Alternativas de controle do Triatoma sórdida no Triângulo Mineiro. I. Borrifação parcial (intradomicílio) no Município de Douradoquara, MG, Brasil

Diotaiuti, Liléia; Carneiro, Mariângela; Loiola, Carlos Catão P.; Neto, Horacio V. Silveira; Coutinho, Rosana Mourão; Dias, João Carlos Pinto

doi:10.1590/s0037-86821988000400008

Cited by 6 publications

(5 citation statements)

References 6 publications

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“…While T. infestans was not detected in any of the sites, specimens of T. sordida, P. megistus, and R. neglectus were found. Diotaiuti et al (18) reported similar findings for artificial ecotopes in Triângulo Mineiro, Minas Gerais, Brazil.…”

Section: Discussionmentioning

confidence: 55%

Secondary triatomine species in dwellings and other nearby structures in municipalities under epidemiological surveillance in the state of Paraná, Brazil

Falavigna-Guilherme¹,

Pavanelli²,

Silva³

et al. 2001

Rev Panam Salud Publica

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Objective. Since data are scarce regarding secondary triatomine species in the Brazilian state of Paraná, this study investigated infestations in inhabited and abandoned houses and in various other (19/62, or 30.6%), followed by chicken coops (24/350, or 6.9%). The primary food source of the triatomines was the blood of birds. Nevertheless, in the municipality with the highest density of triatomines, the food sources included domestic animals and even humans. We found that 13.4% of the T. sordida and 13.5% of the P. megistus were infected with Trypanosoma cruzi. Conclusions. These results demonstrate the need to maintain entomological surveillance measures in the studied areas. This is especially important since Brazil and other countries of Latin America have affirmed the need to interrupt the vector-borne transmission of Chagas' disease.Triatominae, Chagas' disease, Brazil, epidemiological surveillance. ABSTRACTIn 1983

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Section: Discussionmentioning

confidence: 55%

Secondary triatomine species in dwellings and other nearby structures in municipalities under epidemiological surveillance in the state of Paraná, Brazil

Falavigna-Guilherme¹,

Pavanelli²,

Silva³

et al. 2001

Rev Panam Salud Publica

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“…Pressure continues from insecticides used for multiple purposes (agricultural, domestic), even overlapping with control programs for other vectors. The northern region of Minas Gerais, where the populations studied were collected, was subjected to intense environmental changes in the 1970s to implement cotton cultivation, supporting the possibility of signifi cant insecticide pressure from agriculture 19 .…”

Section: Discussionmentioning

confidence: 99%

“…Spraying the peridomicile is exhausting work in which unstacking all of the material accrued is operationally impossible for the fi eld agent in charge. After insecticide application, eggs and nymphs could remain nearly free of contact with active chemicals and/or could be in contact with sublethal doses, thus selecting for the specimens less susceptible to the chemicals and allowing for the survival of those insects in such ecotopes 19,20 .…”

Section: Discussionmentioning

confidence: 99%

Deltamethrin pyrethroid susceptibility characterization of Triatoma sordida Stål, 1859 (Hemiptera: Reduviidae) populations in the Northern Region of Minas Gerais, Brazil

Pessoa

Dias

Diotaiuti

2014

Rev. Soc. Bras. Med. Trop.

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Introduction:Triatoma sordida is the most captured Triatomine species in the Brazilian artifi cial environment. In 2008, the discovery of three Triatomine populations with altered susceptibilities to deltamethrin highlighted the importance of investigating the genetic potential for resistance in triatomines. The purpose of this study was to characterize the susceptibility to deltamethrin of peridomestic T. sordida populations in Minas Gerais, Brazil. Methods: A susceptibility reference lineage derived from Uberaba, Minas Gerais, Brazil was used. Serial dilutions of deltamethrin were prepared and applied to the dorsal abdomen of fi rst instar nymphs. The control group received only pure acetone. Mortality was evaluated after 72h. Qualitative tests assessed mortality in response to a diagnostic dose of 1xLD 99 of the susceptibility reference lineage. Results: Susceptibility profi le characterization of T. sordida populations revealed resistance ratios (RR 50 s) ranging from 0.42 to 3.94. The percentage mortality in response to the diagnostic dose varied from 70% to 100%. A comparison of the results obtained in the quantitative and qualitative assays demonstrated a lack of correspondence for some populations. Conclusions: We demonstrated that only T. sordida populations that present a RR 50 >1.0 have altered susceptibility, and the execution of simultaneous fi eld and laboratory tests is required to understand the actual effect of vector control. A possible cause of the observed resistance ratios might be the continuous use of pyrethroids in Brazil since the 1980s.

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“…Pigsties, chicken runs and barns were considered to be the main outbuildings colonised by triatomines in the City of Douradoquara, State of Minas Gerais, according to Diotaiuti et al 25 . Service 26 argued that the maintenance of corrals around houses provides an adequate habitat for Chagas disease vector populations.…”

Section: Discussionmentioning

confidence: 99%

Triatomines in dwellings and outbuildings in an endemic area of Chagas disease in northeastern Brazil

Lima

Jeraldo

Silveira

et al. 2012

Rev. Soc. Bras. Med. Trop.

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Introduction:The present study identified the triatomines collected in intra and peri-domestic environments, observed the occurrence of Trypanosoma cruzi infection in triatomines and correlated this information with housing conditions and the fauna associated with the rural areas of the City of Itabaianinha, located in the State of Sergipe, Brazil. Methods: Quarterly visits were conducted between March 2009 and March 2010, and the homes to be visited for the active search of insects were determined by random selection. In each housing unit, the insects were collected by a manual search with a metal clip and flashlight to inspect openings and cavities, with a collection time of one hour/home/individual. The Pirisa® dislodge chemical was used to force the insects to leave their ecotopes. Analysis of the intestinal contents of triatomines was performed in the laboratory to establish the presence of Trypanosomatidae. Results: Of the 103 dwellings surveyed, 17.5% were infested with Panstrongylus megistus. The village of Mutuca exhibited the highest infestation rate (38.1%). All the villages with relevant infestation rates were situated in the northern area of the city. The highest percentage of vector infection was found in the village of Água Boa (56.5%). The rural dwellings were found to be primarily brick or wooden house with or without roughcast or plastered walls, and the outbuilding most frequently associated with triatomines was the chicken run. Conclusions: These results emphasise the need for broader vector control and surveillance and for educational campaigns in the context of the Chagas Disease Control Program.

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Alternativas de controle do Triatoma sórdida no Triângulo Mineiro. I. Borrifação parcial (intradomicílio) no Município de Douradoquara, MG, Brasil

Cited by 6 publications

References 6 publications

Secondary triatomine species in dwellings and other nearby structures in municipalities under epidemiological surveillance in the state of Paraná, Brazil

Secondary triatomine species in dwellings and other nearby structures in municipalities under epidemiological surveillance in the state of Paraná, Brazil

Deltamethrin pyrethroid susceptibility characterization of Triatoma sordida Stål, 1859 (Hemiptera: Reduviidae) populations in the Northern Region of Minas Gerais, Brazil

Triatomines in dwellings and outbuildings in an endemic area of Chagas disease in northeastern Brazil

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