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https://www.readbyqxmd.com/read/28732048/wolbachia-and-dengue-virus-infection-in-the-mosquito-aedes-fluviatilis-diptera-culicidae
#1
Jéssica Barreto Lopes Silva, Debora Magalhães Alves, Vanessa Bottino-Rojas, Thiago Nunes Pereira, Marcos Henrique Ferreira Sorgine, Eric Pearce Caragata, Luciano Andrade Moreira
Dengue represents a serious threat to human health, with billions of people living at risk of the disease. Wolbachia pipientis is a bacterial endosymbiont common to many insect species. Wolbachia transinfections in mosquito disease vectors have great value for disease control given the bacterium's ability to spread into wild mosquito populations, and to interfere with infections of pathogens, such as dengue virus. Aedes fluviatilis is a mosquito with a widespread distribution in Latin America, but its status as a dengue vector has not been clarified...
2017: PloS One
https://www.readbyqxmd.com/read/28731409/assessment-of-the-probability-of-autochthonous-transmission-of-chikungunya-virus-in-canada-under-recent-and-projected-climate-change
#2
Victoria Ng, Aamir Fazil, Philippe Gachon, Guillaume Deuymes, Milka Radojević, Mariola Mascarenhas, Sophiya Garasia, Michael A Johansson, Nicholas H Ogden
BACKGROUND: Chikungunya virus (CHIKV) is a reemerging pathogen transmitted by Aedes aegypti and Aedes albopictus mosquitoes. The ongoing Caribbean outbreak is of concern due to the potential for infected travelers to spread the virus to countries where vectors are present and the population is susceptible. Although there has been no autochthonous transmission of CHIKV in Canada, there is concern that both Ae. albopictus and CHIKV will become established, particularly under projected climate change...
June 5, 2017: Environmental Health Perspectives
https://www.readbyqxmd.com/read/28729328/comparative-safety-of-antiepileptic-drugs-for-neurological-development-in-children-exposed-during-pregnancy-and-breast-feeding-a-systematic-review-and-network-meta-analysis
#3
Areti Angeliki Veroniki, Patricia Rios, Elise Cogo, Sharon E Straus, Yaron Finkelstein, Ryan Kealey, Emily Reynen, Charlene Soobiah, Kednapa Thavorn, Brian Hutton, Brenda R Hemmelgarn, Fatemeh Yazdi, Jennifer D'Souza, Heather MacDonald, Andrea C Tricco
OBJECTIVES: Compare the safety of antiepileptic drugs (AEDs) on neurodevelopment of infants/children exposed in utero or during breast feeding. DESIGN AND SETTING: Systematic review and Bayesian random-effects network meta-analysis (NMA). MEDLINE, EMBASE and the Cochrane Central Register of Controlled Trials were searched until 27 April 2017. Screening, data abstraction and quality appraisal were completed in duplicate by independent reviewers. PARTICIPANTS: 29 cohort studies including 5100 infants/children...
July 20, 2017: BMJ Open
https://www.readbyqxmd.com/read/28728996/conditions-for-success-of-engineered-underdominance-gene-drive-systems
#4
Matthew P Edgington, Luke S Alphey
Engineered underdominance is one of a number of different gene drive strategies that have been proposed for the genetic control of insect vectors of disease. Here we model a two-locus engineered underdominance based gene drive system that is based on the concept of mutually suppressing lethals. In such a system two genetic constructs are introduced, each possessing a lethal element and a suppressor of the lethal at the other locus. Specifically, we formulate and analyse a population genetics model of this system to assess when different combinations of release strategies (i...
July 17, 2017: Journal of Theoretical Biology
https://www.readbyqxmd.com/read/28728607/zika-virus-transmission-to-mouse-ear-by-mosquito-bite-a-laboratory-model-that-replicates-the-natural-transmission-process
#5
Nagila Francinete Costa Secundino, Barbara Aparecida Chaves, Alessandra Silva Orfano, Karine Renata Dias Silveira, Nilton Barnabe Rodrigues, Thais Bonifácio Campolina, Rafael Nacif-Pimenta, Luiz Eduardo Martinez Villegas, Breno Melo Silva, Marcus Vinícius Guimarães Lacerda, Douglas Eric Norris, Paulo Filemon Paolucci Pimenta
BACKGROUND: Zika disease has transformed into a serious global health problem due to the rapid spread of the arbovirus and alarming severity including congenital complications, microcephaly and Guillain-Barré syndrome. Zika virus (ZIKV) is primarily transmitted to humans through the bite of an infective mosquito, with Aedes aegypti being the main vector. METHODS: We successfully developed a ZIKV experimental transmission model by single infectious Ae. aegypti bite to a laboratory mouse using circulating Brazilian strains of both arbovirus and vector...
July 20, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28728045/postdiagnosis-neurological-care-for-patients-with-psychogenic-nonepileptic-spells-pnes
#6
Chloe E Hill, Hannah Schwartz, Nabila Dahodwala, Brian Litt, Kathryn A Davis
OBJECTIVE: This study investigated continuity of neurological care for patients discharged from the epilepsy monitoring unit (EMU) with a diagnosis of psychogenic nonepileptic spells (PNES). Because PNES are seizure-like episodes that cannot be explained by abnormal electrical brain activity, they are challenging for patients to understand and accept. Consequently, after diagnosis, patients commonly fail to start recommended psychotherapy and instead pursue redundant medical care. As consistent relationships with healthcare providers may help, we instituted standard follow-up for patients diagnosed with PNES...
July 17, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/28727779/contemporary-status-of-insecticide-resistance-in-the-major-aedes-vectors-of-arboviruses-infecting-humans
#7
REVIEW
Catherine L Moyes, John Vontas, Ademir J Martins, Lee Ching Ng, Sin Ying Koou, Isabelle Dusfour, Kamaraju Raghavendra, João Pinto, Vincent Corbel, Jean-Philippe David, David Weetman
Both Aedes aegytpi and Ae. albopictus are major vectors of 5 important arboviruses (namely chikungunya virus, dengue virus, Rift Valley fever virus, yellow fever virus, and Zika virus), making these mosquitoes an important factor in the worldwide burden of infectious disease. Vector control using insecticides coupled with larval source reduction is critical to control the transmission of these viruses to humans but is threatened by the emergence of insecticide resistance. Here, we review the available evidence for the geographical distribution of insecticide resistance in these 2 major vectors worldwide and map the data collated for the 4 main classes of neurotoxic insecticide (carbamates, organochlorines, organophosphates, and pyrethroids)...
July 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28727274/the-effect-of-depression-and-side-effects-of-antiepileptic-drugs-on-injuries-in-patients-with-epilepsy
#8
S Gur-Ozmen, M Mula, N Agrawal, H R Cock, D Lozsadi, T J von Oertzen
BACKGROUND AND PURPOSE: People with epilepsy are at increased risk of accidents and injuries but, despite several studies on this subject, data regarding preventable causes are still contradictory. The aim of this study was to investigate the relationship between injuries, side effects of antiepileptic drugs (AEDs) and depression. METHODS: Data from a consecutive sample of adult patients with epilepsy attending the outpatient clinics at St George's University Hospital in London were included...
July 20, 2017: European Journal of Neurology: the Official Journal of the European Federation of Neurological Societies
https://www.readbyqxmd.com/read/28726621/characterization-of-fitzroy-river-virus-and-serologic-evidence-of-human-and-animal-infection
#9
Cheryl A Johansen, Simon H Williams, Lorna F Melville, Jay Nicholson, Roy A Hall, Helle Bielefeldt-Ohmann, Natalie A Prow, Glenys R Chidlow, Shani Wong, Rohini Sinha, David T Williams, W Ian Lipkin, David W Smith
In northern Western Australia in 2011 and 2012, surveillance detected a novel arbovirus in mosquitoes. Genetic and phenotypic analyses confirmed that the new flavivirus, named Fitzroy River virus, is related to Sepik virus and Wesselsbron virus, in the yellow fever virus group. Most (81%) isolates came from Aedes normanensis mosquitoes, providing circumstantial evidence of the probable vector. In cell culture, Fitzroy River virus replicated in mosquito (C6/36), mammalian (Vero, PSEK, and BSR), and avian (DF-1) cells...
August 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28725142/rhanterium-epapposum-oliv-essential-oil-chemical-composition-and-antimicrobial-insect-repellent-and-anticholinesterase-activities
#10
Betul Demirci, Hasan Soliman Yusufoglu, Nurhayat Tabanca, Halide Edip Temel, Ulrich R Bernier, Natasha M Agramonte, Saleh Ibrahim Alqasoumi, Adnan Jathlan Al-Rehaily, Kemal Husnu Can Başer, Fatih Demirci
The essential oil (EO) of the aerial parts of Rhanterium epapposum Oliv. (Asteraceae), was obtained by hydrodistillation. The oil was subsequently analyzed by both GC-FID and GC-MS, simultaneously. Forty-five components representing 99.2% of the oil composition were identified. The most abundant compounds were camphene (38.5%), myrcene (17.5%), limonene (10.1%) and α-pinene (8.7%). Referring to the ethnobotanical utilization, an insecticidal assay was performed, where the oil repelled the yellow fever mosquito Aedes aegypti L...
July 2017: Saudi Pharmaceutical Journal: SPJ: the Official Publication of the Saudi Pharmaceutical Society
https://www.readbyqxmd.com/read/28724972/asymptomatic-transmission-and-the-dynamics-of-zika-infection
#11
Seyed M Moghadas, Affan Shoukat, Aquino L Espindola, Rafael S Pereira, Fatima Abdirizak, Marek Laskowski, Cecile Viboud, Gerardo Chowell
Following the 2013-14 outbreak in French Polynesia, the Zika virus (ZIKV) epidemic spread widely to many countries where Aedes Aegypti as the main transmitting vector is endemic. The lack of a second wave of ZIKV infection in most affected regions may suggest that a sufficiently high level of herd immunity was reached during the first wave. We developed an agent-based transmission model to investigate the role of asymptomatic infection on the likelihood of observing a second wave, while accounting for its relative transmissibility...
July 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28721105/prediction-of-efficacy-for-conversion-from-adjunctive-therapy-to-monotherapy-with-eslicarbazepine-acetate-800-mg-once-daily-for-partial-onset-epilepsy
#12
Soujanya Sunkaraneni, Julie A Passarell, Elizabeth A Ludwig, Jill Fiedler-Kelly, Janet K Pitner, Todd A Grinnell, David Blum
PURPOSE: Eslicarbazepine acetate (ESL) is a once-daily (QD) oral antiepileptic drug (AED) indicated for partial-onset seizures (POS). Clinical studies of gradual conversion to ESL 1,200 and 1,600 mg QD monotherapies were previously conducted in patients with POS who were not well-controlled by 1 or 2 AEDs. This report describes modeling and simulation of plasma eslicarbazepine (primary active metabolite of ESL) concentrations and time to monotherapy study exit to predict efficacy for conversion to ESL monotherapy at a lower dose of 800 mg, as an option for patients requiring or not tolerating higher doses since this regimen is effective in adjunctive therapy for POS...
2017: Clinical Pharmacology: Advances and Applications
https://www.readbyqxmd.com/read/28720490/first-record-of-natural-vertical-transmission-of-dengue-virus-in-aedes-aegypti-from-cuba
#13
Gladys Gutiérrez-Bugallo, Rosmari Rodriguez-Roche, Gisell Díaz, Antonio A Vázquez, Mayling Alvarez, Magdalena Rodríguez, Juan A Bisset, Maria G Guzman
While horizontal transmission (human-mosquito-human) of dengue viruses largely determines the epidemiology of the disease, vertical transmission (infected female mosquito- infected offspring) has been suggested as a mechanism that ensures maintenance of the virus during adverse conditions for horizontal transmission to occur. The purpose of this study was to analyze the natural infection of larval stages of Aedes aegypti (Diptera: Culicidae) with the dengue virus (DENV) in Cuba. Here, we report vertical transmission of DENV-3 genotype III in natural populations of Ae...
July 15, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28719335/experimental-infection-with-and-maintenance-of-cell-fusing-agent-virus-flavivirus-in-aedes-aegypti
#14
Maria Angelica Contreras-Gutierrez, Hilda Guzman, Saravanan Thangamani, Nikos Vasilakis, Robert B Tesh
During the past two decades, there has been a dramatic increase in the recognition and characterization of novel insect-specific flaviviruses (ISFVs). Some of these agents are closely related to important mosquito-borne flavivirus pathogens. Results of experimental studies suggest that mosquitoes and mosquito cell cultures infected with some ISFVs are refractory to superinfection with related flavivirus pathogens; and it has been proposed that ISFVs potentially could be used to alter the vector competence of mosquitoes and reduce transmission of specific flavivirus pathogens, such as dengue, West Nile, or Zika viruses...
July 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28719283/american-aedes-vexans-mosquitoes-are-competent-vectors-of-zika-virus
#15
Alex Gendernalik, James Weger-Lucarelli, Selene M Garcia Luna, Joseph R Fauver, Claudia Rückert, Reyes A Murrieta, Nicholas Bergren, Demitrios Samaras, Chilinh Nguyen, Rebekah C Kading, Gregory D Ebel
AbstractStarting in 2013-2014, the Americas have experienced a massive outbreak of Zika virus (ZIKV) which has now reached at least 49 countries. Although most cases have occurred in South America and the Caribbean, imported and autochthonous cases have occurred in the United States. Aedes aegypti and Aedes albopictus mosquitoes are known vectors of ZIKV. Little is known about the potential for temperate Aedes mosquitoes to transmit ZIKV. Aedes vexans has a worldwide distribution, is highly abundant in particular localities, aggressively bites humans, and is a competent vector of several arboviruses...
June 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28719255/patient-reported-adverse-effects-associated-with-combination-antiretroviral-therapy-and-coadministered-enzyme-inducing-antiepileptic-drugs
#16
Melissa A Elafros, Gretchen L Birbeck, Joseph C Gardiner, Omar K Siddiqi, Izukanji Sikazwe, Nigel Paneth, Christopher M Bositis, Jason F Okulicz
AbstractConcurrent treatment with combination antiretroviral therapy (cART) and an enzyme-inducing antiepileptic drug (EI-AED) is common in resource-limited settings; however, the incidence and impact of adverse effects in cotreated patients is largely unknown. Symptoms of adverse effects were assessed by both spontaneous report and checklist for 145 human immunodeficiency virus (HIV)-infected Zambian adults initiating various treatment combinations, such as cART with an EI-AED (N = 20), cART only (N = 43), or neither drug (untreated; N = 82)...
June 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28718976/low-density-lipopolyprotein-inhibits-flavivirus-acquisition-in-aedes-aegypti
#17
Z L Wagar, M O Tree, M C Mpoy, M J Conway
Aedes aegypti is the primary vector of a number of human pathogens including dengue virus (DENV) and Zika virus (ZIKV). Ae. aegypti acquires these viruses during the processing of bloodmeals obtained from an infected vertebrate host. Vertebrate blood contains a number of factors that have the potential to modify virus acquisition in the mosquito. Interestingly, low density lipopolyprotein (LDL) levels are decreased during severe DENV infection. Accordingly, we hypothesized that LDL is a modifiable factor that can influence flavivirus acquisition in the mosquito...
July 18, 2017: Insect Molecular Biology
https://www.readbyqxmd.com/read/28717415/chronic-antiepileptic-drug-use-and-functional-network-efficiency-a-functional-magnetic-resonance-imaging-study
#18
Tamar M van Veenendaal, Dominique M IJff, Albert P Aldenkamp, Richard H C Lazeron, Paul A M Hofman, Anton J A de Louw, Walter H Backes, Jacobus F A Jansen
AIM: To increase our insight in the neuronal mechanisms underlying cognitive side-effects of antiepileptic drug (AED) treatment. METHODS: The relation between functional magnetic resonance-acquired brain network measures, AED use, and cognitive function was investigated. Three groups of patients with epilepsy with a different risk profile for developing cognitive side effects were included: A "low risk" category (lamotrigine or levetiracetam, n = 16), an "intermediate risk" category (carbamazepine, oxcarbazepine, phenytoin, or valproate, n = 34) and a "high risk" category (topiramate, n = 5)...
June 28, 2017: World Journal of Radiology
https://www.readbyqxmd.com/read/28715490/patterns-of-care-of-brain-tumor-related-epilepsy-a-cohort-study-done-in-italian-epilepsy-center
#19
Marta Maschio, Ettore Beghi, Marina M L Casazza, Gabriella Colicchio, Cinzia Costa, Paola Banfi, Stefano Quadri, Paolo Aloisi, Anna Teresa Giallonardo, Carla Buttinelli, Giada Pauletto, Salvatore Striano, Andrea Salmaggi, Riccardo Terenzi, Ornella Daniele, Giovanni Crichiutti, Francesco Paladin, Rosario Rossi, Giulia Prato, Federico Vigevano, Roberto De Simone, Federica Ricci, Marina Saladini, Fabrizio Monti, Susanna Casellato, Tiziano Zanoni, Diana Giannarelli, Giuliano Avanzini, Umberto Aguglia
Epilepsy is the most common comorbidity in patients with brain tumors. STUDY AIMS: To define characteristics of brain tumor-related epilepsy (BTRE) patients and identify patterns of care. Nationwide, multicenter retrospective cohort study. Medical records of BTRE patients seen from 1/1/2010 to 12/31/2011, followed for at least one month were examined. Information included age, sex, tumor type/treatments, epilepsy characteristics, antiepileptic drugs (AEDs). Time to modify first AED due to inefficacy and/or toxicity was assessed with the Kaplan-Meier method and Cox proportional hazard models were used to identify predictors of treatment outcome...
2017: PloS One
https://www.readbyqxmd.com/read/28715426/community-effectiveness-of-pyriproxyfen-as-a-dengue-vector-control-method-a-systematic-review
#20
Dorit Maoz, Tara Ward, Moody Samuel, Pie Müller, Silvia Runge-Ranzinger, Joao Toledo, Ross Boyce, Raman Velayudhan, Olaf Horstick
BACKGROUND: Vector control is the only widely utilised method for primary prevention and control of dengue. The use of pyriproxyfen may be promising, and autodissemination approach may reach hard to reach breeding places. It offers a unique mode of action (juvenile hormone mimic) and as an additional tool for the management of insecticide resistance among Aedes vectors. However, evidence of efficacy and community effectiveness (CE) remains limited. OBJECTIVE: The aim of this systematic review is to compile and analyse the existing literature for evidence on the CE of pyriproxyfen as a vector control method for reducing Ae...
July 17, 2017: PLoS Neglected Tropical Diseases
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