Fontes alimentares de Triatoma pseudomaculata no Estado do Ceará, Brasil

Freitas, Simone Patrícia Carneiro; Lorosa, Elias Seixas; Rodrigues, Daniele Cristine; Freitas, Assilon Lindoval Carneiro; Gonçalves, Teresa Cristina Monte

doi:10.1590/s0034-89102005000100004

Cited by 29 publications

(12 citation statements)

References 11 publications

(4 reference statements)

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“…Despite being refractory to Trypanosoma cruzi, these domestic fowl have already been reported as responsible for maintaining triatomine colonies in peridomestic environments, serving as a food source and affording the emergence of abundant populations of these vectors in proximity to humans. 4,13,14 In this study, the finding of human DNA in a Triatoma brasiliensis fifth nymph instar specimen captured inside a house is worrisome, indicating resident bugs feeding on humans. Valença-Barbosa and others 15 highlighted that bug numbers based on capture are rather underestimated.…”

mentioning

confidence: 65%

“…The high prevalence of goats as a food source in several kinds of ecotopes might be explained by the high mobility of these animals to graze, which was already mentioned, 5,11 with evidences of triatomine blood meals based on field observation and serological tests (precipitin 4 and ELISA…”

Section: Introductionmentioning

confidence: 94%

“…3 Early approaches to explore the triatomine dietary habits have been based on immunological tests such as precipitin 4 and enzyme-linked immunosorbent assay (ELISA). 5 However, these techniques have been limited due to the low quantity and the degradation of the blood in the vector gut.…”

Section: Introductionmentioning

confidence: 99%

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Molecular Identification of Food Sources in Triatomines in the Brazilian Northeast: Roles of Goats and Rodents in Chagas Disease Epidemiology

Valença-Barbosa¹,

Fernandes²,

Santos³

et al. 2015

The American Society of Tropical Medicine and Hygiene

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Abstract. We used the gut contents of triatomines collected from rural areas of Ceará State, northeastern Brazil, to identify their putative hosts via vertebrate cytb gene sequencing. Successful direct sequencing was obtained for 48% of insects, comprising 50 Triatoma brasiliensis, 7 Triatoma pseudomaculata, and 1 Rhodnius nasutus. Basic local alignment search tool (BLAST) procedure revealed that domestic animals, such as chickens (Gallus gallus) and goats (Capra hircus), are the main food source, including in sylvatic environment. Native hosts were also detected in peridomestic environment such as reptiles (Tropidurus sp. and Iguana iguana) and the Galea spixii (Rodentia: Caviidae). The role of goats and Galea spixii in Chagas disease epidemiology calls for further studies, because these mammals likely link the sylvatic and domestic Trypanosoma cruzi cycles.

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mentioning

confidence: 65%

Section: Introductionmentioning

confidence: 94%

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Molecular Identification of Food Sources in Triatomines in the Brazilian Northeast: Roles of Goats and Rodents in Chagas Disease Epidemiology

Valença-Barbosa¹,

Fernandes²,

Santos³

et al. 2015

The American Society of Tropical Medicine and Hygiene

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“…Triatoma pseudomaculata has been found associated with cockroaches inside chicken-coops (Freitas et al 2005), and precipitin tests confirmed the presence of cockroach hemolymph in the intestinal contents of some of the sampled insects. Our work tested whether T. pseudomaculata presents behavioral traits indicative of arthropod feeding.…”

Section: Triatoma Pseudomaculata Corrêa and Espínola Is A Hematophagousmentioning

confidence: 84%

Behavioral evidence of an ectoparasitic interaction between Triatoma pseudomaculata Corrêa e Espínola (Heteroptera: Reduviidae) and Periplaneta americana (L.) (Blattodea: Blattidae)

2011

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The present work tested whether Triatoma pseudomaculata Corrêa & Espínola shows behavioral traits indicating that it is capable of feeding on arthropods. We consistently observed nymphs extending their proboscis in the direction of cockroaches and attempting to bite. Insects presented a preference for biting specific cockroach body parts. Our results suggest that arthropod hemolymph represents an alternative source of food that increases the survival of T. pseudomaculata individuals undergoing long starvation.

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“…This species was often found in domiciles in Planaltina and Paranoá, and in some of these domiciles nymphs were collected, indicating colonization. Even though T. pseudomaculata is more frequent in peridomicile and usually feeds on birds, the colonization in domiciles has been observed in Sobral, Ceará, and Berilo, Minas Gerais, suggesting adaptation of this species in this environment 25,43 . In the northeast of Brazil T. pseudomaculata has great importance for epidemiological surveillance of Chagas disease, its being the most frequent species after T. brasiliensis 15,42 .…”

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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Fontes alimentares de Triatoma pseudomaculata no Estado do Ceará, Brasil

Cited by 29 publications

References 11 publications

Molecular Identification of Food Sources in Triatomines in the Brazilian Northeast: Roles of Goats and Rodents in Chagas Disease Epidemiology

Molecular Identification of Food Sources in Triatomines in the Brazilian Northeast: Roles of Goats and Rodents in Chagas Disease Epidemiology

Behavioral evidence of an ectoparasitic interaction between Triatoma pseudomaculata Corrêa e Espínola (Heteroptera: Reduviidae) and Periplaneta americana (L.) (Blattodea: Blattidae)

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

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