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Biologic Development of Triatoma mexicana (Herrich-Schaeffer 1848) (Hemiptera: Reduviidae: Triatominae) under Laboratory Conditions
M.A. Becerril-Flores,A. Aguilar-Hernandez,J.L. Imbert-Palafox
International Journal of Tropical Medicine , 2012,
Abstract: Triatoma mexicana is one of the triatomine species whose biologic development is yet unknown, but it is frequently reported to be infected by Trypanosoma cruzi. In this research, we explore the life cycle and reproductive and feeding patterns of T. mexicana under laboratory conditions. Ten female and 12 male insects were collected to make up a artificial colony. The deposited eggs were maintained in the laboratory under 3 different conditions: 27 C and 66% humidity, 26 C and 35% humidity and 19 C and 45% humidity (these last were room temperature and humidity). Nymph and adult insects were fed on CD-1 mice and chicken once a week in order to study the alimentary preference of this triatomine species. Our observations were that 71.5% of successful hatching took place at 27 C and 66% humidity, therefore were the better environmental conditions for T. mexicana. Out of successfully hatched ones, 8% survived till adulthood, in which 2.5% were males and 5.5% were females, at the end of 338.66 35.38 days. In the adult phase, the insects survived between 100 and 190 days. In 1st to 4th instars, T. mexicana was fed for 1-3 times; in 5th instar for 1-4 times and in adulthood for 3-7 times. Each feeding occurred at an interval of 15-34 days. The morphologic characteristics of every instar phase are described by photographs. Through this research, biologic cycle and survival conditions of T. mexicana were explored for the first time.
Triatoma mexicana Herrich-Schaeffer (Hemiptera: Reduviidae: Triatominae) Descripción de la Genitalia Externa del Macho y Morfología Externa de la Hembra Triatoma mexicana Herrich-Schaeffer (Hemiptera: Reduviidae: Triatominae) Description of the External Male Genitalia and External Morphology of the Female  [cached]
Paz María Salazar Schettino,Gloria Elena Rojas Wastavino,José Santiago Rosales Pi?a,Mauro Omar Vences Blanco
EntomoBrasilis , 2013, DOI: 10.12741/ebrasilis.v6i1.275
Abstract: Triatoma mexicana fue descrita originalmente en 1848 por Herrich-Schaeffer nombrándola Conorhinus mexicanus Herrich-Schaeffer. Actualmente se registra su hallazgo en los estados de Guanajuato, Hidalgo Querétaro y San Luis Potosí. Los estudios sobre su distribución espacial, índices entomológicos, presencia en el intradomicilio y peridomicilio, biología y riesgo de transmisión de Trypanosoma cruzi Chagas demuestran que es una especie importante desde el punto de vista de salud pública. Con el propósito de ampliar el conocimiento biológico sobre la especie, en el presente estudio se hace la descripción de la hembra así como la genitalia externa del macho, en ejemplares capturados en el estado de Guanajuato. Triatoma mexicana was originally described in 1848 by Herrich-Schaeffer, naming Conorhinus mexicanus Herrich-Schaeffer. Its finding is currently registered in the States of Guanajuato, Hidalgo, Querétaro, and San Luis Potosí. Studies about the spatial distribution, the entomological indices, it presence indoor an outdoor in houses, it biology and risk of transmission of Trypanosoma cruzi Chagas show that it is an important species from the point of view of public health. With the purpose of extending the biological knowledge of this species, the present study is the description of the female as well as the external male genitalia, in specimens captured in the State of Guanajuato.
Alguns aspectos da biologia de Triatoma pseudomaculata Corrêa & Espínola, 1964, em condi??es de laboratório (Hemiptera:Reduviidae:Triatominae)
Memórias do Instituto Oswaldo Cruz , 1997, DOI: 10.1590/S0074-02761997000200024
Abstract: biology of triatoma pseudomaculata corrêa & espínola, 1964, under laboratory conditions (hemiptera:reduviidae:triatominae) - observations were made on the evolutive cycle of triatoma pseudomaculata, held under laboratory conditions, fed weekly on bird (pigeon). of 60 eggs obtained, only 34 nymphs reached the adult stage in a period of x(s)=398±76 days. the following parameters were observed: the time immature stages took to develop from egg to adult emergence; the occurrence of the first meal; the time-lapse between the presenting of the blood-meal and the begining of feeding; time of feeding; amount of blood ingested; variation of weight 24 hr after the blood-meal and until the next blood-meal; and the defecation pattern. the experiment was carried out for 20 months, held in bod incubator with the average of temperature and humidity of 28±1oc and 80±5% ru, respectively
Alguns aspectos da biologia de Triatoma pseudomaculata Corrêa & Espínola, 1964, em condi es de laboratório (Hemiptera:Reduviidae:Triatominae)  [cached]
Gon?alves Teresa Cristina M,Cunha Vanda,Oliveira Edson de,Jurberg José
Memórias do Instituto Oswaldo Cruz , 1997,
Abstract: Biology of Triatoma pseudomaculata Corrêa & Espínola, 1964, under Laboratory Conditions (Hemiptera:Reduviidae:Triatominae) - Observations were made on the evolutive cycle of Triatoma pseudomaculata, held under laboratory conditions, fed weekly on bird (pigeon). Of 60 eggs obtained, only 34 nymphs reached the adult stage in a period of X(S)=398±76 days. The following parameters were observed: the time immature stages took to develop from egg to adult emergence; the occurrence of the first meal; the time-lapse between the presenting of the blood-meal and the begining of feeding; time of feeding; amount of blood ingested; variation of weight 24 hr after the blood-meal and until the next blood-meal; and the defecation pattern. The experiment was carried out for 20 months, held in BOD incubator with the average of temperature and humidity of 28±1oC and 80±5% RU, respectively
Perfil electroforético de proteínas presentes en la saliva de Triatoma dimidiata (Hemiptera: Reduviidae:Triatominae) Electrophoretic profile of salivary proteins of Triatoma dimidiata (Hemiptera: Reduviidae:Triatominae)  [cached]
Mónica Flórez,Rocío del Pilar Ni?o,Rodrigo Gonzalo Torres,Gerardo Mu?oz
Revista de la Universidad Industrial de Santander. Salud , 2009,
Abstract: Introducción: Los triatominos (Hemiptera: Reduviidae:Triatominae) son insectos hematófagos que secretan una saliva rica en proteínas con propiedades anticoagulantes, antihistamínicas, vasodilatadoras y antiplaquetarias que facilitan su proceso de alimentación en el huésped vertebrado y favorecen la transmisión a éste de los protozoarios que se desarrollan en sus glándulas salivales. Estas proteínas son características de cada especie de triatomino y pueden ayudar a diferenciar especies, incluso aquellas fenotípicamente similares. Objetivo: Describir los perfiles electroforéticos de las proteínas salivales de Triatoma dimidiata encontrados en el intradomicilio, peridomicilio y extradomicilio en un área endémica en Santander. Materiales y métodos: Se disectaron las glándulas salivales de insectos adultos de T. dimidiata de tres municipios de Santander procedentes de colonias de laboratorio y de campo. Los perfiles de proteínas se visualizaron realizando una electroforesis de una dimensión en geles de poliacrilamida tenidos con azul de Coomassie. Resultados: Los perfiles electroforéticos de las proteínas presentes en la saliva de T. dimidiata muestran hasta 33 bandas en el rango de 23,7 a 228,8 kDa, con una alta concentración en la región 41 a 99,7 kDa. El índice de polimorfismo para T. dimidiata fue de 0,9646. Conclusión: El perfil electroforético de las proteínas salivares de T. dimidiata mostró una composición proteica compleja, donde las bandas más prominentes tienen pesos moleculares menores de 45 KDa. No se pudieron establecer agrupamientos basados en las regiones geográficas y lugares de captura, a pesar de la gran variabilidad intraespecífica observada. Sin embargo, se pudieron establecer diferencias claras a nivel de especie entre T. dimidiata y el grupo externo utilizado, P. geniculatus. Salud UIS 2009; 41: 121-127. Introduction: The triatomines (Heteroptera, Reduviidae, Triatominae) are hematophagous insects that secrete saliva rich in proteins with anticoagulant, antihistamine, vasodilator and platelet inhibitor properties, these facilitate its alimentary process on the vertebrate host and facilitate transmission of the protozoa carried in the salivary glands of the triatomines. Such proteins are characteristic of each triatomine species and might help differentiate species, including those phenotypically similar. Objective: Describe electrophoretic profiles of salivary proteins of Triatoma dimidiata found inside, around and outside residences in an endemic area of Santander. Materials and methods: Salivary glands from adult insects of T. dimidi
Hermanlentia n. gen. da tribo Triatomini, com um rol de espécies de Triatominae (Hemiptera, Reduviidae)
Memórias do Instituto Oswaldo Cruz , 1997, DOI: 10.1590/S0074-02761997000200009
Abstract: hermanlentia n. gen. of tribe triatomini, with a list of species of triatominae (hemiptera, reduviidae) - hermanlentia n. gen. was established in the tribe triatomini, based on differences of external morphology, phallic structures and chromatic characters of triatoma matsunoi fernandez-loayza 1989, in relation to other species of triatoma. the head is long with disproportionally small eyes 1:0,16; the relation of the head and the pronotum is 1: 0,4; and the coloration of the hemelytron is whitish. characters of the male genitalia that distinguish the new genus are the articulatory apparatus with twice the size of the aedeagus, phallosoma with fingerlike apex, 1 + 1 dorsal conjuntive processes with the inner edge toothed, and absence of endosoma process and vesica
Hermanlentia n. gen. da tribo Triatomini, com um rol de espécies de Triatominae (Hemiptera, Reduviidae)  [cached]
Jurberg José,Galv?o Cleber
Memórias do Instituto Oswaldo Cruz , 1997,
Abstract: Hermanlentia n. gen. of Tribe Triatomini, with a List of Species of Triatominae (Hemiptera, Reduviidae) - Hermanlentia n. gen. was established in the tribe Triatomini, based on differences of external morphology, phallic structures and chromatic characters of Triatoma matsunoi Fernandez-Loayza 1989, in relation to other species of Triatoma. The head is long with disproportionally small eyes 1:0,16; the relation of the head and the pronotum is 1: 0,4; and the coloration of the hemelytron is whitish. Characters of the male genitalia that distinguish the new genus are the articulatory apparatus with twice the size of the aedeagus, phallosoma with fingerlike apex, 1 + 1 dorsal conjuntive processes with the inner edge toothed, and absence of endosoma process and vesica
Levantamento da fauna de Triatominae (Hemiptera: Reduviidae) em ambiente domiciliar e infec??o natural por Trypanosomatidae no Estado de Mato Grosso do Sul
Almeida, Paulo Silva de;Ceretti Júnior, Walter;Obara, Marcos Takashi;Santos, Honório Roberto;Barata, José Maria Soares;Faccenda, Odival;
Revista da Sociedade Brasileira de Medicina Tropical , 2008, DOI: 10.1590/S0037-86822008000400010
Abstract: between 2000 and 2004, a survey of triatominae fauna (hemiptera: reduviidae) and examination of natural infection caused by trypanosomatidae in the state of mato grosso do sul, brazil, was conducted. a total of 13,671 specimens were collected. through fauna analysis on the insects that were caught, triatoma sordida was characterized as very abundant, very frequent, constant and dominant. the rates of natural infection with trypanosoma cruzi were 3.2% for panstrongylus geniculatus, 0.6% for rhodnius neglectus and 0.1% for triatoma sordida. nevertheless, the state of mato grosso do sul is free from endemic vector transmission.
Morfologia Externa de Triatoma carcavalloi Jurberg, Rocha & Lent (Hemiptera: Reduviidae: Triatominae) Através da Microscopia ótica e Microscopia Eletr nica de Varredura  [cached]
Jacenir Reis dos Santos-Mallet,Margareth Cardozo-de-Almeida,Shenia Corrêa Novo,Teresa Cristina Monte Gon?alves
EntomoBrasilis , 2008,
Abstract: Resumo. Triatoma carcavalloi Jurberg, Rocha & Lent é uma espécie com distribui o geográfica restrita ao Estado do Rio Grande do Sul, hábitos silvestres, vivendo em simpatria com Triatoma rubrovaria (Blanchard) e Triatoma circummaculata (Stal). Diferen as morfo-estruturais na regi o cefálica de adultos foram ilustradas. Na análise morfológica das antenas de T. carcavalloi foi verificado em machos e fêmeas a ocorrência de 14 tricobótrias no terceiro e quarto segmento antenal. Na cabe a a presen a de 1+1 manchas pós-ocelares. Nos fêmures das pernas de ambos os sexos foi encontrado um par muito pequeno de dentículos subapicais. As fossetas esponjosas foram encontradas somente nos machos, nas tíbias das pernas anteriores e medianas. O estudo do rostro é importante para a caracteriza o da subfamília Triatominae, assim como o sulco estridulatório e a búcula. A búcula possui borda grossa, superfície granular e forma de “U”. O rostro é similar em ambos os sexos. A placa apical tem forma de diamante na lamela inferior e forma digitiforme na lamela superior. No ápice do rostro duas fendas laterais 1+1 foram observadas. O sulco estridulatório desta espécie tem a forma de "V" e é mais largo nas fêmeas do que nos machos. Esta é a primeira descri o morfológica destas estruturas em adultos de T. carcavalloi usando a microscopia eletr nica de varredura. Estes resultados relacionados aos estudos morfológicos realizados em T. carcavalloi evidenciam a importancia destas estruturas para caracteriza o específica.External Morphology of Triatoma carcavalloi Jurberg, Rocha & Lent (Hemiptera: Reduviidae: Triatominae) by Optical and Scanning Electron MicroscopyAbstract. Triatoma carcavalloi Jurberg, Rocha & Lent is specie with restricted geographic distribution to the State of Rio Grande do Sul, rupestrial habits, living currently in simpatry with Triatoma rubrovaria (Blanchard) and Triatoma circummaculata (Stal). Morpho-structural differences in the cephalic region of the adults had also been illustrated. In the morphological analysis of the antennas of T. carcavalloi it was verified the occurrence in both, male and females, more than 14 trichobotrium, in the third and fourth antennal articles. In the head the presence of 1+1 post-ocelares spots. In the legs, a pair of sub-apical dentices in femures of both male and female was found. Spongy fossette had been found only in the males, in the tibias of the previous and medium legs. The study of rostrum is important to the characterization of the subfamily Triatominae, as well as the stridulatory sulcus and buccula. The buccula
Hemolymphatic components in vectors of Trypanosoma cruzi: study in several species of the subfamily Triatominae (Hemiptera: Reduviidae)
Canavoso, Lilián Etelvina;Rubiolo, Edilberto René;
Revista do Instituto de Medicina Tropical de S?o Paulo , 1993, DOI: 10.1590/S0036-46651993000200003
Abstract: the members of the subfamily triatominae (hemiptera : reduviidae) comprise a great number of species of medical importance in the transmission of the t. cruzi (american trypanosomiasis). the aim of this study was to contribute to the knowledge about the chemical composition in proteins, lipids, lipoproteins, and carbohydrates of vectors of chagas' disease corresponding to twelve members of the subfamily triatominae. this study was carried out in ninphs of the fifth instar and adult males of the species: t. delpontei, t. dimidiata, t. guasayana, t. infestans, t. mazzotti, t. pallidipennis, t. patagonica, t. platensis, t. rubrovaria, t. sordida of the triatoma genus, and d. maximus and p. megistus of the dipatalogaster and panstrongylus genera respectively. the results show on one hand, qualitative differences in the protein composition, and on the other hand, similarity in the lipoprotein profiles. lipids, proteins, and carbohydrates did not show significant differences between species or/and stages.
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