Toxicological profile of deltamethrin in Triatoma brasiliensis (Hemiptera: Reduviidae) in State of Ceará, Northeastern Brazil
Rev. Soc. Bras. Med. Trop
; 48(1): 39-43, jan-feb/2015. tab
Article
in English
| LILACS
| ID: lil-742971
Responsible library:
BR1.1
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. .
Full text:
Available
Collection:
International databases
Health context:
Sustainable Health Agenda for the Americas
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SDG3 - Health and Well-Being
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Neglected Diseases
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SDG3 - Target 3.3 End transmission of communicable diseases
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SDG3 - Target 3.4 Reduce premature mortality due to noncommunicable diseases
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SDG3 - Target 3.2 Reduce avoidable death in newborns and children under 5
Health problem:
Goal 1 Equitable access to health services
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Target 3.8 Achieve universal access to health
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Target 3.2: Reduce avoidable death in newborns and children under 5
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Chagas Disease
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Chagas Disease
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Cardiovascular Disease
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Endocrine System Diseases
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Environmental Health
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Neonatal Healthcare
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Noncommunicable Diseases
Database:
LILACS
Main subject:
Social Class
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Cardiovascular Diseases
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Metabolic Syndrome
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Health Status Disparities
Type of study:
Etiology study
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Incidence study
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Observational study
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Prognostic study
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Qualitative research
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Risk factors
Aspects:
Social determinants of health
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Equity and inequality
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Patient-preference
Limits:
Adult
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Aged
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Child
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Female
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Humans
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Male
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Infant, Newborn
Country/Region as subject:
South America
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Brazil
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Europa
Language:
English
Journal:
Rev. Soc. Bras. Med. Trop
Journal subject:
Tropical Medicine
Year:
2015
Document type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
Fundação Oswaldo Cruz/BR