Avaliação do Programa de Controle da Doença de Chagas em relação à presença de Panstrongylus megistus na região centro-oeste do Estado de Minas Gerais, Brasil

Villela, Marcos Marreiro; Souza, Janice Maria Borba de; Melo, Vicente de Paula; Dias, João Carlos Pinto

doi:10.1590/s0102-311x2009000400022

Cited by 36 publications

(36 citation statements)

References 30 publications

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“…The area under study will continue to be monitored in the coming years as a maintenance strategy of municipal and community interest to determine the importance of preventing triatomines and CD in these places. As observed in other studies, after evaluation of surveillance activities, the population and local professional interest tends to rise, as reflected by a greater number of triatomine notifications in the years following the research (26) (27) .…”

Section: Discussionsupporting

confidence: 65%

Assessment of the Housing Improvement Program for Chagas Disease Control in the Northwestern municipalities of Rio Grande do Sul, Brazil

Santos

Bedin

Wilhelms

et al. 2016

Rev. Soc. Bras. Med. Trop.

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Introduction:The Housing Improvement Program for Chagas Disease Control (HIPCDC) was established in 2001 in Northwestern Rio Grande do Sul State, aiming to improve the conditions of the domiciliary and peridomiciliary environments to make them resistant to triatomine colonization. This study aimed to assess the impact of the HIPCDC on triatomine control by developing local population and authority awareness on the issue. Methods: The study was conducted by means of questionnaires applied to local authorities and the program beneficiaries. Three municipalities -Ajuricaba, Coronel Barros, and Crissiumal -were visited. Results: A program coordinator from each municipality and 62 individuals from selected households were interviewed. The authorities reported difficulties in the implementation of the program due to differences between the project development period and financial resource availability, in addition to a lack of understanding by the community not included in the program. As for the houses, most improvements were made in the peridomiciliary environments; moreover, construction of 4 new residences, as well as the renovation of others, was also reported. Regarding suggestions to the program, requests for better planning (44.9%) and renovation quality (36.7%) were highlighted. With reference to the presence of triatomine bugs, prior to the HIPCDC adaptations, 12.9% of the respondents reported coming across at least one specimen at home, as compared to 22.6% who found these insects in peridomiciliary areas. Conclusions: Despite reports of difficulties in carrying out the HIPCDC, there was an improvement in the housing conditions, with no triatomine occurrence reports after the program implementation.

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Section: Discussionsupporting

confidence: 65%

Assessment of the Housing Improvement Program for Chagas Disease Control in the Northwestern municipalities of Rio Grande do Sul, Brazil

Santos

Bedin

Wilhelms

et al. 2016

Rev. Soc. Bras. Med. Trop.

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“…Therefore, notifications from PITs are, in general, intradomiciliaries 35 . Peridomiciliary captures occurred mainly after the research of public health agents in households, as observed by Villela et al 17 . Because secondary data were used, a lot of information, such as sampling location, species, and location (address), was lost due to incorrect completion of forms.…”

Section: Conflict Of Interest Financial Support Referencesmentioning

confidence: 87%

“…In spite of the low indices for natural infection with trypanosomes for this species in DF, compared with studies in different regions of Brazil [12][13][14][15][16][17] , it is important to stress that some of the triatomines were found colonizing intradomicile and feeding on human blood according to precipitin tests (unpublished data), thus evidencing the risk of human infection. Our results also show that the spatial occurrence of triatomine species is different in the 20 administrative regions studied in DF, with the highest number of records and species richness observed in Planaltina, a predominantly rural region with the highest frequency of T. sordida.…”

Section: Discussionmentioning

confidence: 99%

“…In the south of Brazil it occurs mainly in wild ecotopes 16,22 , unlike in the southeast and northeast regions where P. megistus has greater epidemiological importance for occupying artificial ecotopes 15,17,[23][24][25] . Specimens of P. megistus prefer tree hollows in arboreal habitats 26,27 , and they feed on marsupials (Didelphis spp.…”

Section: Discussionmentioning

confidence: 99%

“…A study on T. cruzi reservoirs in DF showed that specimens of D. albiventris are responsible for maintaining enzootic circulation of the parasite in the region, where 33% of these mammals were infected 5 . However, P. megistus has varied feeding habits, also feeding on birds, dogs, cats, rodents, cattle, goats, pigs, and humans 17,27,30 . Compared with other species such as T. sordida, P. megistus presents higher preferences for human blood, increasing the risk of transmission of T. cruzi by this vector 30 .…”

Section: Discussionmentioning

confidence: 99%

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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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Assessing the vulnerability of Brazilian municipalities to the vectorial transmission of Trypanosoma cruzi using multi-criteria decision analysis

et al. 2014

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Despite the dramatic reduction in Trypanosoma cruzi vectorial transmission in Brazil, acute cases of Chagas disease (CD) continue to be recorded. The identification of areas with greater vulnerability to the occurrence of vector-borne CD is essential to prevention, control, and surveillance activities. In the current study, data on the occurrence of domiciliated triatomines in Brazil (non-Amazonian regions) between 2007 and 2011 were analyzed. Municipalities' vulnerability was assessed based on socioeconomic, demographic, entomological, and environmental indicators using multi-criteria decision analysis (MCDA). Overall, 2275 municipalities were positive for at least one of the six triatomine species analyzed (Panstrongylus megistus, Triatoma infestans, Triatoma brasiliensis, Triatoma pseudomaculata, Triatoma rubrovaria, and Triatoma sordida). The municipalities that were most vulnerable to vector-borne CD were mainly in the northeast region and exhibited a higher occurrence of domiciliated triatomines, lower socioeconomic levels, and more extensive anthropized areas. Most of the 39 new vector-borne CD cases confirmed between 2001 and 2012 in non-Amazonian regions occurred within the more vulnerable municipalities. Thus, MCDA can help to identify the states and municipalities that are most vulnerable to the transmission of T. cruzi by domiciliated triatomines, which is critical for directing adequate surveillance, prevention, and control activities. The methodological approach and results presented here can be used to enhance CD surveillance in Brazil.

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Avaliação do Programa de Controle da Doença de Chagas em relação à presença de Panstrongylus megistus na região centro-oeste do Estado de Minas Gerais, Brasil

Abstract: The Brazilian National Chagas Disease Control Program (PCDCh)

Cited by 36 publications

References 30 publications

Assessment of the Housing Improvement Program for Chagas Disease Control in the Northwestern municipalities of Rio Grande do Sul, Brazil

Assessment of the Housing Improvement Program for Chagas Disease Control in the Northwestern municipalities of Rio Grande do Sul, Brazil

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

Assessing the vulnerability of Brazilian municipalities to the vectorial transmission of Trypanosoma cruzi using multi-criteria decision analysis

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