Analysis of antenal sensilla patterns of Rhodnius prolixus from Colombia and Venezuela

Esteban, Lyda; Angulo, Vı́ctor Manuel; Feliciangeli, M. Dora; Catalá, Silvia

doi:10.1590/s0074-02762005000800014

Cited by 16 publications

(12 citation statements)

References 19 publications

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“…4B). A reduction in BR sensilla could be due also to differences in the geographic origin of the two populations as suggested by Esteban et al (2005).…”

Section: Discussionmentioning

confidence: 93%

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Behavioural responses to human skin extracts and antennal phenotypes of sylvatic first filial generation and long rearing laboratory colony Rhodnius prolixus

Ortiz

Suárez-Rivillas

Molina

2011

Mem. Inst. Oswaldo Cruz

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“…4B). A reduction in BR sensilla could be due also to differences in the geographic origin of the two populations as suggested by Esteban et al (2005).…”

Section: Discussionmentioning

confidence: 93%

“…1) (Catalá & Schofield 1994, Catalá 1997, Gracco & Catalá 2000, Carbajal de la Fuente & Catalá 2002, Catalá et al 2004, Esteban et al 2005, Villela et al 2005.…”

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Behavioural responses to human skin extracts and antennal phenotypes of sylvatic first filial generation and long rearing laboratory colony Rhodnius prolixus

Ortiz

Suárez-Rivillas

Molina

2011

Mem. Inst. Oswaldo Cruz

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“…Por consiguiente, como lo han recomendado varios autores (50)(51)(52), es necesario continuar elaborando trabajos para establecer y evaluar el impacto de esta nueva situación caracterizada por las altas tasas de infestación de R. prolixus en palmas próximas a viviendas y su frecuente intrusión, con el fin de orientar el diseño adecuado de estrategias de prevención y control que disminuyan el riesgo de contacto de las poblaciones humanas con R. prolixus silvestre.…”

Section: Discussionunclassified

Attalea butyracea próximas a las viviendas como posible fuente de infestación domiciliaria por Rhodnius prolixus (Hemiptera: Reduviidae) en los Llanos Orientales de Colombia

2012

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Introducción. La presencia de Rhodnius prolixus en palmas en los Llanos Orientales, zona de alto riesgo para la infección por Trypanosoma cruzi, y su frecuente visita al intradomicilio, hacen necesario confirmar este hábitat como posible fuente de infestación. Objetivo. Comprobar la infestación por R. prolixus en Attalea butyracea próximas a viviendas en los Llanos Orientales. Materiales y métodos. Se examinaron palmas próximas a las viviendas rurales en los departamentos de Casanare y Arauca, utilizando trampas con cebo vivo, y mediante búsqueda activa y vigilancia comunitaria, se recolectaron triatominos en el intradomicilio. Con criterios morfológicos se determinó la especie recolectada y con la técnica de PCR se estableció la infección natural. Resultados. Se recolectaron 529 ninfas y adultos de R. prolixus y 5 ninfas de Eratyrus mucronatus en 111/172 (64,53 %) A. butyracea ubicadas a menos de 500 m de las viviendas. En el mismo periodo se recolectaron en el intradomicilio 132 R. prolixus y especímenes de Psammolestes arthuri, Cavernicola pilosa, Triatoma maculata, Panstrongylus geniculatus y 20 ninfas de E. mucronatus en un cúmulo de adobes en el corredor de una vivienda. Se detectó infección natural por T. cruzi en 28,76 % de R. prolixus de palmas y 30 % del intradomicilio. Conclusiones. Los resultados del presente estudio revelan una nueva situación epidemiológica de transmisión de la enfermedad de Chagas, caracterizada por las altas tasas de infestación de R. prolixus en palmas próximas a viviendas y su frecuente intrusión; su impacto debe ser evaluado para diseñar medidas de prevención de la enfermedad.Palabras clave: Rhodnius, Triatominae, enfermedad de Chagas, Trypanosoma cruzi, Colombia.Attalea butyracea palms adjacent to housing as a source of infestation by Rhodnius prolixus (Hemiptera: Reduviidae) Introduction. The presence of Rhodnius prolixus in palms on the eastern plains area of Colombia provide a high risk for infection with Trypanosoma cruzi. Intensive surveillance of the palm tree habitat are necessary to confirm the presence of bugs and provide evidence that this habitat is a source of house infestations. Objective. The infestation by R. prolixus in the palm, Attalea butyracea, was investigated near homes for assessment of risk. Materials and methods. Palms were examined for Rhodnius bugs adjacent to rural housing in the eastern plains provinces of Casanare and Arauca, Colombia. Bait traps were used as well as an active search by the investigators and a community watch program to collect intradomiciliary triatomine bugs. Collected species were identified by morphological criteria,and natural T.cruzi infections in the triatomine bugs were detected by the PCR technique. Results. In 111 of 172 (64.5%) palms (A. butyracea) inspected, 529 nymphs and adults of R. prolixus and 5 nymphs of Eratyrus mucronatus were collected. The A. butyracea were located within 500 m of housing. In the same period, 132 R. prolixus and specimens of the triatomine species Psammolestes arthuri, Cavernicola pilosa, Tr...

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“…The types and size of sensilla may also vary depend upon the geographical distribution of insects. For example, different patterns of trichoid and basiconic sensilla numbers were described in different populations of Rhodnius prolixus (Stål, 1859) (Heteroptera, Reduviidae, Triatominae) sampled from east and west of the Andes Mountains (Esteban et al, 2005). These differences suggest that the geographically isolation of the populations was associated with the numbers of antennal sensilla (Esteban et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Morphological and morphometric studies of the antennal sensilla from two populations of Atta robusta (Borgmeier 1939) (Hymenoptera: Formicidae)

De¹,

Martins²,

Tm³

2013

Braz. J. Biol.

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The ant Atta robusta is endemic to the "restinga" ecosystems where it has an important role in the dynamics of seed dispersal. Despite its importance, A. robusta is considered a threatened species. In this study we analyzed the antennal sensory organs of two different populations of A. robusta (from the cities of São Mateus and Maricá in in Espírito Santo and Rio de Janeiro States, respectively) using a scanning electron microscope (SEM). SEM revealed different types of sensilla in the A. robusta antennae, i.e., curved and straight trichoid, basiconic, ampullacea and coeloconic, which were highly abundant found in the distal flagellomeres (F) compared with other antenna regions. There were differences in samples collected from two locations in terms of the sensilla number and length. The average numbers of straight and curved trichoid sensillae numbers were different in F9 and F8, respectively, while the average length of the curved trichoid sensilla was only different in F9. These variations in sensory organs between two populations of A. robusta may indicate an adaptation of this species to different environmental conditions. The number of straight trichoid sensilla was only significantly different in F9.Keywords: Attini, scanning electron microscopy, sensory organs.Estudo morfológico e morfométrico das sensilas antenais de Atta robusta (Borgmeier 1939) (Hymenoptera: Formicidae) ResumoAtta robusta é uma espécie de formiga endêmica, com papel importante na dinâmica dos ecossistemas de restinga. Apesar de sua importância como dispersora de sementes nesse tipo de ecossistema, essa espécie encontra-se ameçada de extinção. O presente trabalho lançou mão da microscopia eletrônica de varredura (MEV) para descrever as sensilas antenais de A. robusta e investigar diferenças entre sensilas antenais dessa espécie em indivíduos coletados em localidades diferentes, nos municípios de São Mateus (Estado do Espírito Santo) e Maricá (Estado do Rio de Janeiro). Diferentes tipos de sensilas como tricoideas retas e curvadas, basicônicas, ampuláceas e celocônicas foram encontradas nas antenas, sendo que todas são mais numerosas no flagelomero nove (F9) ou mais distal. Houve diferença em número e em comprimento das sensilas tricoideas retas e curvatas em F8 e F9 entre os indivíduos das duas localidades. Os números médios das sensilas tricoides retas e curvadas foram diferentes para os F9 e F8, respectivamente, enquanto que o comprimento médio das sensilas tricoides curvadas foi diferente para o F9. Essa variação na quantidade de sensilas antenais entre as populações é, possivelmente, uma plasticidade fenotípica, característica importante para a adaptação de espécies a variações ambientais. Esse trabalho representa um estudo preliminar na tentativa de se estudar a variação nos órgãos sensoriais entre diferentes populações de A. robusta.Palavras-chave: Attini, microscopia eletrônica de varredura, órgão sensorial.

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Analysis of antenal sensilla patterns of Rhodnius prolixus from Colombia and Venezuela

Cited by 16 publications

References 19 publications

Behavioural responses to human skin extracts and antennal phenotypes of sylvatic first filial generation and long rearing laboratory colony Rhodnius prolixus

Behavioural responses to human skin extracts and antennal phenotypes of sylvatic first filial generation and long rearing laboratory colony Rhodnius prolixus

Attalea butyracea próximas a las viviendas como posible fuente de infestación domiciliaria por Rhodnius prolixus (Hemiptera: Reduviidae) en los Llanos Orientales de Colombia

Morphological and morphometric studies of the antennal sensilla from two populations of Atta robusta (Borgmeier 1939) (Hymenoptera: Formicidae)

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