepraia spinolai (Porter) is a vector of Trypanosoma cruzi that causes Chagas disease. Females are always wingless, but males may be winged or wingless. We determined by PCR the infection percentage with T. cruzi of M. spinolai adults and nymphs in domestic, peridomestic, and wild collections, in different regions of Chile. In all regions, winged males were more abundant than females and wingless males. Winged males collected inside houses were less parasitized than were those from peridomestic and wild environments. Although winged males of M. spinolai have comparatively low levels of infection, this segment may still represent the greatest vector threat in this species for transmission of T. cruzi to humans and other vertebrates in domestic, wild, and peridomestic habitats. Winged males represent the dispersive form of this species that invades human dwellings. Feeding deprivation resulting from the time required to find a food source and to search for reproductive females could explain the lower infection rates (negatives) of winged males collected from inside houses in comparison with winged males collected from peridomestic and wild habitats.
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Affiliation(s)
- Daniel Frías-Lasserre
- Instituto de Entomología, Universidad Metropolitana de Ciencias de la Educación, Av, José Pedro Alessandri 774, Santiago, Chile 7760197
| | - Christian R González
- Instituto de Entomología, Universidad Metropolitana de Ciencias de la Educación, Av, José Pedro Alessandri 774, Santiago, Chile 7760197
- Laboratorio Entomología, Sección Parasitología, Instituto de Salud Pública de Chile
| | | | - Danila Blanco de Carvalho
- Departamento de Ciências Biologicas, Faculdade de Ciências Farmacêuticas, Universidade Estadual Paulista, Rodovia Araraquara- Jaú km 1, 14 801-902, Araraquara, SP, Brasil
| | - Jader Oliveira
- Departamento de Ciências Biologicas, Faculdade de Ciências Farmacêuticas, Universidade Estadual Paulista, Rodovia Araraquara- Jaú km 1, 14 801-902, Araraquara, SP, Brasil
| | - Mauricio Canals
- Programa de Salud Ambiental, Escuela de Salud Pública, Facultad de Medicina, Universidad de Chile; Departamento de Medicina, Facultad de Medicina, Universidad de Chile. Independencia 939, Santiago, Zip code 8380453
- Departamento de Medicina, Facultad de Medicina, Universidad de Chile
| | - Joao Aristeu da Rosa
- Departamento de Ciências Biologicas, Faculdade de Ciências Farmacêuticas, Universidade Estadual Paulista, Rodovia Araraquara- Jaú km 1, 14 801-902, Araraquara, SP, Brasil
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13
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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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