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https://www.readbyqxmd.com/read/29166650/feeding-induced-changes-in-allatostatin-a-and-short-neuropeptide-f-in-the-antennal-lobes-affect-odor-mediated-host-seeking-in-the-yellow-fever-mosquito-aedes-aegypti
#1
Peter Christ, Anna Reifenrath, Jörg Kahnt, Frank Hauser, Sharon Rose Hill, Joachim Schachtner, Rickard Ignell
Aedes aegypti is a model species in which the endogenous regulation of odor-mediated host seeking behavior has received some attention. Sugar feeding and host seeking in female A. aegypti are transiently inhibited following a blood meal. This inhibition is partially mediated by short neuropeptide F (sNPF). The paired antennal lobes (ALs), as the first processing centers for olfactory information, has been shown to play a significant role in the neuropeptidergic regulation of odor-mediated behaviors in insects...
2017: PloS One
https://www.readbyqxmd.com/read/29165845/wolbachia-infection-alters-the-relative-abundance-of-resident-bacteria-in-adult-aedes-aegypti-mosquitoes-but-not-larvae
#2
Michelle D Audsley, Andrei Seleznev, D Albert Joubert, Megan Woolfit, Scott L O'Neill, Elizabeth A McGraw
Insect-symbiont interactions are known to play key roles in host functions and fitness. The common insect endosymbiont Wolbachia can reduce the ability of several human pathogens, including arboviruses and the malaria parasite, to replicate in insect hosts. Wolbachia does not naturally infect Aedes aegypti, the primary vector of dengue virus, but transinfected Ae. aegypti have anti-dengue virus properties and are currently being trialled as a dengue biocontrol strategy. Here, we assess the impact of Wolbachia infection of Ae...
November 22, 2017: Molecular Ecology
https://www.readbyqxmd.com/read/29165810/insecticide-susceptibility-status-in-mexican-populations-of-stegomyia-aegypti-%C3%A2-aedes-aegypti-a-nationwide-assessment
#3
P A Kuri-Morales, F Correa-Morales, C González-Acosta, M Moreno-Garcia, R Santos-Luna, S Román-Pérez, F Salazar-Penagos, M Lombera-González, G Sánchez-Tejeda, J F González-Roldán
In Mexico, mosquito vector-borne diseases are of public health concern as a result of their impact on human morbidity and mortality. The use of insecticides against adult mosquitoes is one of the most common ways of controlling mosquito population densities. However, the use of these compounds has resulted in the development of insecticide resistance. The aim of this study was to estimate susceptibility to six pyrethroids, two carbamates and two organophosphates in Mexican populations of Stegomyia aegypti (Linnaeus, 1762) (= Aedes aegypti) (Diptera: Culicidae) mosquitoes...
November 22, 2017: Medical and Veterinary Entomology
https://www.readbyqxmd.com/read/29164802/use-of-bacillus-thuringiensis-israelensis-in-integrated-vector-control-of-aedes-sp-in-sri-lanka-a-prospective-controlled-effectiveness-study
#4
H A Tissera, P C Samaraweera, B D W Jayamanne, M D S Janaki, M P P U Chulasiri, C Rodrigo, S D Fernando
OBJECTIVES: The annual incidence of dengue has been increasing over the last few years in Sri Lanka with seasonal epidemics. Biological control of the vector has not been part of the integrated vector control implemented by the public health authorities of Sri Lanka so far. This pilot study assessed the effectiveness of using Bacillus thuringiensis israelensis (Bti) spray to control the Aedes mosquito vector population density. METHODS: Prospective controlled effectiveness study in 3 administrative divisions of Colombo...
November 22, 2017: Tropical Medicine & International Health: TM & IH
https://www.readbyqxmd.com/read/29164098/the-highs-and-lows-of-making-a-bucket-list-quantifying-potential-mosquito-breeding-habitats-in-metropolitan-backyards
#5
Ram Sharan Lamichhane, Peter J Neville, Jacques Oosthuizen, Kim Clark, Samir Mainali, Maria Fatouros, Shelley Beatty
While the development of land for residential housing along the Swan and Canning Rivers in Perth, WA, Australia has reduced natural mosquito breeding sites, the role of backyard container breeding remains a relatively unknown factor. Local Governments responsible for these areas focus management and control efforts on low lying, tidally driven mosquito habitats to control Aedes vigilax (Skuse) and Aedes camptorhynchus (Thomson) mosquitoes in an effort to reduce both the nuisance and disease risk to residents...
2017: Frontiers in Public Health
https://www.readbyqxmd.com/read/29164092/the-nuisance-mosquito-anopheles-plumbeus-stephens-1828-in-germany-a-questionnaire-survey-may-help-support-surveillance-and-control
#6
Eva C Heym, Jette Schröder, Helge Kampen, Doreen Walther
The mosquito species Anopheles plumbeus is an aggressive biter and a potential vector of malaria parasites and West Nile virus. It occurs naturally at low population densities, as its larval development is adapted to the specific water qualities found in tree holes. However, probably owing to environmental changes, it has recently been observed in several European countries to use increasingly often artificial breeding habitats that may lead to mass development and severe annoyance to humans living close by...
2017: Frontiers in Public Health
https://www.readbyqxmd.com/read/29163159/larvicidal-histopathological-efficacy-of-penicillium-daleae-against-larvae-of-culex-quinquefasciatus-and-aedes-aegypti-plus-biotoxicity-on-artemia-nauplii-a-non-target-aquatic-organism
#7
C Ragavendran, T Mariappan, Devarajan Natarajan
Mosquitoes can transmit the terrible diseases to human beings. Soil-borne fungal products act as potential source for low-cost chemicals, used for developing eco-friendly control agents against mosquito-vector borne diseases. The prime aim of study was to check the larvicidal potential of fungus mycelia (by ethyl acetate solvent) extract from Penicillium daleae (KX387370) against Culex quinquefasciatus and Aedes aegypti and to test the toxicity of brine shrimp Artemia nauplii, by observing the physiological activity...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/29162827/intranasal-infection-and-contact-transmission-of-zika-virus-in-guinea-pigs
#8
Yong-Qiang Deng, Na-Na Zhang, Xiao-Feng Li, Ya-Qing Wang, Min Tian, Ye-Feng Qiu, Jun-Wan Fan, Jia-Nan Hao, Xing-Yao Huang, Hao-Long Dong, Hang Fan, Yu-Guang Wang, Fu-Chun Zhang, Yi-Gang Tong, Zhiheng Xu, Cheng-Feng Qin
Zika virus (ZIKV) is primarily transmitted to humans through mosquito bites or sexual contact. The excretion and persistence of contagious ZIKV in various body fluids have been well documented in ZIKV patients; however, the risk of direct contact exposure remains unclear. Here, we show that guinea pigs are susceptible to ZIKV infection via subcutaneous inoculation route; infected guinea pigs exhibit seroconversion and significant viral secretion in sera, saliva, and tears. Notably, ZIKV is efficiently transmitted from infected guinea pigs to naïve co-caged animals...
November 21, 2017: Nature Communications
https://www.readbyqxmd.com/read/29162120/a-village-level-cluster-randomized-entomological-evaluation-of-combination-long-lasting-insecticidal-nets-containing-pyrethroid-plus-pbo-synergist-in-southern-mali
#9
Moussa B M Cisse, Djibril Sangare, Richard M Oxborough, Abdourhamane Dicko, Dereje Dengela, Aboubacar Sadou, Jules Mihigo, Kristen George, Laura Norris, Christen Fornadel
BACKGROUND: There is growing concern that malaria vector resistance to pyrethroid insecticides may reduce the effectiveness of long-lasting insecticidal nets (LLINs). Combination LLINs are designed to control susceptible and pyrethroid-resistant mosquito populations through a mixture of pyrethroid with piperonyl butoxide (PBO) synergist. A cluster randomized trial with entomology outcome measures was conducted in Mali to determine the added benefit over mono-treated pyrethroid predecessors...
November 21, 2017: Malaria Journal
https://www.readbyqxmd.com/read/29162113/determination-of-the-residual-efficacy-of-carbamate-and-organophosphate-insecticides-used-for-indoor-residual-spraying-for-malaria-control-in-ethiopia
#10
Delenasaw Yewhalaw, Meshesha Balkew, Josephat Shililu, Sultan Suleman, Alemayehu Getachew, Gedeon Ashenbo, Sheleme Chibsa, Gunawardena Dissanayake, Kristen George, Dereje Dengela, Yemane Ye-Ebiyo, Seth R Irish
BACKGROUND: Indoor residual spraying is one of the key vector control interventions for malaria control in Ethiopia. As malaria transmission is seasonal in most parts of Ethiopia, a single round of spraying can usually provide effective protection against malaria, provided the insecticide remains effective over the entire malaria transmission season. This experiment was designed to evaluate the residual efficacy of bendiocarb, pirimiphos-methyl, and two doses of propoxur on four different wall surfaces (rough mud, smooth mud, dung, and paint)...
November 21, 2017: Malaria Journal
https://www.readbyqxmd.com/read/29162101/ivermectin-susceptibility-sporontocidal-effect-and-inhibition-of-time-to-re-feed-in-the-amazonian-malaria-vector-anopheles-darlingi
#11
Kevin C Kobylinski, Karín S Escobedo-Vargas, Victor M López-Sifuentes, Salomón Durand, Edward S Smith, G Christian Baldeviano, Robert V Gerbasi, Sara-Blythe Ballard, Craig A Stoops, Gissella M Vásquez
BACKGROUND: Outdoor malaria transmission hinders malaria elimination efforts in the Amazon region and novel vector control tools are needed. Ivermectin mass drug administration (MDA) to humans kills wild Anopheles, targets outdoor-feeding vectors, and can suppress malaria parasite transmission. Laboratory investigations were performed to determine ivermectin susceptibility, sporontocidal effect and inhibition of time to re-feed for the primary Amazonian malaria vector, Anopheles darlingi...
November 21, 2017: Malaria Journal
https://www.readbyqxmd.com/read/29162098/malaria-early-warning-tool-linking-inter-annual-climate-and-malaria-variability-in-northern-guadalcanal-solomon-islands
#12
Jason Smith, Lloyd Tahani, Albino Bobogare, Hugo Bugoro, Francis Otto, George Fafale, David Hiriasa, Adna Kazazic, Grant Beard, Amanda Amjadali, Isabelle Jeanne
BACKGROUND: Malaria control remains a significant challenge in the Solomon Islands. Despite progress made by local malaria control agencies over the past decade, case rates remain high in some areas of the country. Studies from around the world have confirmed important links between climate and malaria transmission. This study focuses on understanding the links between malaria and climate in Guadalcanal, Solomon Islands, with a view towards developing a climate-based monitoring and early warning for periods of enhanced malaria transmission...
November 21, 2017: Malaria Journal
https://www.readbyqxmd.com/read/29162093/receptivity-to-malaria-in-the-china-myanmar-border-in-yingjiang-county-yunnan-province-china
#13
Tianmu Chen, Shaosen Zhang, Shui-Sen Zhou, Xuezhong Wang, Chunhai Luo, Xucan Zeng, Xiangrui Guo, Zurui Lin, Hong Tu, Xiaodong Sun, Hongning Zhou
BACKGROUND: The re-establishment of malaria has become an important public health issue in and out of China, and receptivity to this disease is key to its re-emergence. Yingjiang is one of the few counties with locally acquired malaria cases in the China-Myanmar border in China. This study aimed to understand receptivity to malaria in Yingjiang County, China, from June to October 2016. METHODS: Light-traps were employed to capture the mosquitoes in 17 villages in eight towns which were categorized into four elevation levels: level 1, 0-599 m; level 2, 600-1199 m; level 3, 1200-1799 m; and level 4, > 1800 m...
November 21, 2017: Malaria Journal
https://www.readbyqxmd.com/read/29161848/complex-wolbachia-infection-dynamics-in-mosquitoes-with-imperfect-maternal-transmission
#14
Bo Zheng, Wenliang Guo, Linchao Hu, Mugen Huang, Jianshe Yu
Dengue, malaria, and Zika are dangerous diseases primarily transmitted by Aedes aegypti, Aedes albopictus, and Anopheles stephensi. In the last few years, a new disease control method, besides pesticide spraying to kill mosquitoes, has been developed by releasing mosquitoes carrying bacterium Wolbachia into the natural areas to infect the wild population of mosquitoes and block disease transmission. The bacterium is transmitted by infected mothers and the maternal transmission was assumed to be perfect in virtually all previous models...
April 1, 2018: Mathematical Biosciences and Engineering: MBE
https://www.readbyqxmd.com/read/29161844/a-network-model-for-control-of-dengue-epidemic-using-sterile-insect-technique
#15
Arti Mishra, Benjamin Ambrosio, Sunita Gakkhar, M A Aziz-Alaoui
In this paper, a network model has been proposed to control dengue disease transmission considering host-vector dynamics in n patches. The control of mosquitoes is performed by SIT. In SIT, the male insects are sterilized in the laboratory and released into the environment to control the number of offsprings. The basic reproduction number has been computed. The existence and stability of various states have been discussed. The bifurcation diagram has been plotted to show the existence and stability regions of disease-free and endemic states for an isolated patch...
April 1, 2018: Mathematical Biosciences and Engineering: MBE
https://www.readbyqxmd.com/read/29161827/mathematical-analysis-of-a-weather-driven-model-for-the-population-ecology-of-mosquitoes
#16
Kamaldeen Okuneye, Ahmed Abdelrazec, Abba B Gumel
A new deterministic model for the population biology of immature and mature mosquitoes is designed and used to assess the impact of temperature and rainfall on the abundance of mosquitoes in a community. The trivial equilibrium of the model is globally-asymptotically stable when the associated vectorial reproduction number (R0) is less than unity. In the absence of density-dependence mortality in the larval stage, the autonomous version of the model has a unique and globally-asymptotically stable non-trivial equilibrium whenever 1 andlt;R0 andlt;RC0 (this equilibrium bifurcates into a limit cycle, via a Hopf bifurcation at R0=RC0)...
February 1, 2018: Mathematical Biosciences and Engineering: MBE
https://www.readbyqxmd.com/read/29161495/essential-oils-and-their-components-as-an-alternative-in-the-control-of-mosquito-vectors-of-disease
#17
Sergio Andrade Ochoa, Luvia E Sánchez-Torres, Guadalupe Virginia Nevárez-Moorillón, Alejandro D Camacho, Benjamín Nogueda-Torres
More than half of the human population is exposed to mosquito-borne infections. Climate change and the emergence of strains resistant to traditionally used insecticides have motivated the search of new agents for mosquito population control. Essential oils have been effective repellents and larvicidal agents.The aim of this work was to review research studies conducted in recent years on the larvicidal activity of essential oils and their components against Aedes, Anopheles and Culex mosquitoes, as well as the latest reports about their possible mechanism of action...
March 29, 2017: Biomédica: Revista del Instituto Nacional de Salud
https://www.readbyqxmd.com/read/29161492/bionomics-of-anopheles-nyssorhynchus-albimanus-diptera-culicidae-in-two-villages-of-the-way%C3%A3%C2%BAu-people-riohacha-la-guajira-colombia
#18
Airleth Sofía Díaz, Aura Isabel Sotelo, Catalina González-Uribe, Helena L Brochero
INTRODUCTION: Riohacha, capital of the department of La Guajira, reports the highest rates for malaria in the department, and the most vulnerable people are those of the Wayúu indigenous group. OBJECTIVE: To describe some aspects of the bionomics of the Anopheles species in two Wayúu settlements. MATERIALS AND METHODS: Two sampling events were carried out during dry and rainy seasons in Marbacella and El Horno (Riohacha, La Guajira). Immature stages of Anopheles spp...
March 29, 2017: Biomédica: Revista del Instituto Nacional de Salud
https://www.readbyqxmd.com/read/29161491/dengue-virus-detection-in-aedes-aegypti-larvae-and-pupae-collected-in-rural-areas-of-anapoima-cundinamarca-colombia
#19
Myriam Lucía Velandia-Romero, Víctor Alberto Olano, Carolina Coronel-Ruiz, Laura Cabezas, María Angélica Calderón-Peláez, Jaime Eduardo Castellanos, María Inés Matiz
INTRODUCTION: There is a high incidence and prevalence of dengue in the department of Cundinamarca, and recently Aedes aegypti, the main vector of dengue virus (DENV), was detected in some of its rural areas. OBJECTIVE: To evaluate viral transovarial transmission in larvae and pupae collected in rural areas of the municipality of Anapoima, Cundinamarca. MATERIALS AND METHODS: Live larvae and pupae were collected from 53 homes and later they were taken to the laboratory in Anapoima, where they were classified, pooled and frozen...
March 29, 2017: Biomédica: Revista del Instituto Nacional de Salud
https://www.readbyqxmd.com/read/29161487/virological-surveillance-of-aedes-stegomyia-aegypti-and-aedes-stegomyia-albopictus-as-support-for-decision-making-for-dengue-control-in-medell%C3%A3-n
#20
Juliana Pérez-Pérez, William H Sanabria, Carolina Restrepo, Raúl Rojo, Enrique Henao, Omar Triana, Ana María Mejía, Sandra M Castaño, Guillermo L Rúa-Uribe
INTRODUCTION: Dengue represents an important public health problem in Colombia. No treatment is available and the vaccine has not been approved in all countries, hence, actions should be strengthened to mitigate its impact through the control of Aedes aegypti, the vector mosquito. In Colombia, surveillance is done using entomological indexes and case notification, which is usually informed late, leading to untimely interventions. Viral detection in urban mosquitoes using molecular techniques provides more accurate entomological information for decision-making...
March 29, 2017: Biomédica: Revista del Instituto Nacional de Salud
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