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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). J Med Entomol 2023:7140379. [PMID: 37094884 DOI: 10.1093/jme/tjad032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [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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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). Med Vet Entomol 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] [What about the content of this article? (0)] [Affiliation(s)] [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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Santos-Mallet JR, Balthazar TD, Oliveira AA, Marques WA, Bastos AQ, Freitas SPC. The External Morphology of the Eggs of Culex (Culex) saltanensis (Diptera: Culicidae) Under Scanning Electron Microscopy. J Med Entomol 2021; 58:1134-1137. [PMID: 33295966 DOI: 10.1093/jme/tjaa271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2020] [Indexed: 06/12/2023]
Abstract
The aim of the present study was to describe the morphology of the eggs of Culex (Culex) saltanensis Dyar that occurs in the Neotropical region. Eggs of the Cx. (Cux.) saltanensis were collected at the Mata Atlântica FIOCRUZ campus, fixed in 1% osmium tetroxide, prepared for mounting on metal supports, observed under a scanning electron microscope, and described morphologically. The eggs had a coniform shape with a length of approximately 0.5 mm (505-510 µm) and a width in the median portion of 117 µm (113-123 µm). Upper portion is lined with tubers of irregular shape and varying sizes (0.64-1.31 µm), located on a cross-linked matrix forming bands observed under optical microscopy. The micropyle is encased in a necklace of approximately 6.6-µm plates arranged in a flower-like shape. Comparing Cx. (Cux.) saltanensis eggs with several species of different genera, important divergent characteristics can be observed. However, this study points to the need for new descriptions of eggs of species belonging to the same subgenus in order to analyze if there will be differences between them. Culex (Cux.) saltanensis eggs have particular characteristics not observed in eggs of other Culicidae genera.
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Affiliation(s)
- J R Santos-Mallet
- Laboratorio Interdisciplinar de Vigilância Entomológica em Díptera e Hemiptera, Instituto Oswaldo Cruz, FIOCRUZ, Av. Brasil 4365, Pavilhão Carlos Chagas, Manguinhos, Rio de Janeiro, RJ, Brazil
- Fundação Oswaldo Cruz Piauí, Rua Magalhães Filho 519, Centro, Teresina, PI, Brasil
- Universidade Iguaçu - UNIG, Av. Abílio Augusto Távora, 2134, Nova Iguaçu, RJ, Brasil
| | - T D Balthazar
- Laboratorio Interdisciplinar de Vigilância Entomológica em Díptera e Hemiptera, Instituto Oswaldo Cruz, FIOCRUZ, Av. Brasil 4365, Pavilhão Carlos Chagas, Manguinhos, Rio de Janeiro, RJ, Brazil
- Programa de Pós-graduação em Medicina Tropical, Instituto Oswaldo Cruz, FIOCRUZ, Av. Brasil, Manguinhos, Rio de Janeiro, RJ, Brazil
| | - A A Oliveira
- Laboratorio Interdisciplinar de Vigilância Entomológica em Díptera e Hemiptera, Instituto Oswaldo Cruz, FIOCRUZ, Av. Brasil 4365, Pavilhão Carlos Chagas, Manguinhos, Rio de Janeiro, RJ, Brazil
- Programa de Pós-graduação em Medicina Tropical, Instituto Oswaldo Cruz, FIOCRUZ, Av. Brasil, Manguinhos, Rio de Janeiro, RJ, Brazil
| | - W A Marques
- Laboratorio Interdisciplinar de Vigilância Entomológica em Díptera e Hemiptera, Instituto Oswaldo Cruz, FIOCRUZ, Av. Brasil 4365, Pavilhão Carlos Chagas, Manguinhos, Rio de Janeiro, RJ, Brazil
- Laboratório de Bioquímica de Insetos e Parasitos, Instituto de Biofísica Carlos Chagas, Universidade Federal do Rio de Janeiro, Av. Carlos Chagas Filho, 373, Ilha do Fundão, Rio de Janeiro, RJ, Brazil
| | - A Q Bastos
- Laboratorio Interdisciplinar de Vigilância Entomológica em Díptera e Hemiptera, Instituto Oswaldo Cruz, FIOCRUZ, Av. Brasil 4365, Pavilhão Carlos Chagas, Manguinhos, Rio de Janeiro, RJ, Brazil
- Programa de Pós-graduação em Biologia Animal, Universidade Federal Rural do Rio de Janeiro, Rodovia BR 465, Km 7 s/n, Seropédica, RJ, Brasil
- Laboratório de Diptera, Instituto Oswaldo Cruz, FIOCRUZ, Av. Brasil 4365, Pavilhão Carlos Chagas, Manguinhos, Rio de Janeiro, RJ, Brazil
| | - S P C Freitas
- Fundação Oswaldo Cruz Piauí, Rua Magalhães Filho 519, Centro, Teresina, PI, Brasil
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Cardozo de Almeida MAR, Freitas SPC, de Oliveira MLR, de Lima NRC, Ferreira Rangel E, Reis Santos-Mallet J. Characterization of the Buccula, Rostrum, Stridulatory Sulcus, Scutellum, and External Female Genitalia of Triatoma carcavalloi (Jurberg, Rocha & Lent, 1998), Triatoma circummaculata (Stål, 1859), and Triatoma rubrovaria (Blanchard, 1843) (Hemiptera, Reduviidae, Triatominae). J Parasitol Res 2019; 2019:3517098. [PMID: 31428466 PMCID: PMC6681587 DOI: 10.1155/2019/3517098] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2019] [Accepted: 07/01/2019] [Indexed: 11/18/2022] Open
Abstract
In Brazil, Triatoma rubrovaria (Blanchard, 1843) is the most important species in epidemiological terms in the State of Rio Grande do Sul, due to its wide geographical distribution in this state, followed by T. carcavalloi (Jurberg, Rocha & Lent, 1998) and T. circummaculata (Stål, 1859). Structural analysis of the ventral region of the head (rostrum and buccula), thorax (stridulatorium sulcus and scutellum), and external female genitalia of adults of T. rubrovaria, T. carcavalloi, and T. circummaculata is described here. Scutellum, head, rostrum, and part of the thorax (prosternum) containing the stridulatory sulcus, in both male and female, and the sixth abdominal segment of the female, containing the external genitalia, were processed for scanning electron microscopy studies as routine. Morphological differences in the analyzed structures for all the three Triatoma species studied were detected under scanning electron microscopy. This study confirms the grouping of the T. rubrovaria, T. carcavalloi, and T. circummaculata in 'T. rubrovaria subcomplex' by their morphological similarities.
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Affiliation(s)
- Margareth Alves Ribeiro Cardozo de Almeida
- Laboratório Interdisciplinar de Vigilância Entomológica em Diptera e Hemiptera, Instituto Oswaldo Cruz, FIOCRUZ, Av. Brasil 4365, Pavilhão Carlos Chagas, 5° Andar, Rio de Janeiro, RJ 21040-360, Brazil
- Bolsista Treinamento e Capacitação Técnica, FAPERJ, Av Erasmo Braga 118, Rio de Janeiro, RJ 20020-000, Brazil
- Laboratório de Biodiversidade Entomológica, Instituto Oswaldo Cruz, FIOCRUZ, Av. Brasil 4365. Pavilhão Mourisco, Sala 214, Rio de Janeiro, RJ 21040-360, Brazil
| | - Simone Patrícia Carneiro Freitas
- Laboratório Interdisciplinar de Vigilância Entomológica em Diptera e Hemiptera, Instituto Oswaldo Cruz, FIOCRUZ, Av. Brasil 4365, Pavilhão Carlos Chagas, 5° Andar, Rio de Janeiro, RJ 21040-360, Brazil
| | - Maria Luiza Ribeiro de Oliveira
- Laboratório Interdisciplinar de Vigilância Entomológica em Diptera e Hemiptera, Instituto Oswaldo Cruz, FIOCRUZ, Av. Brasil 4365, Pavilhão Carlos Chagas, 5° Andar, Rio de Janeiro, RJ 21040-360, Brazil
| | - Nathanielly Rocha Casado de Lima
- Laboratório Interdisciplinar de Vigilância Entomológica em Diptera e Hemiptera, Instituto Oswaldo Cruz, FIOCRUZ, Av. Brasil 4365, Pavilhão Carlos Chagas, 5° Andar, Rio de Janeiro, RJ 21040-360, Brazil
| | - Elizabeth Ferreira Rangel
- Laboratório Interdisciplinar de Vigilância Entomológica em Diptera e Hemiptera, Instituto Oswaldo Cruz, FIOCRUZ, Av. Brasil 4365, Pavilhão Carlos Chagas, 5° Andar, Rio de Janeiro, RJ 21040-360, Brazil
| | - Jacenir Reis Santos-Mallet
- Laboratório Interdisciplinar de Vigilância Entomológica em Diptera e Hemiptera, Instituto Oswaldo Cruz, FIOCRUZ, Av. Brasil 4365, Pavilhão Carlos Chagas, 5° Andar, Rio de Janeiro, RJ 21040-360, Brazil
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Oliveira MLRD, Camara DCP, Freitas SPC, Santos-Mallet JR. Spermatological Morphology of Triatoma Species (Hemiptera: Reduviidae: Triatominae). J Med Entomol 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] [What about the content of this article? (0)] [Affiliation(s)] [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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Baffa AF, Camara DCP, Santos-Mallet JR, DA Silva ER, Costa J, Freitas SPC. Sperm dimorphism in the Triatoma brasiliensis species complex and its applications. Med Vet Entomol 2017; 31:192-199. [PMID: 28117911 DOI: 10.1111/mve.12226] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2016] [Revised: 11/08/2016] [Accepted: 11/13/2016] [Indexed: 06/06/2023]
Abstract
Morphological and structural features of the sperm of the Triatoma brasiliensis Neiva, 1911 (Hemiptera: Reduviidae) species complex were examined in this first study investigating the sperm of Heteroptera and the genus Triatoma. Males were dissected and their seminal vesicles removed. For measurement, seminal vesicles were squashed on glass slides, spread, fixed and observed under a photomicroscope. The images were analysed and measures of sperm were made. Data were analysed using one-way analysis of variance and Tukey's test to detect differentiation among taxa. Furthermore, seminal vesicles were prepared for studies of transmission electron microscopy. All taxa studied showed polymorphic (short and long) sperm. The sperm of Triatoma brasiliensis macromelasoma was significantly longer (in total length) than that of the other four members of the complex, which supports the hypothesis of hybrid speciation of this member of the complex as an increase in the size of typical hybrids under heterosis was previously shown. The sperm cells of the five taxa have similar ultrastructural morphology. The ultrastructural features observed confirm the hypothesis, raised by previous studies, that they are synapomorphic to the suborder Heteroptera.
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Affiliation(s)
- A F Baffa
- Laboratório Interdisciplinar de Vigilância Entomológica em Diptera e Hemiptera, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, Brazil
- Laboratório de Insetos Aquáticos, Universidade Federal do Estado do Rio de Janeiro, Rio de Janeiro, Brazil
| | - D C P Camara
- Laboratório de Mosquitos Transmissores de Hematozoários, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, Brazil
| | - J R Santos-Mallet
- Laboratório Interdisciplinar de Vigilância Entomológica em Diptera e Hemiptera, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, Brazil
| | - E R DA Silva
- Laboratório de Insetos Aquáticos, Universidade Federal do Estado do Rio de Janeiro, Rio de Janeiro, Brazil
| | - J Costa
- Laboratório de Biodiversidade Entomológica, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, Brazil
| | - S P C Freitas
- Laboratório Interdisciplinar de Vigilância Entomológica em Diptera e Hemiptera, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, Brazil
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Gonçalves TCM, Freitas ALC, Freitas SPC. Surveillance of Chagas disease vectors in municipalities of the state of Ceará, Brazil. Mem Inst Oswaldo Cruz 2010; 104:1159-64. [PMID: 20140377 DOI: 10.1590/s0074-02762009000800013] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2009] [Accepted: 10/19/2009] [Indexed: 11/22/2022] Open
Abstract
The present study aimed to analyse the dwelling infestation rates and the distribution and natural Trypanosoma cruzi infection rates, among triatomines captured in the 13 municipalities of the state of Ceará. The records relating to the capture of intradomicile and peridomicile triatomines during the Chagas disease control program of 1998-2008 were available. Among the triatomines captured and in all of the municipalities studied, Triatoma brasiliensis presented the highest incidence in intradomicile and Triatoma pseudomaculata in peridomicile and some were positive for infection by T. cruzi. We emphasise that it is important to have sustainable epidemiological surveillance in the region, since when the control measures decreased, the incidence of T. pseudomaculata in intradomicile grew.
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Affiliation(s)
- Teresa Cristina Monte Gonçalves
- Setor de Entomologia Médica e Forense, Laboratório de Transmissores de Leishmanioses, Instituto Oswaldo Cruz-Fiocruz, Rio de Janeiro, Brasil.
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Freitas SPC, Gonçalves TCM, Serrão JE, Santos-Mallet JR. Fine structure of the male accessory glands ofTriatoma rubrofasciata (De Geer, 1773) (Hemiptera, Triatominae). Microsc Res Tech 2007; 70:355-60. [PMID: 17262786 DOI: 10.1002/jemt.20419] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Male of Triatoma rubrofasciata has four elongated sac-like reproductive mesodermic accessory glands, lined by an inner single layer of secretory cells, with basal plasma membrane infolds and short apical microvilli, and externally enveloped by a thin visceral muscle layer. The secretory cells have a well-developed rough endoplasmic reticulum, Golgi complex, mitochondria, and secretory granules. In one day old adult the gland cells are poorly developed, presenting small, electron-transparent secretory granules scattered among the rough endoplasmatic reticulum, whereas in three days old adult these cells have the cisternae of the rough endoplasmatic reticulum varing size degree, filled with granular electrondense content. In five days old males the secretory granules increase in diameter, being released to the gland lumen. Therefore, there is an increase of the secretory activity according to male maturation.
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Gonçalves TCM, Freitas SPC, Santos-Mallet JRD, Serrão JE, Lorosa ES. Morphometry of the testis follicles in Triatoma rubrofasciata (De Geer, 1773) (Hemiptera, Triatominae). ANIM BIOL 2007. [DOI: 10.1163/157075607782232125] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
AbstractThe male reproductive tract in Triatominae has a pair of testes, two vasa deferentia, a pair of seminal vesicles, four pairs of accessory glands, and an ejaculatory duct, which opens in the aedeagus. In species of the genus Triatoma each testis is formed by seven testicular follicles. Because Triatoma rubrofasciata has a common ancestor with species of Triatoma occurring in North America and because the length of testis follicles varies among different species of Triatoma a morphometrical analysis of the follicles was conducted. Triatoma rubrofasciata has seven testis follicles of variable length that are similar between left and right testes. The statistics allowed the classification in a long follicle, two medium follicles, two that are short, and two that are very short. This finding is compared with data available for other Triatominae and it is emphasized that the length of follicles testis should be included in future phylogenetic analysis of Triatominae.
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Affiliation(s)
- Teresa Cristina Monte Gonçalves
- 1Núcleo de Morfologia e Ultraestrutura de Artrópodes, Departamento de Entomologia, FIOCRUZ, Rio de Janeiro, 21045-900, Brazil
| | | | - Jacenir Reis Dos Santos-Mallet
- 3Núcleo de Morfologia e Ultraestrutura de Artrópodes, Departamento de Entomologia, FIOCRUZ, Rio de Janeiro, 21045-900, Brazil
| | - José Eduardo Serrão
- 4Departamento de Biologia Geral, Universidade Federal de Viçosa, Minas Gerais, Brazil
| | - Elias Seixas Lorosa
- 5Laboratório de Referência Nacional e Internacional em Taxonomia de Triatomíneos, Departamento de Entomologia, FIOCRUZ, Rio de Janeiro, Brazil
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Abstract
OBJETIVO: Triatoma pseudomaculata, espécie peridomiciliar, é encontrada apresentando baixa taxa de infecção por Trypanosoma cruzi. Com o objetivo de identificar os possíveis reservatórios de T. cruzi, investigou-se a ocorrência desse triatomíneo no domicílio, bem como suas fontes alimentares. MÉTODOS: De janeiro de 2001 a julho de 2002 foram capturados 921 espécimes de T. pseudomaculata em 13 municípios do sul do Estado do Ceará. O conteúdo intestinal dos triatomíneos foi retirado, espalhado em disco de papel de filtro e analisado por precipitina para os seguintes anti-soros: ave, roedor, cão, gambá, lagarto, boi/cabra, gato, porco, barata e humano. A investigação da presença de T. cruzi foi feita observando-se parte do conteúdo intestinal dos insetos a fresco, entre lâmina e lamínula, e pela sua semeadura em meio de cultura. RESULTADOS: Do total examinado, 184 (90,6%) foram positivos para os anti-soros testados: ave (62,5%)> roedor (33,7%)> cão (20,1%)> gambá (9,8%)> lagarto (5%)> boi-cabra (5%)> gato (2,7%)> porco (2,2%)> barata (2,2%)> humano (1,6%). As alimentações variaram de zero (não reagiram) a quatro da seguinte forma: não reagiram (9,4%), uma (57,1%), duas (26%), três (7%) ou quatro (0,5%). Das fontes alimentares identificadas apenas três espécimes (1,6%) foram positivos para T. cruzi. CONCLUSÕES: A baixa incidência de sangue humano mostra que T. pseudomaculata está bem adaptado ao peridomicílio. Porém, a vigilância epidemiológica na região sul do Estado do Ceará se faz necessária tendo em vista a proximidade da espécie ao domicílio.
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Affiliation(s)
- Simone Patrícia Carneiro Freitas
- Núcleo de Morfologia e Ultraestrutura de Vetores, Laboratório de Transmissores de Leishmanioses, Instituto Oswaldo Cruz (Fiocruz), Av. Brasil, 4365 Manguinhos, 21045-900 Rio de Janeiro, RJ, Brazil
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Abstract
From January 2001 to October 2002 captures were made in domicile and peridomiciliary areas of 13 cities of region of Cariri, south of the State of Ceará. As results, the occurrence of P. lutzi in this area was noticed, for the first time, in three cities: the presence of one adult in chicken house in Altaneira, one adult flying, in Salitre and 18 nymphs in Varzea Alegre(13 in bricks pile and five in roofing tile pile). In Varzea Alegre city it was observed the colonization in the peridomicile.
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Freitas SPC, Freitas ALC, Prazeres SDM, Gonçalves TCM. Influência de hábitos antrópicos na dispersão de Triatoma pseudomaculata Corrêa & Espínola, 1964, através de Mimosa tenuiflora (Willdenow) (Mimosaceae) no Estado do Ceará, Brasil. CAD SAUDE PUBLICA 2004; 20:333-6. [PMID: 15029337 DOI: 10.1590/s0102-311x2004000100052] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Triatoma pseudomaculata foram capturados em entrecascas de Mimosa tenuiflora (jurema-preta) em ecótopo silvestre de sete municípios do Estado do Ceará. Esta planta apresenta alta taxa de cobertura geográfica nas áreas de caatingas, sendo freqüentemente utilizada pela população rural. A presença de triatomíneos no peridomicílio, na região do Cariri, pode estar associada ao uso pela população da madeira de M. tenuiflora, quando trazida do ambiente silvestre, repleta de triatomíneos, facilitando conseqüentemente sua mobilização e dispersão.
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Affiliation(s)
- Simone Patrícia Carneiro Freitas
- Laboratório de Transmissores de Leishmanioses, Departamento de Entomologia, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brasil.
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