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Seabra AP, Oliveira-Correia JPS, Galvão C. Comparative morphology of eggs of Rhodnius domesticus Neiva & Pinto, Rhodnius neglectus Lent and Rhodnius prolixus Stål (Hemiptera: Reduviidae: Triatominae). Parasitol Int 2024; 101:102894. [PMID: 38604471 DOI: 10.1016/j.parint.2024.102894] [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: 02/01/2024] [Revised: 04/05/2024] [Accepted: 04/08/2024] [Indexed: 04/13/2024]
Abstract
Rhodnius species are potential vectors of the etiological agent of Chagas disease (CD), the protozoan Trypanosoma cruzi. CD impacts around seven million people in Latin America, resulting in approximately fourteen thousand deaths per year. Several species of Rhodnius are notable not only for their epidemiological relevance, but also for the challenging distinction between their species. Rhodnius has twenty species, each with its specific epidemiological importance. Rhodnius neglectus and Rhodnius prolixus are found with colonies in domiciliary environments. The observation of eggs in human dwellings signals the colonization process of these insects, increasing the risk of contamination of the population, since correct identification of eggs is necessary to help more effective vector control programs. Here we highlight diagnostic characters of eggs for these three species.
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Affiliation(s)
- Allan Pitta Seabra
- Laboratório Nacional e Internacional de Referência em Taxonomia de Triatomíneos, Instituto Oswaldo Cruz, Fiocruz, Av. Brasil 4365, Rio de Janeiro 21040-900, Brazil.
| | - João Paulo Sales Oliveira-Correia
- Laboratório Nacional e Internacional de Referência em Taxonomia de Triatomíneos, Instituto Oswaldo Cruz, Fiocruz, Av. Brasil 4365, Rio de Janeiro 21040-900, Brazil.
| | - Cleber Galvão
- Laboratório Nacional e Internacional de Referência em Taxonomia de Triatomíneos, Instituto Oswaldo Cruz, Fiocruz, Av. Brasil 4365, Rio de Janeiro 21040-900, Brazil.
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Gomes DS, Oliveira CJF, Costa TMC, Rueda AP, Zanuncio JC, Serrão JE, Souza EA. Histology and histochemistry of the accessory gland of the female reproductive tract of Rhodnius neglectus Lent, 1954 (Hemiptera: Reduviidae). BRAZ J BIOL 2023; 83:e271913. [PMID: 37194827 DOI: 10.1590/1519-6984.271913] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Accepted: 04/10/2023] [Indexed: 05/18/2023] Open
Abstract
Rhodnius neglectus is a wild triatomine, vector of the protozoan Trypanosoma cruzi, which causes Chagas' disease, and feeds on the blood of small mammals, being essential for its growth and reproduction. Accessory glands of the female reproductive tract are important in insect reproduction, but their anatomy and histology in R. neglectus are poorly studied. The aim of this work was to describe the histology and histochemistry of the accessory gland of the female reproductive tract of R. neglectus. The reproductive tract of five females of R. neglectus was dissected and the accessory glands transferred to Zamboni's fixative solution, dehydrated in a crescent series of ethanol, embedded in historesin, sectioned at 2 µm thick, stained with toluidine blue for histological analysis or mercury bromophenol blue for detection of total proteins. The accessory gland R. neglectus is tubular, without branches, opening in the dorsal region of the vagina and differing along its length in proximal and distal regions. In the proximal region, the gland is lined by the cuticle with a layer of columnar cells associated with muscle fibers. In the distal region of the gland, the epithelium has spherical secretory cells with terminal apparatus and conducting canaliculi opening in the lumen through pores in the cuticle. Proteins were identified in the gland lumen, terminal apparatus, nucleus and cytoplasm of secretory cells. The histology of the R. neglectus gland is similar to that found in other species of this genus, but with variations in the shape and size of its distal region.
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Affiliation(s)
- D S Gomes
- Universidade Federal de Viçosa - UFV, Departamento de Biologia Geral/BIOAGRO, Viçosa, MG, Brasil
| | - C J F Oliveira
- Universidade Federal do Triangulo Mineiro - UFTM, Instituto de Ciências Biológicas e Naturais, Uberaba, MG, Brasil
| | - T M C Costa
- Universidade Federal do Triangulo Mineiro - UFTM, Instituto de Ciências Biológicas e Naturais, Uberaba, MG, Brasil
| | - A Plata Rueda
- Universidad Nacional de Colombia - UNAL, Bogotá, Colombia
| | - J C Zanuncio
- Universidade Federal de Viçosa - UFV, Departamento de Entomologia/BIOAGRO, Viçosa, MG, Brasil
| | - J E Serrão
- Universidade Federal de Viçosa - UFV, Departamento de Biologia Geral/BIOAGRO, Viçosa, MG, Brasil
| | - E A Souza
- Universidade Federal de Viçosa - UFV, Instituto de Ciências Biológicas e da Saúde, Rio Paranaíba, MG, Brasil
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de Oliveira J, Aristeu da Rosa J, Chaboli Alevi KC. Chagas Disease Vectors of Espírito Santo, Brazil: First Report of Triatoma infestans (Klug, 1834) (Hemiptera, Triatominae) in the Brazilian State and Development of an Identification Key Based on Cytogenetic Data. Am J Trop Med Hyg 2021; 104:653-655. [PMID: 33399039 DOI: 10.4269/ajtmh.20-0492] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2020] [Accepted: 08/21/2020] [Indexed: 11/07/2022] Open
Abstract
Chagas disease is a potentially life-threatening illness caused by the protozoan Trypanosoma cruzi and transmitted, mainly, by hematophagous insects of the Triatominae subfamily. In Brazil, there are currently about 66 triatomine species distributed throughout the country's 27 states. Triatoma infestans is considered as a species of great vectorial importance, mainly because of its biological characteristics, such as the high degree of anthropophilia, adaptation to the home environment, ability to withstand long periods of fasting, and present a wide geographical distribution. Taking into account the epidemiological importance of these species, we carried out the first report of T. infestans in the Espírito Santo, Brazil, and development of an identification key for all species notified in that state, based on cytogenetic data. This information is important because they contribute to the direction of epidemiological surveillance activities carried out by vector control programs of the Espírito Santo, Brazil.
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Affiliation(s)
- Jader de Oliveira
- Departamento de Ciências Biológicas, Faculdade de Ciências Farmacêuticas, Laboratório de Parasitologia, Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP), Araraquara, Brazil
| | - João Aristeu da Rosa
- Departamento de Ciências Biológicas, Faculdade de Ciências Farmacêuticas, Laboratório de Parasitologia, Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP), Araraquara, Brazil
| | - Kaio Cesar Chaboli Alevi
- Departamento de Ciências Biológicas, Faculdade de Ciências Farmacêuticas, Laboratório de Parasitologia, Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP), Araraquara, Brazil
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Falcone R, Ribeiro AR, Oliveira JD, Mendonça VJ, Graminha M, Rosa JAD. Differentiation of Rhodnius neglectus and Rhodnius prolixus (Hemiptera: Reduviidae: Triatominae) by multiple parameters. Rev Soc Bras Med Trop 2020; 53:e20190503. [PMID: 32267457 PMCID: PMC7156257 DOI: 10.1590/0037-8682-0503-2019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Accepted: 02/17/2020] [Indexed: 11/26/2022] Open
Abstract
Introduction: The genus Rhodnius in the subfamily Triatominae comprises
20 species, which can transmit Trypanosoma cruzi and
Trypanosoma rangeli. Due to the development of
molecular techniques, Triatominae species can now be characterized by
mitochondrial and nuclear markers, making it possible to verify and/or
correct the existing data on these species. The results achieved in this
study provide a more detailed and accurate differentiation of the
Rhodnius species, helping the establishment of a more
appropriate classification. Methods: Data collection was performed by DNA analysis, morphological and
morphometric studies to distinguish four populations of R.
neglectus and four of R. prolixus.
Phylogenetic data were compared to morphological and morphometric data. Results: The analysis of Cytb fragments suggests that the four colonies designated to
Rhodnius neglectus as well as those of R.
prolixus were correctly identified. Conclusions: The morphological characters observed in the specimens of the colonies
originally identified as R. prolixus and R.
neglectus, such as the presence or absence of collar in the
eggs, the patterns of the median process of the pygophore, and anterolateral
angle, are consistent with the species. Geometric morphometrics also show an
intraspecific variability in R. prolixus.
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Affiliation(s)
- Rossana Falcone
- Departamento de Ciências Biológicas, Universidade Estadual Paulista, Araraquara, SP, Brasil
| | - Aline Rimoldi Ribeiro
- Departamento de Biologia Animal, Universidade Estadual de Campinas, Campinas, SP, Brasil
| | - Jader de Oliveira
- Departamento de Ciências Biológicas, Universidade Estadual Paulista, Araraquara, SP, Brasil
| | - Vagner José Mendonça
- Departamento de Parasitologia e Microbiologia, Universidade Federal do Piauí, Teresina, PI, Brasil
| | - Márcia Graminha
- Departamento de Análises Clínicas, Universidade Estadual Paulista, Araraquara, SP, Brasil
| | - João Aristeu da Rosa
- Departamento de Ciências Biológicas, Universidade Estadual Paulista, Araraquara, SP, Brasil
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Oliveira ASD, Ribeiro MAL, Castro GVDS, Brilhante NA, Camargo LMA, Meneguetti DUDO. Confirmation of the occurrence of Panstrongylus rufotuberculatus (Champion, 1899) in the state of Acre, Western Amazon. Rev Soc Bras Med Trop 2019; 52:e20180388. [PMID: 30994806 DOI: 10.1590/0037-8682-0388-2018] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Accepted: 11/29/2018] [Indexed: 11/21/2022] Open
Abstract
INTRODUCTION This study aimed to confirm the occurrence of Panstrongylus rufotuberculatus in the state of Acre, Brazil. METHODS The four specimens of P. rufotuberculatus were obtained from the entomological collection of the Zoobotanical Park of the Federal University of Acre (UFAC). RESULTS Confirmation of the occurrence of this species in the state of Acre increases the number of species already registered, from nine to ten. CONCLUSIONS The necessity to develop further studies was verified, especially with the domiciliary process of P. rufotuberculatus, resulting in tracing prophylactic measures against the vector transmission of Trypanosoma cruzi.
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Affiliation(s)
- Ailse Silva de Oliveira
- Programa de Pós-Graduação Stricto Sensu em Ciência da Saúde na Amazônia Ocidental, Universidade Federal do Acre, Rio Branco, AC, Brasil
| | - Mariane Albuquerque Lima Ribeiro
- Programa de Pós-Graduação Stricto Sensu em Ciência da Saúde na Amazônia Ocidental, Universidade Federal do Acre, Rio Branco, AC, Brasil.,Centro de Ciências da Saúde e do Desporto, Universidade Federal do Acre, Rio Branco, AC, Brasil
| | - Gabriela Vieira de Souza Castro
- Programa de Pós-Graduação Stricto Sensu em Ciência da Saúde na Amazônia Ocidental, Universidade Federal do Acre, Rio Branco, AC, Brasil.,Centro de Ciências da Saúde e do Desporto, Universidade Federal do Acre, Rio Branco, AC, Brasil
| | | | - Luís Marcelo Aranha Camargo
- Programa de Pós-Graduação Stricto Sensu em Ciência da Saúde na Amazônia Ocidental, Universidade Federal do Acre, Rio Branco, AC, Brasil.,Instituto de Ciências Biomédicas-5, Universidade de São Paulo, Monte Negro, RO, Brasil.,Departamento de Medicina, Faculdade São Lucas, Porto Velho, Rondônia, Brasil.,Centro de Pesquisas em Medicina Tropical, Porto Velho, RO, Brasil.,Instituto Nacional de Ciência e Tecnologia EpiAmo/Rondônia, Porto Velho, RO, Brasil
| | - Dionatas Ulises de Oliveira Meneguetti
- Programa de Pós-Graduação Stricto Sensu em Ciência da Saúde na Amazônia Ocidental, Universidade Federal do Acre, Rio Branco, AC, Brasil.,Programa de Pós-Graduação Stricto Sensu em Ciência, Inovação e Tecnologia para a Amazônia, Universidade Federal do Acre, Rio Branco, AC, Brasil.,Colégio de Aplicação, Universidade Federal do Acre, Rio Branco, AC, Brasil.,Programa de Pós-Graduação em Biodiversidade e Biotecnologia, Rio Branco, AC, Brasil
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