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Behavioral responses of Aedes aegypti (Diptera: Culicidae) exposed to deltamethrin and possible implications for disease control.

Behavioral responses of nine Aedes aegypti (L.) strains, six from recent field collections and three from the long-established laboratory colonies, were tested under laboratory-controlled conditions by using an excito-repellency test system. All nine strains showed significant behavioral escape responses when exposed to deltamethrin at the standard field dose (0.02 g/m2), regardless of background insecticide susceptibility status (susceptible or tolerant/resistant). Insecticide contact irritancy played a predominate role in overall female mosquito escape responses, whereas noncontact repellenc

Expanding the antimalarial toolkit: Targeting host-parasite interactions.

Recent successes in malaria control are threatened by drug-resistant Plasmodium parasites and insecticide-resistant Anopheles mosquitoes, and first generation vaccines offer only partial protection. New research approaches have highlighted host as well as parasite molecules or pathways that could be targeted for interventions. In this study, we discuss host-parasite interactions at the different stages of the Plasmodium life cycle within the mammalian host and the potential for therapeutics that prevent parasite migration, invasion, intracellular growth, or egress from host cells, as well as p

Malaria - an overview.

Malaria is caused by protozoan parasites of the genus Plasmodium and is a major cause of mortality and morbidity worldwide. These parasites have a complex life cycle in their mosquito vector and vertebrate hosts. The primary factors contributing to the resurgence of malaria are the appearance of drug-resistant strains of the parasite, the spread of insecticide-resistant strains of the mosquito and the lack of licensed malaria vaccines of proven efficacy. This minireview includes a summary of the disease, the life cycle of the parasite, information relating to the genome and proteome of the spe

CYP321F3 mediates metabolic resistance to methoxyfenozide in rice stem borer, Chilo suppressalis.

The development of insecticide resistance in insect populations is a major challenge to sustainable agriculture and food security worldwide. Methoxyfenozide, an insect growth regulator that acts as an agonist of 20-hydroxyecdysone (20E), has severely declined in its efficacy against the rice stem borer (Chilo suppressalis), a notorious pest of rice crops in East and Southeast Asia. To date, however, the genes involved in methoxyfenozide resistance in target pests remain unclear. We conducted a long-term (seven years from 2017 to 2023) and large geographical scale (8 provinces and 45 cities in …

A transgenic approach to control hemipteran insects by expressing insecticidal genes under phloem-specific promoters.

The first generation transgenic crops used strong constitutive promoters for transgene expression. However, tissue-specific expression is desirable for more precise targeting of transgenes. Moreover, piercing/sucking insects, which are generally resistant to insecticidal Bacillus thuringiensis (Bt) proteins, have emerged as a major pests since the introduction of transgenic crops expressing these toxins. Phloem-specific promoters isolated from Banana bunchy top virus (BBTV) were used for the expression of two insecticidal proteins, Hadronyche versuta (Blue Mountains funnel-web spider) neurotox

Toxicological assays for testing effects of an epigenetic drug on development, fecundity and survivorship of malaria mosquitoes.

Insecticidal resistance poses a major problem for malaria control programs. Mosquitoes adapt to a wide range of changes in the environment quickly, making malaria control an omnipresent problem in tropical countries. The emergence of insecticide resistant populations warrants the exploration of novel drug target pathways and compounds for vector mosquito control. Epigenetic drugs are well established in cancer research, however not much is known about their effects on insects. This study provides a simple protocol for examining the toxicological effects of 3-Deazaneplanocin A (DZNep), an exper

[Prevention and control of leishmaniasis vectors: current approaches].

Phlebotomine sandflies (Diptera: Psychodidae) are the suspected or proven vectors of Leishmania spp. in at least 88 countries, including over 40 Phlebotomus species in the Old World and a further 30 belonging to the genus Lutzomyia in the New World. In recent years, both cutaneous (CL) and zoonotic visceral leishmaniasis (ZVL) have become increasingly prevalent in urban areas, including large Latin American cities. A similar trend has been recorded in all Mediterranean areas during the last decade. Based on mathematical models, insecticidal control of sandflies appears to represent a more effe

Transforming malaria prevention and control: the prospects and challenges of gene drive technology for mosquito management.

Background: In the era of insecticides and anti-malarial drug resistance, gene drive technology holds considerable promise for malaria control. Gene drive technology deploys genetic modifications into mosquito populations to impede their ability to transmit the malaria parasite. This can be either through the disruption of an essential mosquito gene or the association of gene drive with a desirable effector gene. CRISPR (Clustered Regularly Interspaced Short Palindromic Repeats) is a gene editing tool that precisely modifies mosquito vector DNA sequences and curtails the rate of pathogen trans

Kdr genotyping (V1016I, F1534C) of the Nav channel of Aedes aegypti (L.) mosquito populations in Harris County (Houston), Texas, USA, after Permanone 31-66 field tests and its influence on probability of survival.

Aedes aegypti (L.) is an important mosquito vector of emerging arboviruses such as Zika, dengue, yellow fever, and chikungunya. To quell potential disease outbreaks, its populations are controlled by applying pyrethroid insecticides, which selection pressure may lead to the development of insecticide resistance. Target site insensitivity to pyrethroids caused by non-synonymous knockdown resistance (kdr) mutations in the voltage-gated sodium (NaV) channel is a predominant mechanism of resistance in mosquitoes. To evaluate the potential impact of pyrethroid resistance on vector control, Ae. aegy…

The effect of urban and rural water pollutants on the life history of the major malaria vector Anopheles arabiensis (Diptera: Culicidae).

Malaria is the most significant vector-borne disease globally, and its transmission in Africa has historically been concentrated in rural regions. In South Africa, Anopheles arabiensis, a member of the An. gambiae complex, is the primary malaria vector and is also predominately associated with rural areas, where it breeds in agricultural landscapes. However, throughout Africa, the An. gambiae complex is increasingly adapting to breeding in urban areas and contributing to urban malaria transmission. Understanding the capacity of An. arabiensis to withstand water pollutants characteristic of eit

Malaria vectors in the Greater Mekong Subregion: overview of malaria vectors and remaining challenges.

Malaria transmission in the Greater Mekong Subregion depends on, among other factors, vector behavior and ecology, and the degree of contact … ransmission cycles, more strategic investments into research on outdoor transmission, monitoring of insecticide resistance, vector species identities, vector mapping, target profiles of new control technologies and delivery systems are required.

The invasive MED/Q Bemisia tabaci genome: a tale of gene loss and gene gain.

BACKGROUND: Sweetpotato whitefly, Bemisia tabaci MED/Q and MEAM1/B, are two economically important invasive species that cause considerable … es and UDP glycosyltransferases in MED/Q and MEAM1/B genome is functionally validated for mediating insecticide resistance in MED/Q using in vivo RNAi. The amino acid biosynthesis pathways in MED/Q genome are partitioned among the host and endosymbiont genomes in a manner distinct from other hemipterans. Evidence of horizontal gene transfer to the host genome may explai …

Hidden genomic features of an invasive malaria vector, Anopheles stephensi, revealed by a chromosome-level genome assembly.

BACKGROUND: The mosquito Anopheles stephensi is a vector of urban malaria in Asia that recently invaded Africa. Studying the genetic basis o … of TEs in genome evolution and phenotypic variation. We discovered 29 previously hidden members of insecticide resistance genes, uncovering new candidate genetic elements for the widespread insecticide resistance observed in An. stephensi. We identified 2.4 Mb of the Y chromosome and seven new male-linked gene candidates, representing the most extensive coverage of the …

A masked gene concealed hand in glove in the forkhead protein crocodile regulates the predominant detoxification CYP6DA1 in Aphis gossypii Glover.

Cytochrome P450-mediated metabolism is an important mechanism of insecticide resistance, most studies show upregulated transcript levels of P450s in resistant insect strains. Our previous studies illustrated that some upregulated P450s were associated with cyantraniliprole resistance, and it is more comprehensive to use the tissue specificity of transcriptomes to compare resistant (CyR) and susceptible (SS) strains. In this study, the expression profiles of P450s in a CyR strain compared with a SS strain in remaining carcass or midgut were investigated by RNA sequencing, and candidate genes we…

Exploring the insecticidal and antimalarial potentials of Pseudomonas aeruginosa azurin: A promising alternative for integrated malaria control.

BACKGROUND: Malaria, caused by Plasmodium falciparum, remains a significant global health challenge, necessitating the development of new, effective control strategies. Similarly, Anopheles funestus mosquitoes, major vectors for malaria transmission, require sustainable insecticidal control measures. Thus, this study explores, the combined insecticidal and antimalarial potential of Pseudomonas aeruginosa azurin, highlighting its promise for integrated vector and parasite control. METHODS: The larvicidal activity of azurin was evaluated against Anopheles funestus larvae, with mortality rates a

Shrubs and trees as natural insect protection for grazing animals in Switzerland and the alpine region: A systematic review of in vitro, in vivo and clinical trials.

Insect infestation in grazing animals is an increasing problem due to factors such as global warming and increasing resistance to insecticides, which have a direct impact on animal health and welfare. According to reports from farmers, observations in zoopharmacognosy and the ingredients of commercial insecticides, various indigenous trees and shrubs with an insecticidal or repellent effect grow or can be planted on pastures. The aim of our systematic review (designed according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) statement) was to identify perenni

Куркумин влияет на синтез хитина в Aedes aegypti: вычислительное и экспериментальное исследование.

На протяжении всей истории трансмиссивые заболевания неизменно создавали серьезные проблемы для здоровья человека. В рамках стратегий борьбы с переносчиками химических инсектицидов с момента их создания широко применяются. Тем не менее их эффективность постоянно подрывается устойчивым ростом резистентности к инсектицидам среди этих переносчиков. Спрос на более надежные, эффективные и рентабельные природные инсектициды как таковые становится все более насущным. Одним из многообещающих направлений исследований является шитин, который является важнейшим структурным компонентом экзоскелетов комаро

Совпадение в аннотации оригинала
Throughout history, vector-borne diseases have consistently posed significant challenges to human health. Among the strategies for vector control, chemical insecticides have seen widespread use since their inception. Nevertheless, their effectiveness is continually undermined by the steady growth of insecticide resistance within these vector populations. As …

An examination of the effect of aerosolized Permanone insecticide on zebra finch susceptibility to West Nile virus.

West Nile virus (WNV) is maintained cryptically primarily in avian (passerine) populations, where it is transmitted by Culex spp. mosquitoes. Mosquito-control measures currently include physical activities to reduce mosquito-breeding sites and the application of mosquito larvicides or aerosolized insecticides to kill adults (adulticides) when arboviral diseases such as WNV or Zika virus are detected in mosquito populations. Organochlorine, organophosphorus, carbamate, and pyrethroid insecticides are often used. Previous work suggests an effect of pyrethroids on the immune system in a variety o

The DMPA secreted by the pitcher of Nepenthes × ventrata demonstrates insecticidal activity against a range of insect pests.

The prolonged use of traditional chemical pesticides has led to the emergence of resistance in pest populations, and the discovery of bioactive compounds with novel insecticidal mechanisms offers a promising strategy to broaden the current repertoire of pest management approaches. Natural compounds derived from plants constitute a vast resource for the development of novel pesticides. As a carnivorous plant, Nepenthes × ventrata is capable of secreting a diverse array of compounds that serve to attract and digest insects. In this study, the volatile organic compounds (VOCs) emitted by N. × ven

N-substituted methyl maleamates as larvicidal compounds against Aedes aegypti (Diptera: Culicidae).

Severe human arboviral diseases can be transmitted by the mosquito Aedes aegypti (L.), including dengue, chikungunya, zika, and yellow fever. The use of larvicides in containers that can result as potential breeding places and cannot be eliminated is the main alternative in control programs. However, their continuous and widespread use caused an increase in insecticide-resistant populations of this mosquito. The aim of this study was to evaluate the effect of three N-substituted methyl maleamates as larvicides on Ae. aegypti, the N-propyl methyl maleamate (PMM), N-butyl methyl maleamate (BMM),