scholarly journals Insecticide Susceptibility Status of Aedes albopictus in Dengue Hotspot Areas in Malaysia

2021 ◽  
Vol 14 ◽  
pp. 1-8
Author(s):  
WAN FATMA ZUHARAH ◽  
WAN FATMA ZUHARAH ◽  
Ahmad Mohiddin ◽  
Asmalia Md Lasim ◽  
Zairi Jaal ◽  
...  
Keyword(s):  
Insecticide Resistance ◽  
Vector Control ◽  
Aedes Albopictus ◽  
Continuous Monitoring ◽  
Reference Strain ◽  
Control Program ◽  
Aedes Mosquitoes ◽  
Northern District ◽  
Vector Control Program ◽  
Susceptibility Status

The vector control program has become challenging due to the resistance problem occurs in Aedes mosquitoes. Aedes albopictus (Skuse, 1894) is the most dominant species contributing as a vector of dengue, Chikungunya and Zika viruses in Malaysia. Knowledge of the current insecticide resistance of Ae. albopictus is essential for the success of vector control program. Here, we reported the susceptibility status of Ae. albopictus collected from the dengue hotspot areas in the Northern District of Penang Island, Malaysia on three common use insecticides in vector control program. Aedes albopictus was sampled from three localities at Flat Hamna, Kampung Sungai Gelugor and Kampung Tanjung Tokong in the Northern District of Penang Island, Malaysia. The adult bioassay results suggested the Flat Hamna strain (FH) was found to develop incipient resistance after 24h exposure towards all three insecticides tested; permethrin, deltamethrin and malathion (mortality 97-87%). With 1.93 fold of Resistance Ratio 50 (RR50) values, FH strains have the highest chances to develop resistance towards permethrin. Among all insecticides tested, malathion was contributed to significantly higher KdT50 in all Ae. albopictus strains as compared to VCRU reference strain (p<0.001). Thus suggesting malathion insecticide is the least effective insecticide in our vector control program. Our finding can be used as a baseline for insecticide resistance of Ae. albopictus to improve vector control across Malaysia. Permethrin and deltamethrin are still reliable to be used in the control program, nonetheless require continuous monitoring on their susceptibility towards Ae. albopictus.

scholarly journals Multiple Insecticide Resistance: An Impediment to Insecticide-Based Malaria Vector Control Program

PLoS ONE ◽  
2011 ◽  
Vol 6 (1) ◽  
pp. e16066 ◽  
Author(s):  
Delenasaw Yewhalaw ◽  
Fantahun Wassie ◽  
Walter Steurbaut ◽  
Pieter Spanoghe ◽  
Wim Van Bortel ◽  
...  
Keyword(s):  
Insecticide Resistance ◽  
Vector Control ◽  
Malaria Vector ◽  
Control Program ◽  
Malaria Vector Control ◽  
Vector Control Program

Current Situation of Malaria and Resistance of Main Vectors to WHO Recommended Insecticides in an Endemic Area, Southeastern Iran

2021 ◽  
Author(s):  
Nasrollah Saberi ◽  
Ahmad Raeisi ◽  
Mohammad Amin Gorouhi ◽  
Hassan Vatandoost ◽  
Minoo Mashayekhi ◽  
...  
Keyword(s):  
Vector Control ◽  
Anopheles Stephensi ◽  
Control Program ◽  
Current Situation ◽  
Health Centers ◽  
Malaria Vector Control ◽  
Vector Control Program ◽  
Transmission Area ◽  
Susceptibility Status ◽  
Local Transmission

Abstract Although malaria is endemic in some areas of southeastern Iran, following the successful national malaria elimination plan, the local transmission area has been shrunk. The main cases in Iran are due to Plasmodium vivax followed by P. falciparum. This study was aimed to determine the current situation of malaria in Kerman Province of Iran and evaluate the insecticide resistance of main vectors. The field study was conducted in 2019. Data of new malaria cases were obtained from the health centers for the period of 2009–2018. Susceptibility status of Anopheles stephensi and An. dthali was evaluated against dichlorodiphenyltrichloroethane, Dieldrin, Malathion, Bendiocarb, Deltamethrin, and Temephos at the diagnostic dose. A total of 522 malaria cases were recorded and divided into indigenous (33.14%) and imported (66.86%) categories. The highest incidence of the disease was reported from the southern areas of the province, where all indigenous cases occurred. Adults of An. stephensi were resistant to dichlorodiphenyltrichloroethane while its resistance to be confirmed to dieldrin, bendiocarb and deltamethrin. As An. dthali had less than 98% mortality against bendiocarb, the resistance status should be confirmed with more tests. Our findings showed both species had less than 98% mortality against bendiocarb and deltamethrin insecticides which are used in malaria vector control program in Iran. Due to the susceptibility of these vectors to temephos, larviciding can be advised for vector control in this area.

scholarly journals A Challenge for a Unique Dengue Vector Control Programme: Assessment of the Spatial Variation of Insecticide Resistance Status amongst Aedes aegypti and Aedes albopictus Populations in Gampaha District, Sri Lanka

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Rasika Dalpadado ◽  
Nayana Gunathilaka ◽  
Deepika Amarasinghe ◽  
Lahiru Udayanaga
Keyword(s):  
Sri Lanka ◽  
Aedes Aegypti ◽  
Insecticide Resistance ◽  
Vector Control ◽  
Aedes Albopictus ◽  
Rural Areas ◽  
Medical Officer ◽  
Public Health Problem ◽  
World Health ◽  
Susceptibility Status

Background. To date, dengue is considered an important public health problem in Sri Lanka. Irrational use of insecticides without evidence-based applications has primed the development of resistance in mosquito vectors. Method. The present study investigated the resistance status of Aedes aegypti and Aedes albopictus to commonly used insecticides in three selected Medical Officer of Health (MOH) areas (i.e., Attanagalla, Dompe, and Negombo) in Gampaha District, Western Province of Sri Lanka. Entomological surveys were performed using ovitraps and larval collections. Larval bioassays were carried out to determine the LC50, LC90, and LC95 and susceptibility status for organophosphate temephos, whereas adult bioassays were performed to test the 0.03% deltamethrin and 0.8% malathion susceptibility. Results. The study revealed that the temephos concentrations required to control Ae. aegypti (13.7-17.7 times) and Ae. albopictus (4.6-7.6 times) are higher than the diagnostic concentration (0.012 mg/L) proposed by the World Health Organization. The highest resistance levels were observed for both Ae. aegypti ( 14 ± 1.87 ) and Ae. albopictus ( 36 ± 1.87 ) collected from the Negombo MOH area. Therefore, the WHO recommended diagnostic concentration is no longer effective in controlling Ae. aegypti and Ae. albopictus larvae in these areas. Both the dengue vectors have evolved a high level of insecticide resistance to malathion and deltamethrin in the Gampaha District except Ae. albopictus mosquitoes in rural areas. Further, vectors in rural areas are indicated susceptible (>98%) to pyrethroids and emergence of resistance (<97%) for organophosphate insecticides. Conclusion. The results of this study warrant the vector management authorities on the proper application of insecticides and rational use in vector control. The susceptibility status of vector mosquitoes should be continuously monitored especially in dengue-endemic areas parallel to the routine surveillance programme. Further molecular studies are strongly recommended to determine the Knockdown Resistance (kdr) mutations among Aedes populations.

scholarly journals Susceptibility Status of a Recently Introduced Population of Aedes albopictus to Insecticides Used by the Vector Control Program in Merida, Yucatan, Mexico

2021 ◽  
Vol 37 (3) ◽  
pp. 164-168
Author(s):  
Y. Contreras-Perera ◽  
G. Gonzá lez-Olvera ◽  
A. Che-Mendoza ◽  
P. Mis-Avila ◽  
J. Palacio-Vargas ◽  
...  
Keyword(s):  
Vector Control ◽  
Aedes Albopictus ◽  
Control Strategies ◽  
Mosquito Species ◽  
Control Program ◽  
Suburban Area ◽  
Vector Control Program ◽  
Control And Prevention ◽  
Invasive Mosquito ◽  
Established Population

ABSTRACT In recent years, Aedes albopictus has become the most important invasive mosquito species worldwide. In 2018, Ae. albopictus was found in a suburban area of Merida, one of the cities with the highest number of arbovirus cases in Mexico in the last 10 years. As Ae. albopictus continues its range expansion, there is a need to monitor its susceptibility to existing insecticide classes, since countries like Mexico currently do not consider Ae. albopictus in its insecticide management programs. In order to determine its susceptibility to the insecticides usually applied by the vector control program in Mexico, the Centers for Disease Control and Prevention bottle bioassays were performed on individuals from established population of Ae. albopictus from Merida, Yucatan, Mexico. Results suggested that the population recently found in the suburban area of Merida is susceptible to permethrin, deltamethrin, chlorpyrifos, malathion, bendiocarb, and propoxur. Further studies of insecticide resistance using biochemical and molecular tools together with more knowledge of the biology and ecology of this species are necessary to generate specific and efficient control strategies in Mexico.

scholarly journals Autodissemination of Pyriproxyfen as Novel Strategy to Control Dengue Outbreaks: A Review

2020 ◽  
Author(s):  
Ahmad Mohiddin Mohd Ngesom ◽  
Asmalia Md Lasim ◽  
Mazrura Sahani ◽  
Rozita Hod ◽  
Hidayatulfathi Othman
Keyword(s):  
Vector Control ◽  
Promising Result ◽  
Central Africa ◽  
Control Program ◽  
Breeding Site ◽  
Breeding Sites ◽  
Aedes Mosquitoes ◽  
Delivery Technique ◽  
Vector Control Program ◽  
Novel Strategy

The new emergence and re-emergence of arbovirus infections vectored by Aedes mosquitoes have been spread across Southeast Asia, Central Africa, United States, tropical Oceania and become a major of public health concerns. These arbovirus diseases found to have a similar vector, symptoms of the diseases and environments. The situation has become complicated without any specific vaccine or treatment for the diseases. As far as we concern, vector control is the best defense with many challenges, a scattered breeding site and biological behavioral sometimes, more difficult to control. Herein, we present a review of studies on current techniques proposed to combat arbovirus infections vectored by Aedes mosquitoes. A crucial gap in a vector control program is the inability to eliminate and destroy the cryptic breeding site by using conventional control methods. The idea and proper concept of using mosquitoes to bring insecticide to their oviposition site had been getting more interest in people to explore. Autodissemination is a self-delivery technique by manipulating the behavior of mosquitoes, carrying the insecticide and disseminate to cryptic breeding sites. This technique has shown a promising result in some countries and can be considered as additional tools in a vector control program

scholarly journals Assessment of Aedes aegypti Pupal Productivity during the Dengue Vector Control Program in a Costal Urban Centre of São Paulo State, Brazil

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Marylene de Brito Arduino
Keyword(s):  
Vector Control ◽  
Large City ◽  
Control Program ◽  
Sao Paulo ◽  
São Paulo ◽  
Dengue Vector ◽  
Urban Centre ◽  
Vector Control Program ◽  
Productivity Indices ◽  
Dengue Vector Control

The control of dengue relies on the elimination of vector breeding sites. This study identified the container categories most productive for A. aegypti within the framework of the São Paulo dengue vector control program (DVCP) in São Sebastião, a large city located on the state’s coast where dengue cases have occurred since 2001. Containers were inspected monthly for the occurrence of mosquito immature stages during two consecutive vector-breeding seasons in 2002–2004. Containers were classified by their material, use, and fixed or removable status. Pupal productivity differed significantly among container types, items made of metal and plastic, and boats being those with the highest relative contribution. Significant correlations between traditional indices of A. aegypti abundance (Container Index, House Index, and Breteau Index) and pupal productivity/demographic indices (Pupae/Container, Pupae/House, Pupae/ha, and Pupae/Person) ranged 0.56–0.65; correlations were not statistically significant for any combination involving the Pupae/Container index. The assessment of pupal productivity indices could be incorporated into the DVCP without any additional operational onus, allowing vector control managers to determine appropriate control actions targeting the most productive containers and sites. Further studies are needed to assess whether pupal productivity indices may be used as epidemiological indicators of risk of dengue transmission.

scholarly journals Bioassay and molecular monitoring of insecticide resistance status in Aedes albopictus populations from Greece, to support evidence-based vector control

2020 ◽  
Vol 13 (1) ◽  
Author(s):  
Sofia Balaska ◽  
Emmanouil A. Fotakis ◽  
Ilias Kioulos ◽  
Linda Grigoraki ◽  
Spyridoula Mpellou ◽  
...  
Keyword(s):  
Insecticide Resistance ◽  
Vector Control ◽  
Aedes Albopictus ◽  
Evidence Based ◽  
Molecular Monitoring ◽  
Support Evidence

scholarly journals Effectiveness of Large-Scale Chagas Disease Vector Control Program in Nicaragua by Residual Insecticide Spraying Against Triatoma dimidiata

2015 ◽  
Vol 93 (6) ◽  
pp. 1231-1239 ◽  
Author(s):  
Kota Yoshioka ◽  
Jiro Nakamura ◽  
Lenin Pérez ◽  
Yuichiro Tabaru ◽  
Doribel Tercero ◽  
...  
Keyword(s):  
Vector Control ◽  
Chagas Disease ◽  
Large Scale ◽  
Control Program ◽  
Disease Vector ◽  
Vector Control Program
Sign in / Sign up

Export Citation Format

Share Document