Development of physiological resistance and its stage specificity in Culex quinquefasciatus after selection with deltamethrin in Assam, India.
Identifieur interne : 006325 ( Main/Exploration ); précédent : 006324; suivant : 006326Development of physiological resistance and its stage specificity in Culex quinquefasciatus after selection with deltamethrin in Assam, India.
Auteurs : Manas Sarkar [Inde] ; Indra K. Bhattacharyya ; Aparajita Borkotoki ; Indra Baruah ; Ravi B. SrivastavaSource :
- Memorias do Instituto Oswaldo Cruz [ 1678-8060 ] ; 2009.
Descripteurs français
- KwdFr :
- Animaux, Culex (), Culex (génétique), Dose létale 50, Femelle, Filariose lymphatique (transmission), Inde, Insecticides, Larve (), Larve (croissance et développement), Nitriles, Pyréthrines, Résistance aux insecticides (génétique), Sélection génétique (génétique), Vecteurs insectes (), Vecteurs insectes (génétique).
- MESH :
- croissance et développement : Larve.
- génétique : Culex, Résistance aux insecticides, Sélection génétique, Vecteurs insectes.
- Animaux, Culex, Dose létale 50, Femelle, Filariose lymphatique, Inde, Insecticides, Larve, Nitriles, Pyréthrines, Vecteurs insectes.
- Wicri :
- geographic : Inde.
English descriptors
- KwdEn :
- Animals, Culex (drug effects), Culex (genetics), Elephantiasis, Filarial (transmission), Female, India, Insect Vectors (drug effects), Insect Vectors (genetics), Insecticide Resistance (genetics), Insecticides, Larva (drug effects), Larva (growth & development), Lethal Dose 50, Nitriles, Pyrethrins, Selection, Genetic (genetics).
- MESH :
- chemical : Insecticides, Nitriles, Pyrethrins.
- geographic : India.
- drug effects : Culex, Insect Vectors, Larva.
- genetics : Culex, Insect Vectors, Insecticide Resistance, Selection, Genetic.
- growth & development : Larva.
- transmission : Elephantiasis, Filarial.
- Animals, Female, Lethal Dose 50.
Abstract
The study investigated the development and stage specificity of physiological resistance to insecticides in a colony of Culex quinquefasciatus Say (Diptera: Culicidae) mosquitoes, which are vectors of bancroftian filariasis in India, after selection with deltamethrin. Resistance was selected by exposing the larvae to the concentration of deltamethrin that caused 50% mortality in the tested population (i.e., LC50). Under continuous selection pressure, the LC50 increased steadily in subsequent generations. The estimated LC50 for the F0 generation was 0.409 microg/L; the LC50 first displayed a substantial increase in the F5 generation (5.616 microg/L) and reached 121.902 microg/L in the F10 generation. The objective of this study was to establish a deltamethrin-resistant colony to develop a research programme that will study the evolution of physiological resistance patterns and stage-specific resistance responses in Cx. quinquefasciatus larvae and adults under laboratory conditions. An approximately 298-fold increase in resistance was recorded after 10 generations, as evidenced by the resistance ratio (RR50). The progress and effect of the selection pressure in the adult stage was monitored with the World Health Organisation (WHO) diagnostic test. The mortality, as observed using the WHO diagnostic test, declined significantly from the F5 generation (85%) onwards and the highest rate of survival (65%) was observed in the F10 generation.
PubMed: 19820823
Affiliations:
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Resistance was selected by exposing the larvae to the concentration of deltamethrin that caused 50% mortality in the tested population (i.e., LC50). Under continuous selection pressure, the LC50 increased steadily in subsequent generations. The estimated LC50 for the F0 generation was 0.409 microg/L; the LC50 first displayed a substantial increase in the F5 generation (5.616 microg/L) and reached 121.902 microg/L in the F10 generation. The objective of this study was to establish a deltamethrin-resistant colony to develop a research programme that will study the evolution of physiological resistance patterns and stage-specific resistance responses in Cx. quinquefasciatus larvae and adults under laboratory conditions. An approximately 298-fold increase in resistance was recorded after 10 generations, as evidenced by the resistance ratio (RR50). The progress and effect of the selection pressure in the adult stage was monitored with the World Health Organisation (WHO) diagnostic test. The mortality, as observed using the WHO diagnostic test, declined significantly from the F5 generation (85%) onwards and the highest rate of survival (65%) was observed in the F10 generation.</div></front></TEI><affiliations><list><country><li>Inde</li></country></list><tree><noCountry><name sortKey="Baruah, Indra" sort="Baruah, Indra" uniqKey="Baruah I" first="Indra" last="Baruah">Indra Baruah</name><name sortKey="Bhattacharyya, Indra K" sort="Bhattacharyya, Indra K" uniqKey="Bhattacharyya I" first="Indra K" last="Bhattacharyya">Indra K. Bhattacharyya</name><name sortKey="Borkotoki, Aparajita" sort="Borkotoki, Aparajita" uniqKey="Borkotoki A" first="Aparajita" last="Borkotoki">Aparajita Borkotoki</name><name sortKey="Srivastava, Ravi B" sort="Srivastava, Ravi B" uniqKey="Srivastava R" first="Ravi B" last="Srivastava">Ravi B. Srivastava</name></noCountry><country name="Inde"><noRegion><name sortKey="Sarkar, Manas" sort="Sarkar, Manas" uniqKey="Sarkar M" first="Manas" last="Sarkar">Manas Sarkar</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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