Aspectos ecológicos da tripanossomíase americana: XVI - dispersão e ciclos anuais de colônias de Triatoma sordida e de Panstrongylus megistus espontaneamente desenvolvidas em ecótopos artificiais

Forattini, Oswaldo Paulo; Santos, Jair Lício Ferreira; Ferreira, Octávio Alves; Silva, Eduardo Olavo da Rocha e; Rabello, Ernesto Xavier

doi:10.1590/s0034-89101979000400005

Cited by 22 publications

(23 citation statements)

References 6 publications

(1 reference statement)

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“…Remarkably more elder nymphs and adults than younger instars were observed in the hen houses during the tests performed in January. This corresponds to observations of Forattini et al (1979) who reported a dispersal activity of T. sordida adults starting between March and April and a clear increase of first instar nymphs between July and August. The low number of individuals of all different stages tested in our study did not allow speculations about a stagedependent susceptibility of T. sordida to B. bassiana in the field.…”

Section: Discussionsupporting

confidence: 91%

Activity of oil-formulated Beauveria bassiana against Triatoma sordida in peridomestic areas in central Brazil

Luz¹,

Rocha²,

Nery³

et al. 2004

Mem. Inst. Oswaldo Cruz

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Section: Discussionsupporting

confidence: 91%

Activity of oil-formulated Beauveria bassiana against Triatoma sordida in peridomestic areas in central Brazil

Luz¹,

Rocha²,

Nery³

et al. 2004

Mem. Inst. Oswaldo Cruz

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“…Em se considerando os dados globais obtidos nos GE extradomiciliares b 3 , c 1 , c 3 , d 3 (Tabelas 1 e 3), pode-se observar as flutuações no desenvolvimento das formas adultas. Calculando-se as proporções de adultos encontrados em cada exame, em relação aos representantes dos demais estádios, obtevese o gráfico constante da Figura 1, onde se apresenta destaque para as fêmeas.…”

Section: Resultsunclassified

“…Tais informações permitem sua utilização nas atividades de vigilância epidemiológica. 3 . Para a avaliação dos estádios e da sobrevivência, continuou-se a adotar a técnica de Kiritani e Nakasujii modificada por Manly 7 (1976) e relatada, para sua aplicação às colônias desenvolvidas nos GE, em trabalhos anteriores (Forattini e col. 1,3 1977, 1979).…”

Section: Introductionunclassified

Aspectos ecológicos da tripanossomíase americana: XX - Desenvolvimento e ciclos anuais de colônias de Panstrongylus megistus em ecótopos artificiais, no ambiente peri e extradomiciliar

Forattini

Ferreira²,

Rabello

et al. 1984

Rev. Saúde Pública

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RESUMO: Em colônias de Panstrongylus megistus, espontaneamente desenvolvidas em galinheiros experimentais, pôde-se observar as condições de desenvolvimento, variação e permanência de seus componentes. Foram obtidos também dados sobre os ciclos anuais e a sobrevivência, O aspecto cíclico caracterizou-se pela maior produção de formas adultas no último trimestre do ano, ocasião que coincide com o encontro dessa espécie no ambiente domiciliar. Face a tais achados, considera-se que o período de produção de adultos representa a fase "infestante" para o ambiente domiciliar "suscetível", este representado pelas áreas tratadas, ou seja, as previamente submetidas ao expurgo. Nesse período, ocorre o risco da reinfestação e subseqüente domiciliação desse triatomíneo, a partir do ambiente extradomiciliar. Tais informações permitem sua utilização nas atividades de vigilância epidemiológica. UNITERMOS:

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“…Some studies show that zones of higher occurrence of T. sordida correspond to those of higher and older farm exploration 33 , which may justify the higher frequency of this species in Planaltina.…”

Section: Discussionmentioning

confidence: 99%

“…Knox et al 32 also reported the presence of P. megistus in DF in areas with intense anthropic pressure, but with remnants of native vegetation still left in ecological parks and gallery forests close to residences. The development of colonies of P. megistus occurs in humid environments 23,33 , and it is possible that gallery forests may be the natural habitat of populations of this species. With the disorganized growth of administrative regions many domiciles are found close to these areas, and this may favor dispersal by flight and domiciliary invasion of these triatomines, stimulated by environmental changes such as reduction of food sources in the wild environment, presence of food sources in peridomicile, and/or rising temperature 23,[33][34][35][36][37][38] .…”

Section: Discussionmentioning

confidence: 99%

Occurrence of synanthropic triatomines (Hemiptera: Reduviidae) in the Federal District of Brazil

Maeda

Knox

Gurgel-Gonçalves

2012

Rev. Soc. Bras. Med. Trop.

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This retrospective analysis considered the number of adults and nymphs of each species collected and infected in both intradomicile and peridomicile. Results: A total of 754 triatomines were collected in 252 reported domiciles. Panstrongylus megistus was the most frequent species (65%), followed by T. pseudomaculata (14%). Of the 309 examined insects, only 3 (1%) specimens of P. megistus were infected with flagellates morphologically similar to Trypanosoma cruzi. The spatial occurrence indicated a higher diversity of triatomines and frequency of T. sordida in rural areas. Moreover, there was a predominance of P. megistus in urban areas. The number of records of P. megistus in the rainy season was two times higher than that during the dry season. The largest number of triatomines was collected in November. Conclusions: The presence of P. megistus specimens infected with trypanosomes in domiciles, shows the potential risk of human infection in DF. Thus, it is essential to continue entomological surveillance, intensifying it in the rainy season and in regions of greater occurrence. Keywords: Chagas disease control. Entomological surveillance. Synanthropic triatomines. Federal District. Brazil. triatomines. Furthermore, the invasion and/or colonization of infected triatomines from wild ecotopes may represent the risk of vectorial transmission with the installation of peridomiciliary and domiciliary cycles of T. cruzi 6,7 . In this context, the objective of this paper is to analyze the spatial and temporal occurrence of triatomine species collected in DF, as well as their indices of natural infection with trypanosomes to direct actions of entomological surveillance of Chagas disease coordinated by SES-DF. RESUMO 72 METHODS RESULTS Maeda MH et al -Occurrence of triatomines in DF Study areaThe Federal District of Brazil is geographically located between the parallels 15º30' and 16º03' south latitude, and between meridians 47°25' and 48°12' west longitude, in Central Brazil, one of the highest areas of the region, the Central Plateau. According to 2010 Census results, the population comprises 2,563,963 people in an area of 5,787,784km 2 divided into 30 administrative regions 8 . The area is filled with plateaus over 1,000m in altitude. The average annual rainfall is around 1,600mm, and the average annual temperature ranges between 18°C and 20°C with two distinct seasons, the dry season from May to September and the rainy season from October to April, the latter season with the highest temperature records 9 . Triatomine collection and natural infectionThe insects were collected in intradomiciliary and peridomiciliary environments by residents and then taken to the PITs. Each PIT receives a kit with materials for insect storage, a notepad to keep notes containing the address and location of collection, and tweezers for the handling of specimens.After notification, the SES-DF public health agents did active searches in these houses and their annexes. The materials used for triatomine collection were metal tweezers and fl...

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Aspectos ecológicos da tripanossomíase americana: XVI - dispersão e ciclos anuais de colônias de Triatoma sordida e de Panstrongylus megistus espontaneamente desenvolvidas em ecótopos artificiais

Cited by 22 publications

References 6 publications

Activity of oil-formulated Beauveria bassiana against Triatoma sordida in peridomestic areas in central Brazil

Activity of oil-formulated Beauveria bassiana against Triatoma sordida in peridomestic areas in central Brazil

Aspectos ecológicos da tripanossomíase americana: XX - Desenvolvimento e ciclos anuais de colônias de Panstrongylus megistus em ecótopos artificiais, no ambiente peri e extradomiciliar

Occurrence of synanthropic triatomines (Hemiptera: Reduviidae) in the Federal District of Brazil

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