Larval Susceptibility of Two Culex quinquefasciatus Populations (Diptera: Culicidae) Temephos® in the City of Naviraí, MS, Brazil

Scudeler, Cintia Granzotti da Silva; Arruda, Eduardo José de; Andrade, Carlos Fernando Salgueirosa de; Silva, Tania Granzotti; Fernandes, Magda Freitas; Teixeira, Tatiane Zaratini; Cabrini, Isaías

doi:10.17807/orbital.v7i3.746

Cited by 2 publications

(1 citation statement)

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“…quinquefasciatus from Brazil came from Rio de Janeiro populations evaluated with chlorpyrifos in 1978 [48] and later in 1994 [49]. Resistance to the larvicide temephos was described in populations from Campinas (São Paulo State) [50], Santa Cruz do Capibaribe (Pernambuco State) and Campo Grande [51] and Naviraí [52] (Mato Grosso do Sul State). In addition, a population from Cuiabá (Mato Grosso State) collected in 2000 was classified as “tolerant”, while Ae.…”

Section: Organophosphates and Carbamatesmentioning

confidence: 99%

Insecticide resistance in Culex quinquefasciatus Say, 1823 in Brazil: a review

2019

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Culex quinquefasciatus is a successful invasive species broadly distributed in subtropical regions, including Brazil. It is an extremely annoying mosquito due to its nocturnal biting behavior, in high-density populations and it is a potential bridge between sylvatic arbovirus from birds to man in urban territories. Herein, we present a review concerning the methods of chemical control employed against Cx. quinquefasciatus in Brazil since the 1950’s and insecticide resistance data registered in the literature. As there is no specific national programme for Cx. quinquefasciatus control in Brazil, the selection of insecticide resistance is likely due in part to the well-designed chemical campaigns against Aedes aegypti and the elevated employment of insecticides by households and private companies. There are very few publications about insecticide resistance in Cx. quinquefasciatus from Brazil when compared to Ae. aegypti. Nevertheless, resistance to organophosphates, carbamate, DDT, pyrethroids and biolarvicides has been registered in Cx. quinquefasciatus populations from distinct localities of the country. Concerning physiological mechanisms selected for resistance, distinct patterns of esterases, as well as mutations in the acetylcholinesterase (ace-1) and voltage-gated sodium channel (NaV) genes, have been identified in natural populations. Given environmental changes and socioeconomical issues in the cities, in recent years we have been experiencing an increase in the number of disease cases caused by arboviruses, which may involve Cx. quinquefasciatus participation as a key vector. It is urgent to better understand the efficiency and susceptibility status to insecticides, as well as the genetic background of known resistant mechanisms already present in Cx. quinquefasciatus populations for an effective and rapid chemical control when eventually required.

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