Patterns of antenal sensilla of Panstrongylus megistus from three Brazilian states

Villela, Marcos Marreiro; Catalá, Silvia; Juberg, J.; Silva, I. G.; Dias, João Carlos Pinto

doi:10.1590/s0074-02762005000700002

Cited by 14 publications

(14 citation statements)

References 17 publications

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“…In addition, sensilla from the dorsal surface of the last three flagellomeres (F7, F8, and F9) were classified according to the morphological criteria specified by Silvade-Moraes and Cruz-Landim (1972) and papers therein. These three flagellomers were choose based in the previous assumption that sensilla are concentrated in these insect antennal parts that are also the most exposed (Villela et al, 2005). Finally, the straight and curved trichoid sensilla (the most abundant) were counted.…”

Section: Analysis Of the Antennamentioning

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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Section: Analysis Of the Antennamentioning

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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“…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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“…Other mechanisms of transmission are vertical, accidental transmission, by blood transfusion, and organ transplantation [5][6] . Most of these insects are sylvatic and are associated with a broad variety of habitats and vertebrate hosts.…”

Section: Introductionmentioning

confidence: 99%

“…Most of these insects are sylvatic and are associated with a broad variety of habitats and vertebrate hosts. Some of them may be adapted to peridomestic and domestic habitats [5][6] .…”

Section: Introductionmentioning

confidence: 99%

“…Most of these insects are sylvatic and are associated with a broad variety of habitats and vertebrate hosts. Some of them may be adapted to peridomestic and domestic habitats [5][6] .The epidemiology of Chagas disease in the Amazon region is still being understood in a superficial and fragmental way. Despite the broad Amazon biodiversity, with the presence of diverse triatomines and many mammalian classes that may host T. cruzi, this region has been spared from the disease.…”

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confidence: 99%

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Study on Chagas disease occurrence in the municipality of Monte Negro, State of Rondônia, Brazilian Amazon

Carvalho

Rosa

Carvalho

et al. 2011

Rev. Soc. Bras. Med. Trop.

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Introduction: Studies on Chagas disease deal with the perspective of its occurrence in the Amazon region, which is directly correlated to the population growth and the spread of the bug biotope. The state of Rondônia has an immense source of vectors (Triatomine) and reservoirs of Trypanosoma cruzi. Environmental changes brought forth by the deforestation in the region may cause vector behavior changes and bring these vectors to a closer contact with humans, increasing the probability of vector infection. Methods: This study was carried out to check the occurrence of Chagas disease in the municipality of Monte Negro, Rondônia, Brazil, based on a random sampling of the farms and people wherein blood collection from the population and capturing triatomines were done. The blood samples were submitted to serologic tests to detect antibodies of the IgG class against T. cruzi. The triatomines that were collected had their digestive tract checked for the presence of trypanosomatidae with morphology resembling that of the T. cruzi. Results: The population examined was mostly from other states. From the 322 bugs examined on the microscope, 50% showed parasites with morphology compatible with T. cruzi. From the serology of 344 random samples of human blood, 1.2% was found positive, 6% showed inconclusive results, and 92.8% were negative. Conclusions: Monte Negro shows low prevalence of human infection by T. cruzi and none active vector transmission; however, preventive and surveying measures, which are not performed until now, shall be taken due to the abundance of vectors infected by trypanosomatidae. Keywords: Chagas disease. Amazon. Trypanosoma cruzi. Triatomines. RESUMO Introdução:Estudos anteriores sobre doença de Chagas tratam da perspectiva da ocorrência endêmica da parasitose na região Amazônica, que se correlaciona diretamente com o aumento populacional e a invasão do ecótopo pelos triatomíneos. O Estado de Rondônia possui um imenso manancial de vetores e reservatórios de Trypanosoma cruzi. As modificações ambientais ocasionadas pelo desmatamento na região podem gerar mudanças nos hábitos dos vetores, trazendo-os para um contato mais próximo do homem, aumentando as possibilidades de infecção vetorial. Métodos: Este estudo foi realizado para verificar a ocorrência da doença de Chagas em Monte Negro, Rondônia, equivalente à amostragem aleatória das propriedades rurais e de pessoas residentes no município, onde foram realizadas coletas sanguíneas dos moradores e coleta de triatomíneos. As amostras sanguíneas foram submetidas a testes sorológicos para detecção de anticorpos da classe IgG contra T. cruzi e os triatomíneos coletados foram analisados para verificar a presença de tripanosomatídeos em seu trato digestivo. Resultados: A população estudada, randomicamente selecionada, é em sua maioria advinda de outros estados. Dos 322 barbeiros avaliados microscopicamente, 50% apresentavam flagelados com morfologia compatível com Trypanosoma cruzi. A sorologia das 344 amostras de sangue humano coletadas randomicame...

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Patterns of antenal sensilla of Panstrongylus megistus from three Brazilian states

Cited by 14 publications

References 17 publications

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

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

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

Study on Chagas disease occurrence in the municipality of Monte Negro, State of Rondônia, Brazilian Amazon

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