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PubMed Journals Articles About "Manipulating Mosquito Tolerance Arbovirus Control" - Page: 3 RSS

21:35 EST 22nd November 2019 | BioPortfolio

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Showing "Manipulating Mosquito Tolerance Arbovirus Control" PubMed Articles 51–75 of 17,000+

Vector Mosquito Surveillance Using Centers For Disease Control and Prevention Autocidal Gravid Ovitraps In San Antonio, Texas.

Mosquito surveillance in large urban areas of the southern USA that border Mexico has become increasingly important due to recent transmission of Zika virus and chikungunya virus in the Americas as well as the continued threat of dengue and West Nile viruses. The vectors of these viruses, , , and , co-occur in residential areas, requiring vector control entities to deploy several different trap types, often expensive and labor-intensive, to surveil these ecologically different species. We evaluated the use ...


Assessing dengue control in Tokyo, 2014.

In summer 2014, an autochthonous outbreak of dengue occurred in Tokyo, Japan, in which Yoyogi Park acted as the focal area of transmission. Recognizing the outbreak, concerted efforts were made to control viral spread, which included mosquito control, public announcement of the outbreak, and a total ban on entering the park. We sought to assess the effectiveness of these control measures.

Curious entanglements: interactions between mosquitoes, their microbiota, and arboviruses.

Mosquitoes naturally harbor a diverse community of microorganisms that play a crucial role in their biology. Mosquito-microbiota interactions are abundant and complex. They can dramatically alter the mosquito immune response, and impede or enhance a mosquito's ability to transmit medically important arboviral pathogens. Yet critically, given the massive public health impact of arboviral disease, few such interactions have been well characterized. In this review, we describe the current state of knowledge of...


Invasive mosquitoes in Switzerland: current situation.

Switzerland is now home to three invasive alien mosquito species: Aedes albopictus (tiger mosquito), Ae. japonicus (Japanese mosquito) and Ae. koreicus (Korean mosquito). The most important is the tiger mosquito that arrived in Ticino in 2003. Active during the day, it is known to be the vector of dengue fever, chikungunya, Zika virus and filaria of the genus Dirofilaria. Since 2013 it has been discovered in north of the Alps. Its progress continues and it will soon reach French-speaking Switzerland. The Co...

Diversity Of Mosquito Species Ovipositing In Different Zones of Light Intensity Within Limestone Caves In Thailand.

Climate change and human activity affect the geographical and annual distribution and population abundance of mosquitoes. As natural habitats are reduced, it is hypothesized that mosquitoes may seek refuge in more stable environments such as cave habitats. Therefore, we explored the species diversity of mosquitoes exploiting cave habitats in Thailand. Ten species belonging to 4 genera were collected, of which none were considered to be true cave-dwelling species (Troglobiont). The known cavernicolous specie...

Use of age-stage structural models to seek optimal Wolbachia-infected male mosquito releases for mosquito-borne disease control.

Due to the lack of vaccines and effective clinical cures, current methods to control mosquito-borne viral diseases such as dengue and Zika are primarily targeting to eradicate the major mosquito vectors. However, traditional means, including larval source reduction and applications of insecticides etc, are not sufficient to keep vector population density below the epidemic risk threshold. An innovative and operational strategy is to release Wolbachia-infected male mosquitoes into wild areas to sterilize wil...

Pathogen blocking in Wolbachia-infected Aedes aegypti is not affected by Zika and dengue virus co-infection.

Wolbachia's ability to restrict arbovirus transmission makes it a promising tool to combat mosquito-transmitted diseases. Wolbachia-infected Aedes aegypti are currently being released in locations such as Brazil, which regularly experience concurrent outbreaks of different arboviruses. A. aegypti can become co-infected with, and transmit multiple arboviruses with one bite, which can complicate patient diagnosis and treatment.

2019 AMCA Memorial Lecture Honoree: William Richard Opp 1942-2017 A Life Well Lived Helping Others.

Since 1979 more than 40 individuals have been recognized for their lifetime achievements in the AMCA Memorial Lecture. These individuals have included luminaries such as Carlos Finlay, Leland Osian Howard, William Herms, Andy Spielman, and, most recently, Fred Knapp (2018). Only one of these individuals recognized, Harold Gray in 1987, was an engineer. Engineers are problem solvers, and mosquito control is, most assuredly, an enterprise fraught with problems. Thus, the selection of William R. Opp as the 201...

New National Record for from Kuwait.

Mosquitoes can transmit a wide variety of viral and parasitic pathogens. Several species have recently been reported in new locations throughout the Arabian Peninsula as a result of entomological surveillance by the US military. We report a new national record for from Kuwait based on morphologic and molecular identification of captured samples. This mosquito might pose a public health threat to local populations and to military personnel as a potential vector of both Sindbis and West Nile viruses.

Contrasting the value of targeted versus area-wide mosquito control scenarios to limit arbovirus transmission with human mobility patterns based on different tropical urban population centers.

Vector control is still our primary intervention for both prevention and mitigation of epidemics of many vector-borne diseases. Efficiently targeting control measures is important since control can involve substantial economic costs. Targeting is not always straightforward, as transmission of vector-borne diseases is affected by various types of host movement. Here we assess how taking daily commuting patterns into consideration can help improve vector control efforts. We examine three tropical urban center...

2019 AMCA Presidential Address: The Times They are A-Changin'.

The influence of weather and weather variability on mosquito abundance and infection with West Nile virus in Harris County, Texas, USA.

Early warning systems for vector-borne diseases (VBDs) prediction are an ecological application where data from the interface of several environmental components can be used to predict future VBD transmission. In general, models for early warning systems only consider average environmental conditions ignoring variation in weather variables, despite the prediction from Schmalhausen's law about the importance of environmental variability for biological systems. We present results from a long-term mosquito sur...

Mosquito exposure and malaria morbidity; a micro-level analysis of household mosquito populations and malaria in a population-based longitudinal cohort in western Kenya.

Malaria morbidity is highly overdispersed in the population. Fine-scale differences in mosquito exposure may partially explain this heterogeneity. However, exposure variability has not been related to individual malaria outcomes.

2018 AMCA Memorial Lecture Honoree: Fred William Knapp .

Discovery of Cocirculating Ross River Virus and Barmah Forest Virus At Wide Bay Military Training Area, Northeastern Australia.

An arbovirus surveillance military exercise was conducted to assess the risk of Ross River virus (RRV) and Barmah Forest virus (BFV) in the Australian Defence Force (ADF) Wide Bay training area (WBTA), northeastern Australia, in April 2018. Of the 5,540 female mosquitoes collected, 3,702 were screened for RRV and BFV by quantitative reverse transcription-polymerase chain reaction in a field laboratory. One pool of was positive for RRV and 8 pools (7 pools of and 1 pool of ) were positive for BFV. Phylogen...

Excito-repellent activity of β-caryophyllene oxide against Aedes aegypti and Anopheles minimus.

Contact irritant and non-contact repellent activities of β-caryophyllene oxide were evaluated against laboratory strains of female Aedes aegypti (USDA strain), a major arbovirus vector and Anopheles minimus (KU strain), a major malaria parasite vector, compared with the synthetic repellent DEET, using an excito-repellency test system. β-caryophyllene oxide and DEET were tested at concentrations of 0.1, 0.25, 0.5 and 1.0% (v/v). Anopheles minimus was found to be more sensitive to β-caryophyllene oxide tha...

Field Efficacy Trials of Aerial Ultra-Low-Volume Application of Insecticides Against Caged in Mexico.

We evaluated the efficacy of aerial ultra-low-volume (ULV) insecticide spraying in field bioassays with caged in May 2017 in Puerto Vallarta, Jalisco, Mexico. The insecticides tested included an organophosphate (Mosquitocida UNO ULV) and a neonicotinoid-pyrethroid combination (Cielo). Two populations were evaluated: a field pyrethroid-resistant local strain (Puerto Vallarta) and an insecticide-susceptible laboratory strain (New Orleans). Knockdown after 1 h by both products was ≥97.0%, and mortality aft...

CXCR5PD-1 follicular helper CD8 T cells control B cell tolerance.

Many autoimmune diseases are characterized by the production of autoantibodies. The current view is that CD4 T follicular helper (Tfh) cells are the main subset regulating autoreactive B cells. Here we report a CXCR5PD1 Tfh subset of CD8 T cells whose development and function are negatively modulated by Stat5. These CD8 Tfh cells regulate the germinal center B cell response and control autoantibody production, as deficiency of Stat5 in CD8 T cells leads to an increase of CD8 Tfh cells, resulting in the brea...

Characterization of a yeast interfering RNA larvicide with a target site conserved in the synaptotagmin gene of multiple disease vector mosquitoes.

New mosquito control strategies are vitally needed to address established and emerging arthropod-borne infectious diseases. Here we describe the characterization of a yeast interfering RNA larvicide that was developed through the genetic engineering of Saccharomyces cerevisiae (baker's yeast) to express a short hairpin RNA targeting the Aedes aegypti synaptotagmin (Aae syt) gene. The larvicide effectively silences the Aae syt gene, causes defects at the larval neural synapse, and induces high rates of A. ae...

Semi-Field Evaluation of Modified 00ZZZero Traps with Sticky Paper to Increase the Collection Efficacy of Gravid .

The 00ZZZero trap (0Z) is a small black plastic container with permethrin and pyriproxyfen, designed and marketed to both attract and kill gravid mosquitoes (unmodified trap ([UMT] or modified trap [MT]). The 0Z trap without the insecticide was modified with addition of a sticky paper, coated with an adhesive glue (MT) and evaluated for collection efficacy of released gravid mosquito, (L.) in outdoor screened enclosures in St. Augustine, in northeastern Florida. The mean numbers (±SE) of mosquitoes caugh...

New County Records of and in Colorado.

In August and September 2017, we conducted mosquito surveillance in southeastern Colorado by using ovitraps and larval sampling. The aim was to determine if there were established populations of and in the region. A single female was reared from eggs collected in La Junta, CO, but was not detected. Three other species were reared from eggs and/or larvae: , , and and were detected for the 1st time in Otero and Baca counties, respectively, and these became new county records for Colorado. Both species w...

Standardized Back Checks of Catch Basin Larvicides Across Three Modes of Action in the North Shore Suburbs of Chicago, USA.

During June through September 2018, the North Shore Mosquito Abatement District evaluated a quality control protocol for larvicide-treated catch basins that allowed for comparisons of larvicides with different modes of action. Results suggest that when applied at a rate of 2 tablespoons (approximately 20 g of product) per basin, these larvicides (VectoLex FG , Natular™ G30 Spinosad, and Altosid Pellets Methoprene) could reduce the need for retreatment for up to 4 wk or longer. Using this same protocol, Sp...

New Record of In A Suburban Area Of Merida, Yucatan, Mexico.

A survey was carried out in 51 households within a suburban area of Merida, Yucatan, Mexico, for 5 consecutive days. Adult collections were performed using Prokopack aspirators (indoors) and human-landing mosquito catches (HLC) outdoors, and larval sites (artificial containers) were revised for larvae collection. A total of 259 were collected, 246 from artificial larval sites, 8 by indoor aspiration, and 5 by HLC. This is the first record of in Merida, Yucatan, Mexico.

Sodium Ascorbate as a Potential Toxicant in Attractive Sugar Baits for Control of Adult Mosquitoes (Diptera: Culicidae) and Sand Flies (Diptera: Psychodidae).

Attractive toxic sugar baits (ATSBs) can be an effective vector control tool, especially in areas where aerial or aquatic applications of pesticides are undesirable or impractical. In general, there is a need to develop novel or alternative insecticides for vector control, and there is a demand from consumers for more 'natural' pest control products. Sodium ascorbate (SA) is a naturally occurring antioxidant compound, found in fruits and vegetables, and is available commercially in the United States as a fo...

Dispersal of the Mosquito Aedes vigilax (Diptera: Culicidae) From Urban Estuarine Wetlands in Sydney, Australia.

Aedes vigilax (Skuse) is a pest and vector species associated with coastal wetlands and the abundance of this mosquito has been identified as contributing to increased risk of mosquito-borne disease outbreaks. As urban development continues to encroach on these coastal wetlands, pest and public health impacts are becoming of increasing concern and in the absence of broadscale mosquito control. Urban planners are looking to buffer zones and other land use planning options to minimize contact between mosquito...


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