scholarly journals MECHANISMS OF INSECTICIDE RESISTANCE IN FIELD POPULATIONS OF AEDES AEGYPTI (L.) FROM QUINTANA ROO, SOUTHERN MEXICO

2006 ◽  
Vol 22 (4) ◽  
pp. 672-677 ◽  
Author(s):  
ADRIANA E. FLORES ◽  
JAIME SALOMON GRAJALES ◽  
ILDEFONSO FERNANDEZ SALAS ◽  
GUSTAVO PONCE GARCIA ◽  
MA. HAYDEE LOAIZA BECERRA ◽  
...  
Keyword(s):  
Aedes Aegypti ◽  
Insecticide Resistance ◽  
Quintana Roo ◽  
Southern Mexico

scholarly journals Effect of Selection for Pyrethroid Resistance on Abiotic Stress Tolerance in Aedes aegypti from Merida, Yucatan, Mexico

Insects ◽  
2021 ◽  
Vol 12 (2) ◽  
pp. 124
Author(s):  
Keenan Amer ◽  
Karla Saavedra-Rodriguez ◽  
William C. Black ◽  
Emilie M. Gray
Keyword(s):  
Life History ◽  
Abiotic Stress ◽  
Aedes Aegypti ◽  
Insecticide Resistance ◽  
Stress Resistance ◽  
Pyrethroid Resistance ◽  
Southern Mexico ◽  
Life History Parameters ◽  
Trade Offs ◽  
Selection For

The study of fitness costs of insecticide resistance mutations in Aedes aegypti has generally been focused on life history parameters such as fecundity, mortality, and energy reserves. In this study we sought to investigate whether trade-offs might also exist between insecticide resistance and other abiotic stress resistance parameters. We evaluated the effects of the selection for permethrin resistance specifically on larval salinity and thermal tolerance. A population of A. aegypti originally from Southern Mexico was split into two strains, one selected for permethrin resistance and the other not. Larvae were reared at different salinities, and the fourth instar larvae were subjected to acute thermal stress; then, survival to both stresses was compared between strains. Contrary to our predictions, we found that insecticide resistance correlated with significantly enhanced larval thermotolerance. We found no clear difference in salinity tolerance between strains. This result suggests that insecticide resistance does not necessarily carry trade-offs in all traits affecting fitness and that successful insecticide resistance management strategies must account for genetic associations between insecticide resistance and abiotic stress resistance, as well as traditional life history parameters.

Distribution and Frequency of the kdr Mutation V410L in Natural Populations of Aedes aegypti (L.) (Diptera: Culicidae) From Eastern and Southern Mexico

2019 ◽  
Vol 57 (1) ◽  
pp. 218-223 ◽  
Author(s):  
Olga K Villanueva-Segura ◽  
Kevin A Ontiveros-Zapata ◽  
Beatriz Lopez-Monroy ◽  
Gustavo Ponce-Garcia ◽  
Selene M Gutierrez-Rodriguez ◽  
...  
Keyword(s):  
Aedes Aegypti ◽  
Natural Populations ◽  
Resistance Management ◽  
Allelic Frequency ◽  
Quintana Roo ◽  
Southern Mexico ◽  
Specific Pcr ◽  
Allele Specific ◽  
Primary Vector ◽  
Allele Specific Pcr

Abstract Aedes aegypti (L.) is the primary vector of the viruses that cause dengue, Zika, and chikungunya, for which effective vaccines and drugs are still lacking. Current strategies for suppressing arbovirus outbreaks based on insecticide use pose a challenge because of the rapid increase in resistance. The widespread and excessive use of pyrethroid-based insecticides has created a large selection pressure for a kdr-type resistance, caused by mutations in the para gene of the voltage-gated sodium channel (vgsc). Our objective was to evaluate the allelic frequency of natural populations of Ae. aegypti of Mexico at codon 410 of the para gene. Twenty-six Ae. aegypti populations from east and southern Mexico were genotyped for the codon 410 using allele-specific PCR. The frequencies of the L410 allele in Ae. aegypti ranged from 0.10 to 0.99; however, most of the frequencies were in the range of 0.36 to 0.64. The highest frequencies were found in three populations from the state of Veracruz, namely, Minatitlan with 0.99, Poza Rica with 0.82, and Jose Cardel with 0.97, along with populations from Cancun in Quintana Roo with 0.93, Frontera in Tabasco with 0.91, and Ciudad del Carmen in Campeche with 0.86. The frequency of the L410 allele was high in all populations of Ae. aegypti with higher values in populations of the southeast of the country. The knowledge of specific substitutions in vgsc and their interaction to confer resistance is essential to predict and develop future strategies for resistance management in Ae. aegypti in Mexico.

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 Co-occurrence of kdr Mutations V1016I and F1534C and Its Association With Phenotypic Resistance to Pyrethroids in Aedes aegypti (Diptera: Culicidae) Populations From Costa Rica

2019 ◽  
Vol 57 (3) ◽  
pp. 830-836
Author(s):  
Aryana Zardkoohi ◽  
David Castañeda ◽  
Juan C Lol ◽  
Carmen Castillo ◽  
Francisco Lopez ◽  
...  
Keyword(s):  
Costa Rica ◽  
Aedes Aegypti ◽  
Insecticide Resistance ◽  
Vector Control ◽  
Strong Association ◽  
Resistance Management ◽  
Management Plan ◽  
Costa Rican ◽  
Mosquito Vector ◽  
Phenotypic Resistance

Abstract Aedes aegypti (Linnaeus, 1762) is considered the most important mosquito vector species for several arboviruses (e.g., dengue, chikungunya, Zika) in Costa Rica. The primary strategy for the control and prevention of Aedes-borne diseases relies on insecticide-based vector control. However, the emergence of insecticide resistance in the mosquito populations presents a significant threat to these prevention actions. The characterization of the mechanisms driving the insecticide resistance in Ae. aegypti is vital for decision making in vector control programs. Therefore, we analyzed the voltage-gated sodium channel (VGSC) gene for the presence of the V1016I and F1534C kdr mutations in Ae. aegypti populations from Puntarenas and Limon provinces, Costa Rica. The CDC bottle bioassays showed that both Costa Rican Ae. aegypti populations were resistant to permethrin and deltamethrin. In the case of kdr genotyping, results revealed the co-occurrence of V1016I and F1534C mutations in permethrin and deltamethrin-resistant populations, as well as the fixation of the 1534C allele. A strong association between these mutations and permethrin and deltamethrin resistance was found in Puntarenas. Limon did not show this association; however, our results indicate that the Limon population analyzed is not under the same selective pressure as Puntarenas for the VGSC gene. Therefore, our findings make an urgent call to expand the knowledge about the insecticide resistance status and mechanisms in the Costa Rican populations of Ae. aegypti, which must be a priority to develop an effective resistance management plan.

scholarly journals Widespread insecticide resistance in Aedes aegypti L. from New Mexico, U.S.A.

PLoS ONE ◽  
2019 ◽  
Vol 14 (2) ◽  
pp. e0212693 ◽  
Author(s):  
Yashoda Kandel ◽  
Julia Vulcan ◽  
Stacy D. Rodriguez ◽  
Emily Moore ◽  
Hae-Na Chung ◽  
...  
Keyword(s):  
New Mexico ◽  
Aedes Aegypti ◽  
Insecticide Resistance

Insecticide resistance in the major dengue vectors Aedes albopictus and Aedes aegypti

2012 ◽  
Vol 104 (2) ◽  
pp. 126-131 ◽  
Author(s):  
J. Vontas ◽  
E. Kioulos ◽  
N. Pavlidi ◽  
E. Morou ◽  
A. della Torre ◽  
...  
Keyword(s):  
Aedes Aegypti ◽  
Insecticide Resistance ◽  
Aedes Albopictus ◽  
Dengue Vectors

Tests for Insecticide-resistance in Lice, Mosquitos and House-flies

1953 ◽  
Vol 44 (4) ◽  
pp. 729-738 ◽  
Author(s):  
J. R. Busvine ◽  
C. Mary Harrison
Keyword(s):  
Aedes Aegypti ◽  
Insecticide Resistance ◽  
Laboratory Culture ◽  
Standard Test ◽  
House Flies ◽  
Comparative Tests ◽  
Laboratory Cultures ◽  
Virus Research ◽  
Nigerian Strain ◽  
Body Lice

Between December 1947 and May 1949, six colonies of body lice from various sources were cultured in the laboratory. Three of the strains originated from natural infestations in England and the others came from laboratory cultures in Hamburg, Basle and Tunis. After being bred for at least one generation in the laboratory, these lice were subjected to a standard test for resistance to DDT. Only one strain showed any evidence of abnormal resistance; this was the strain from Tunis where it had been laboratory-cultured for over 12 years.Colonies of Aëdes aegypti from Karachi, Poona and Delhi were being cultured at the Virus Research Institute, Lagos, together with a local Nigerian strain. Extensive tests showed no difference in average susceptibility of the four strains to DDT, though there was some evidence of differences in the spread of resistance through the various populations.A colony of A. aegypti was started with larvae taken from Ilaro, a Nigerian town which had been regularly sprayed with BHC for 2½ years. Comparative tests showed no difference in resistance to γ BHC between this colony and a laboratory culture at the Malaria Service Laboratory, Lagos.Colonies of house-flies were initiated and maintained at Lagos. Tests with insecticides gave the following results:(a) M.d. vicina from Ilaro were much more resistant to γ BHC than similar flies from Yaba, near Lagos, or M.d. domestica from England.(b) The M.d. vicina from both Lagos and Ilaro were considerably more resistant to DDT than M.d. domestica from England. This is surprising, as no DDT-spraying has been done at Ilaro and, so far as can be ascertained, virtually none in Lagos.(c) The M.d. vicina flies from Lagos were considerably more susceptible to γ BHC and dieldrin than M.d. domestica from England. M. sorbens was much more susceptible to γ BHC and to DDT. These differences could be explained by the smaller average sizes of the two susceptible species.

scholarly journals Insecticide resistance and its underlying mechanisms in field populations of Aedes aegypti adults (Diptera: Culicidae) in Singapore

2014 ◽  
Vol 7 (1) ◽  
Author(s):  
Sin-Ying Koou ◽  
Chee-Seng Chong ◽  
Indra Vythilingam ◽  
Chow-Yang Lee ◽  
Lee-Ching Ng
Keyword(s):  
Aedes Aegypti ◽  
Insecticide Resistance ◽  
Underlying Mechanisms
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