| Author | Pessoa, Grasielle Caldas D Ávila | pt_BR |
| Author | Trevizani, Nathália Abreu Borges | pt_BR |
| Author | Dias, Letícia Sena | pt_BR |
| Author | Bezerra, Claudia Mendonça de | pt_BR |
| Author | Melo, Bernardino Vaz de | pt_BR |
| Author | Diotaiuti, Liléia Gonçalves | pt_BR |
| Access date | 2016-06-16T16:59:14Z | pt_BR |
| Access date | 2016-07-08T02:09:53Z | |
| Available date | 2016-06-16T16:59:14Z | pt_BR |
| Available date | 2016-07-08T02:09:53Z | |
| Document date | 2015 | |
| Citation | PESSOA, Grasielle Caldas D'Ávila et al. Toxicological profile of deltamethrin in Triatoma brasiliensis (Hemiptera: Reduviidae) in State of Ceará; Northeastern Brazil. Revista da Sociedade Brasileira de Medicina Tropical, Uberaba, v. 48, n. 1, p. 39-43, 2015. | pt_BR |
| ISSN | 0037-8682 | pt_BR |
| URI | https://www.arca.fiocruz.br/handle/icict/14484 | |
| Language | eng | pt_BR |
| Publisher | Sociedade Brasileira de Medicina Tropical | pt_BR |
| Rights | open access | pt_BR |
| Title | Toxicological profile of deltamethrin in Triatoma brasiliensis (Hemiptera: Reduviidae) in State of Ceará; Northeastern Brazil | pt_BR |
| Type | Article | pt_BR |
| DOI | 10.1590/0037-8682-0010-2015 | pt_BR |
| Abstract | INTRODUCTION: Triatoma brasiliensis is the species of greatest epidemiological relevance in the semi-arid region of Brazil. This species is predominantly found in domestic environments, and it has the ability to build large colonies with high levels of natural infection via Trypanosoma cruzi. Thus, T. brasiliensis is one of the most efficient transmitters of Chagas disease (CD) to humans. Despite household spraying with residual insecticides, many areas report persistent reinfestations for reasons that remain poorly understood. Therefore, this study sought to characterize the toxicological profile of deltamethrin in T. brasiliensis from areas with persistent reinfestation in State of Ceará, Brazil.
METHODS: The susceptibility reference lineage (SRL) was derived from Umari. Serial dilutions of deltamethrin were prepared and applied to the dorsal abdomen of first 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 1xLD99 (0.851 nanograms of active ingredient per treated nymph) of the SRL.
RESULTS: The susceptibility profile characterization of the T. brasiliensis populations revealed 50% resistance ratios (RR50) that ranged from 0.32 to 1.21. The percentage of mortality in response to the diagnostic dose was 100%.
CONCLUSIONS: We demonstrated that T. brasiliensis was highly susceptible to deltamethrin. The control difficulties found might be related to the recolonization of the triatomines originating from neighboring environments and the possible operational failures related to the process of spraying that enabled specimens less susceptible to deltamethrin to survive. | pt_BR |
| Affilliation | Fundação Oswaldo Cruz. Centro de Pesquisas René Rachou. Laboratório de Triatomíneos e Epidemiologia da Doença de Chagas. Belo Horizonte, MG, Brasil. | pt_BR |
| Affilliation | Fundação Oswaldo Cruz. Centro de Pesquisas René Rachou. Laboratório de Triatomíneos e Epidemiologia da Doença de Chagas. Belo Horizonte, MG, Brasil. | pt_BR |
| Affilliation | Fundação Oswaldo Cruz. Centro de Pesquisas René Rachou. Laboratório de Triatomíneos e Epidemiologia da Doença de Chagas. Belo Horizonte, MG, Brasil. | pt_BR |
| Affilliation | Secretaria de Saúde do Estado do Ceará. Fortaleza, CE, Brasil. | pt_BR |
| Affilliation | Secretaria de Saúde do Estado de Minas Gerais. Belo Horizonte, MG, Brasil. | pt_BR |
| Affilliation | Fundação Oswaldo Cruz. Centro de Pesquisas René Rachou. Laboratório de Triatomíneos e Epidemiologia da Doença de Chagas. Belo Horizonte, MG, Brasil. | pt_BR |
| Subject | Triatominae | pt_BR |
| Subject | Triatoma brasiliensis | pt_BR |
| Subject | Insecticide resistance | pt_BR |
| Subject | Deltamethrin | pt_BR |
