Flight dispersal of the Chagas disease vectors Triatoma brasiliensis and Triatoma pseudomaculata in northeastern Brazil

Carbajal-de-la-Fuente, Ana Laura; Minoli, Sebastián; Lopes, Catarina Macedo; Noireau, François; Lazzari, Cláudio R.; Lorenzo, Marcelo G.

doi:10.1016/j.actatropica.2006.12.007

Cited by 63 publications

(56 citation statements)

References 13 publications

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“…Both field (Noireau & Dujardin 2001, zeledón et al 2001, Carbajal de la Fuente et al 2007) and laboratory studies (e.g., Minoli & Lazzari 2006) suggest that triatomine bugs make use of artificial light cues while actively dispersing; our results lend further support to this view by showing that forest triatomines can be routinely collected in light-traps in primary rainforest environments. electric light, a trait that is typical of human residences, may therefore play a key role also in household invasion by adult sylvatic triatomines.…”

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confidence: 80%

Attraction of Chagas disease vectors (Triatominae) to artificial light sources in the canopy of primary Amazon rainforest

Cutrim

Barrett

Santos

et al. 2010

Mem. Inst. Oswaldo Cruz

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Adult triatomines occasionally fly into artificially lit premises in Amazonia. This can result in Trypanosoma cruzi transmission to humans either by direct contact or via foodstuff contamination, but the frequency of such behaviour has not been quantified. To address this issue, a light-trap was set 45 m above ground in primary rainforest near Manaus, state of Amazonas, Brazil and operated monthly for three consecutive nights over the course of one year (432 trap-hours). The most commonly caught reduviids were triatomines, including 38 Panstrongylus geniculatus, nine Panstrongylus lignarius, three Panstrongylus rufotuberculatus, five Rhodnius robustus, two Rhodnius pictipes, one Rhodnius amazonicus and 17 Eratyrus mucronatus. Males were collected more frequently than females. The only month without any catches was May. Attraction of most of the known local T. cruzi vectors to artificial light sources is common and year-round in the Amazon rainforest, implying that they may often invade premises built near forest edges and thus become involved in disease transmission. Consequently, effective Chagas disease prevention in Amazonia will require integrating entomological surveillance with the currently used epidemiological surveillance

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supporting

confidence: 80%

Attraction of Chagas disease vectors (Triatominae) to artificial light sources in the canopy of primary Amazon rainforest

Cutrim

Barrett

Santos

et al. 2010

Mem. Inst. Oswaldo Cruz

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“…23 Active dispersal of adult T. brasiliensis from either cacti or rocky outcrops can also directly contribute to dwelling infestation and re-infestation in some areas. 12,13,24 In conclusion, the observations we report open the way to solving one long-standing question about T. brasiliensis s.s. ecology, namely, the origin of re-infesting vectors in areas without rocky outcrops. Future work will aim at confirming our present data with further sampling, at studying vectorhost-parasite interactions, and at assessing the genetic relationships of wild (from cacti, rocks, and timber piles), peridomestic and domestic populations of T. brasiliensis by using highresolution molecular markers.…”

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confidence: 58%

A Common Caatinga Cactus, Pilosocereus gounellei, is an Important Ecotope of Wild Triatoma brasiliensis Populations in the Jaguaribe Valley of Northeastern Brazil

Valença-Barbosa

Lima

Sarquis

et al. 2014

The American Society of Tropical Medicine and Hygiene

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Triatoma brasiliensis is the most important vector of Chagas disease in the Caatinga eco-region of northeastern Brazil. Wild T. brasiliensis populations have been reported only from rocky outcrops. However, this species frequently infests/re-infests houses in rock-free sedimentary lowlands. We therefore hypothesized that it should also occupy other natural ecotopes. We show that a common Caatinga cactus, Pilosocereus gounellei, locally known as xiquexique, often harbors T. brasiliensis breeding colonies apparently associated with rodents (n = 44 cacti, infestation rate = 47.7%, 157 bugs captured). Our findings suggest that infested cacti might be involved in house re-infestation by T. brasiliensis in the Caatinga region.

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“…However, Assis et al 28 suggest that the increasing presence of T. pseudomaculata in household environments is related to climate change, deforestation, and expansion of agricultural areas. Moreover, the known ability of dispersal by flight guided by artificial light of T. pseudomaculata and T. brasiliensis 29 favors the invasion of households in the northeastern region of Brazil.…”

Section: Discussionmentioning

confidence: 99%

Synanthropic triatomines (Hemiptera, Reduviidae) in the state of Pernambuco, Brazil: geographical distribution and natural Trypanosoma infection rates between 2006 and 2007

Silva

Barreto

Silva

et al. 2012

Rev. Soc. Bras. Med. Trop.

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INTRODUCTION: The present study shows a descriptive analysis of triatomine occurrence and its natural Trypanosoma infection rates in the state of Pernambuco, Brazil, between 2006 and 2007. METHODS: Entomological data for the species, such as specimens captured in both intra and peridomiciles and natural infection index, were obtained via domiciliary capture in 147 municipalities from 11 Regional Managements of Health. The database was obtained from a sample of insects (100% infected and 20% non-infected) sent to the Central Laboratory of Pernambuco. RESULTS: A total of 18,029 triatomines were analyzed from 138 municipalities of the state. Triatoma pseudomaculata (35%), Triatoma brasiliensis (34%), and Panstrongylus lutzi (25%) were the most captured species. These species also showed a widespread geographical distribution in the state. Panstrongylus megistus, Triatoma petrocchiae, Triatoma melanocephala, Triatoma sordida, Rhodnius nasutus, Rhodnius neglectus, and Triatoma infestans showed more limited geographical distribution and lower relative abundance. The parasitological research showed that 8.8% of the triatomines were naturally infected with flagellates morphologically similar to Trypanosoma cruzi and 91.3% of them were captured inside houses in 113 municipalities. P. lutzi showed the highest rates of natural infection. CONCLUSIONS: After the control of T. infestans, synanthropic species, such as T. brasiliensis, T. pseudomaculata, and P. lutzi, maintain the risk of T. cruzi transmission to humans in the state of Pernambuco. These species are widely distributed, and infected specimens have been found inside houses. Thus, an enhanced surveillance and vector control of Chagas disease is recommended in Pernambuco.

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Flight dispersal of the Chagas disease vectors Triatoma brasiliensis and Triatoma pseudomaculata in northeastern Brazil

Cited by 63 publications

References 13 publications

Attraction of Chagas disease vectors (Triatominae) to artificial light sources in the canopy of primary Amazon rainforest

Attraction of Chagas disease vectors (Triatominae) to artificial light sources in the canopy of primary Amazon rainforest

A Common Caatinga Cactus, Pilosocereus gounellei, is an Important Ecotope of Wild Triatoma brasiliensis Populations in the Jaguaribe Valley of Northeastern Brazil

Synanthropic triatomines (Hemiptera, Reduviidae) in the state of Pernambuco, Brazil: geographical distribution and natural Trypanosoma infection rates between 2006 and 2007

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