scholarly journals Insecticide resistance, fitness and susceptibility to Zika infection of an interbred Aedes aegypti population from Rio de Janeiro, Brazil

2020 ◽  
Vol 13 (1) ◽  
Author(s):  
Carlucio Rocha dos Santos ◽  
Cynara de Melo Rodovalho ◽  
Willy Jablonka ◽  
Ademir Jesus Martins ◽  
José Bento Pereira Lima ◽  
...  
Keyword(s):  
Aedes Aegypti ◽  
Insecticide Resistance ◽  
Rio De Janeiro ◽  
Aegypti Population

scholarly journals Insecticide resistance and genetic structure of Aedes aegypti populations from Rio de Janeiro State, Brazil

2021 ◽  
Vol 15 (2) ◽  
pp. e0008492 ◽  
Author(s):  
Rafi Ur Rahman ◽  
Luciano Veiga Cosme ◽  
Monique Melo Costa ◽  
Luana Carrara ◽  
José Bento Pereira Lima ◽  
...  
Keyword(s):  
Gene Flow ◽  
Genetic Structure ◽  
Aedes Aegypti ◽  
Insecticide Resistance ◽  
Vector Control ◽  
Rio De Janeiro ◽  
Control Program ◽  
Positive Control ◽  
World Health ◽  
Janeiro State

Vector control largely relies on neurotoxic chemicals, and insecticide resistance (IR) directly threatens their effectiveness. In some cases, specific alleles cause IR, and knowledge of the genetic diversity and gene flow among mosquito populations is crucial to track their arrival, rise, and spread. Here we evaluated Aedes aegypti populations’ susceptibility status, collected in 2016 from six different municipalities of Rio de Janeiro state (RJ), to temephos, pyriproxyfen, malathion, and deltamethrin. We collected eggs of Ae. aegypti in Campos dos Goytacazes (Cgy), Itaperuna (Ipn), Iguaba Grande (Igg), Itaboraí (Ibr), Mangaratiba (Mgr), and Vassouras (Vsr). We followed the World Health Organization (WHO) guidelines and investigated the degree of susceptibility/resistance of mosquitoes to these insecticides. We used the Rockefeller strain as a susceptible positive control. We genotyped the V1016I and F1534C knockdown resistance (kdr) alleles using qPCR TaqMan SNP genotyping assay. Besides, with the use of Ae. aegypti SNP-chip, we performed genomic population analyses by genotyping more than 15,000 biallelic SNPs in mosquitoes from each population. We added previous data from populations from other countries to evaluate the ancestry of RJ populations. All RJ Ae. aegypti populations were susceptible to pyriproxyfen and malathion and highly resistant to deltamethrin. The resistance ratios for temephos was below 3,0 in Cgy, Ibr, and Igg populations, representing the lowest rates since IR monitoring started in this Brazilian region. We found the kdr alleles in high frequencies in all populations, partially justifying the observed resistance to pyrethroid. Population genetics analysis showed that Ae. aegypti revealed potential higher migration among some RJ localities and low genetic structure for most of them. Future population genetic studies, together with IR data in Ae aegypti on a broader scale, can help us predict the gene flow within and among the Brazilian States, allowing us to track the dynamics of arrival and changes in the frequency of IR alleles, and providing critical information to improving vector control program.

scholarly journals Restoration of pyrethroid susceptibility in a highly resistant Aedes aegypti population

2018 ◽  
Vol 14 (6) ◽  
pp. 20180022 ◽  
Author(s):  
Marissa K. Grossman ◽  
Valentin Uc-Puc ◽  
Julian Rodriguez ◽  
David J. Cutler ◽  
Levi T. Morran ◽  
...  
Keyword(s):  
Aedes Aegypti ◽  
Insecticide Resistance ◽  
Disease Vectors ◽  
Control Methods ◽  
Insecticide Susceptibility ◽  
Aegypti Population ◽  
Phenotypic Susceptibility

Insecticide resistance has evolved in disease vectors worldwide, creating the urgent need to either develop new control methods or restore insecticide susceptibility to regain use of existing tools. Here we show that phenotypic susceptibility can be restored in a highly resistant field-derived strain of Aedes aegypti in only 10 generations through rearing them in the absence of insecticide.

Characterisation of the Breeding Sites and Insecticide Resistance of Aedes aegypti Population in the City of Bobo-Dioulaso, Burkina Faso

2020 ◽  
Vol 28 (1) ◽  
pp. 142
Author(s):  
M. Namountougou ◽  
D.D. Soma ◽  
D.A. Kaboré ◽  
S. N'do ◽  
M. Kientega ◽  
...  
Keyword(s):  
Aedes Aegypti ◽  
Insecticide Resistance ◽  
Burkina Faso ◽  
Breeding Sites ◽  
The City ◽  
Aegypti Population

scholarly journals Effects of piperonyl butoxide on the toxicity of the organophosphate temephos and the role of esterases in the insecticide resistance of Aedes aegypti

2014 ◽  
Vol 47 (5) ◽  
pp. 579-582 ◽  
Author(s):  
Boscolli Barbosa Pereira ◽  
Jean Ezequiel Limongi ◽  
Edimar Olegário de Campos Júnior ◽  
Denis Prudencio Luiz ◽  
Warwick Estevam Kerr
Keyword(s):  
Aedes Aegypti ◽  
Insecticide Resistance ◽  
Piperonyl Butoxide

scholarly journals Incidência das Formas Imaturas de Aedes albopictus (Skuse) e Aedes aegypti (Linnaeus) no Município de Miguel Pereira, RJ, Brasil

2010 ◽  
Vol 3 (2) ◽  
pp. 55-58 ◽  
Author(s):  
Paulo Roberto Moreira Barbosa ◽  
William Costa Rodrigues ◽  
Marise Maleck de Oliveira Cabral
Keyword(s):  
Aedes Aegypti ◽  
Aedes Albopictus ◽  
Urban Areas ◽  
Rio De Janeiro ◽  
Average Rate ◽  
Public Health Problem ◽  
Waste Land ◽  
Immature Form ◽  
Relationship Of ◽  
Janeiro State

A presença de Aedes albopictus (Skuse) em área urbana representa um risco potencial do inter-relacionamento dessa espécie de mosquito com a população. Este estudo teve como objetivo identificar as formas imaturas de Ae. albopictus encontradas nos depósitos e imóveis do município de Miguel Pereira. O estudo foi realizado no período de 12 meses, ano de 2007, em 27 locais do município de Miguel Pereira, Estado do Rio de Janeiro. As larvas encontradas foram identificadas em laboratório e a análise dos dados foi calculada pelos índices de infestação predial e índice de Breteau. Os tipos de imóveis positivos foram residências (79,44% do total); terrenos baldios (2,56%); comércios (2,56%) e outros tipos de imóveis (15,04%) para Ae. albopictus, e residências (72,72% do total); comércios (6,06%); terrenos baldios (3,03%); e outros tipos de imóveis (18,18%) para Aedes aegypti (L.). Das 3731 larvas, 3562 (95,5%) eram de Ae. albopictus e 169 (4,5%) de Ae. aegypti. O mosquito Ae. albopictus mostrou-se mais presente nos criadouros que Ae. aegypti. A média do índice de infestação predial (IFP) e índice de Breteau (IB) para Ae. albopictus foi 1,0 e 1,9 e para Ae. aegypti de 0,1 e 0,1, respectivamente. As formas imaturas mais abundantemente encontradas no Município de Miguel Pereira no ano de 2007 foram de Ae. albopictus podendo futuramente se tornar um problema de saúde pública. Incidence of Aedes albopictus (Skuse) Immature Form in Miguel Pereira, RJ, Brazil. Abstract. The presence of Aedes albopictus (Skuse) in urban areas represents a potential risk of inter-relationship of this species of mosquito with the population. This study aimed to evaluate the presence of the Ae. albopictus immature forms in deposits and building at Miguel Pereira city, Rio de Janeiro State. The study was carried in the last 12 months, 2007, in 27 locations in Miguel Pereira city. The larvae were identified in laboratory and data analysis was calculated by indicators of building infestation index and the Breteau index. The positive buildings were: residential (79.44% of total); waste land (2.56%), shopping (2.56%) and other types of buildings (15.04%) to Ae. albopictus, and homes (72.72% of total), shopping (6.06%); waste land (3.03%) and other types of buildings (18.18%) to Ae. aegypti (L.). The larvae (3731) collected, 3562 (95.5%) were Ae. albopictus and 169 (4.5%) were Ae. aegypti. The Ae. albopictus are more present in breeding that Ae. aegypti. The average rate of building infestation index (IFP) and Breteau index (IB) for Ae. albopictus was 1.0 and 1.9 and for Ae. aegypti was 0.1 and 0.1, respectively. The Ae. albopictus immature larvae forms were more abundantly found in the Miguel Pereira city in 2007; in future it may become a public health problem.

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