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https://www.readbyqxmd.com/read/28103255/mitigating-diseases-transmitted-by-aedes-mosquitoes-a-cluster-randomised-trial-of-permethrin-impregnated-school-uniforms
#1
Pattamaporn Kittayapong, Phanthip Olanratmanee, Pongsri Maskhao, Peter Byass, James Logan, Yesim Tozan, Valérie Louis, Duane J Gubler, Annelies Wilder-Smith
BACKGROUND: Viral diseases transmitted via Aedes mosquitoes are on the rise, such as Zika, dengue, and chikungunya. Novel tools to mitigate Aedes mosquitoes-transmitted diseases are urgently needed. We tested whether commercially insecticide-impregnated school uniforms can reduce dengue incidence in school children. METHODS: We designed a cluster-randomised controlled trial in Thailand. The primary endpoint was laboratory-confirmed dengue infections. Secondary endpoints were school absenteeism; and impregnated uniforms' 1-hour knock-down and 24 hour mosquito mortality as measured by standardised WHOPES bioassay cone tests at baseline and after repeated washing...
January 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28097419/modelling-wolbachia-infection-in-a-sex-structured-mosquito-population-carrying-west-nile-virus
#2
József Z Farkas, Stephen A Gourley, Rongsong Liu, Abdul-Aziz Yakubu
Wolbachia is possibly the most studied reproductive parasite of arthropod species. It appears to be a promising candidate for biocontrol of some mosquito borne diseases. We begin by developing a sex-structured model for a Wolbachia infected mosquito population. Our model incorporates the key effects of Wolbachia infection including cytoplasmic incompatibility and male killing. We also allow the possibility of reduced reproductive output, incomplete maternal transmission, and different mortality rates for uninfected/infected male/female individuals...
January 17, 2017: Journal of Mathematical Biology
https://www.readbyqxmd.com/read/28096902/functional-characterization-of-the-active-mutator-like-transposable-element-muta1-from-the-mosquito-aedes-aegypti
#3
Kun Liu, Susan R Wessler
BACKGROUND: Mutator-like transposable elements (MULEs) are widespread with members in fungi, plants, and animals. Most of the research on the MULE superfamily has focused on plant MULEs where they were discovered and where some are extremely active and have significant impact on genome structure. The maize MuDR element has been widely used as a tool for both forward and reverse genetic studies because of its high transposition rate and preference for targeting genic regions. However, despite being widespread, only a few active MULEs have been identified, and only one, the rice Os3378, has demonstrated activity in a non-host organism...
2017: Mobile DNA
https://www.readbyqxmd.com/read/28095875/assessment-of-synthetic-floral-based-attractants-and-sugar-baits-to-capture-male-and-female-aedes-aegypti-diptera-culicidae
#4
Kara Fikrig, Brian J Johnson, Durland Fish, Scott A Ritchie
BACKGROUND: The viruses transmitted by Aedes aegypti, including dengue and Zika viruses, are rapidly expanding in geographic range and as a threat to public health. In response, control programs are increasingly turning to the use of sterile insect techniques resulting in a need to trap male Ae. aegypti to monitor the efficacy of the intervention. However, there is a lack of effective and cheap methods for trapping males. Thus, we attempted to exploit the physiological need to obtain energy from sugar feeding in order to passively capture male and female Ae...
January 17, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28095414/mosquito-disseminated-insecticide-for-citywide-vector-control-and-its-potential-to-block-arbovirus-epidemics-entomological-observations-and-modeling-results-from-amazonian-brazil
#5
Fernando Abad-Franch, Elvira Zamora-Perea, Sérgio L B Luz
BACKGROUND: Mosquito-borne viruses threaten public health worldwide. When the ratio of competent vectors to susceptible humans is low enough, the virus's basic reproductive number (R0) falls below 1.0 (each case generating, on average, <1.0 additional case) and the infection fades out from the population. Conventional mosquito control tactics, however, seldom yield R0 < 1.0. A promising alternative uses mosquitoes to disseminate a potent growth-regulator larvicide, pyriproxyfen (PPF), to aquatic larval habitats; this kills most mosquito juveniles and substantially reduces adult mosquito emergence...
January 2017: PLoS Medicine
https://www.readbyqxmd.com/read/28095405/defining-the-risk-of-zika-and-chikungunya-virus-transmission-in-human-population-centers-of-the-eastern-united-states
#6
Carrie A Manore, Richard S Ostfeld, Folashade B Agusto, Holly Gaff, Shannon L LaDeau
The recent spread of mosquito-transmitted viruses and associated disease to the Americas motivates a new, data-driven evaluation of risk in temperate population centers. Temperate regions are generally expected to pose low risk for significant mosquito-borne disease; however, the spread of the Asian tiger mosquito (Aedes albopictus) across densely populated urban areas has established a new landscape of risk. We use a model informed by field data to assess the conditions likely to facilitate local transmission of chikungunya and Zika viruses from an infected traveler to Ae...
January 17, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28095184/ecotoxicological-effects-of-larvicide-used-in-the-control-of-aedes-aegypti-on-nontarget-organisms-redefining-the-use-of-pyriproxyfen
#7
Vanessa Santana Vieira Santos, Evelyn Siqueira Caixeta, Edimar Olegário de Campos Júnior, Boscolli Barbosa Pereira
The continued widespread use of larvicides in Aedes aegypti control programs is still a necessary strategy, since there are no apparent efficient vaccines against arboviruses. However, chemical approaches may affect nontarget organisms and produce detrimental effects to environmental health. Therefore, the aim of this study was to conduct toxicity testing for pyriproxyfen at different concentrations using Daphnia magna and Artemia salina as model organisms to evaluate the ecotoxicological parameters. This study describes the toxicological effects of pyriproxyfen on both microcrustaceans, which are widely used in bioassays because of their sensitivity to changes in hydrosphere...
January 17, 2017: Journal of Toxicology and Environmental Health. Part A
https://www.readbyqxmd.com/read/28092259/-first-case-of-chikungunya-fever-in-hermosillo-sonora-mexico
#8
Miguel Ángel Martínez-Medina, Ismael Antonio Cañedo-Dorame
The Chikungunya is an arbovirus first described during a 1952 outbreak of febrile exantematic disease in southern Tanganyika (now Tanzania). It is a virus within the alphavirus genus of the Togaviridae family, it is usually transmitted to humans by Aedes mosquitoes. Typically, the disease manifests as acute onset of fever and joint pains. This study describes the clinical characteristics the first imported case infected with chikungunya fever (CHIK) in Hermosillo, Sonora, Mexico. We report the case of a 30 years old man seen in our emergency department due to fever, polyarthralgia, rash and headache...
January 2017: Revista Médica del Instituto Mexicano del Seguro Social
https://www.readbyqxmd.com/read/28092249/-zika-virus-and-their-means-of-delivery-rather-than-aedes
#9
Luis Del Carpio-Orantes, María María Gonzáles-Clemente
In the present work an exposition of the most frequent vectors of the arboviruses is made highlighting the ones of the genus Aedes, of these in each geographic distribution there are specific subgeneros, in Africa emphasizes A. africanus, A. opok and A. vitatus like those in charge of The propagation of arboviruses. In Asia and Oceania, A. hensilii and A. polynesiensis stand out, and A. albopictus, in addition to A. koreicus and A. japonicus, the latter also responsible for dissemination in North America. It is mentioned in the wave that struck to South America the greater importance of other genera like Culex, emphasizing C...
January 2017: Revista Médica del Instituto Mexicano del Seguro Social
https://www.readbyqxmd.com/read/28090318/dengue-virus-antibodies-enhance-zika-virus-infection
#10
Lauren M Paul, Eric R Carlin, Meagan M Jenkins, Amanda L Tan, Carolyn M Barcellona, Cindo O Nicholson, Scott F Michael, Sharon Isern
For decades, human infections with Zika virus (ZIKV), a mosquito-transmitted flavivirus, were sporadic, associated with mild disease, and went underreported since symptoms were similar to other acute febrile diseases. Recent reports of severe disease associated with ZIKV have greatly heightened awareness. It is anticipated that ZIKV will continue to spread in the Americas and globally where competent Aedes mosquito vectors are found. Dengue virus (DENV), the most common mosquito-transmitted human flavivirus, is both well-established and the source of outbreaks in areas of recent ZIKV introduction...
December 2016: Clinical & Translational Immunology
https://www.readbyqxmd.com/read/28089368/the-transition-from-pediatric-to-adult-care-for-youth-with-epilepsy-basic-biological-sociological-and-psychological-issues
#11
REVIEW
Peter Camfield, Carol Camfield, Kanetee Busiah, David Cohen, Alison Pack, Rima Nabbout
Transition from pediatric to adult health care for adolescents with epilepsy is challenging for the patient, family, and health care workers. This paper is the first of three that summarize the main findings from the 2nd Symposium on Transition in Epilepsies, held in Paris from June 14-25, 2016. In this paper we describe five basic themes that have an important effect on transition. First, there are important brain changes in adolescence that leave an imbalance between risk taking and pleasure seeking behaviors and frontal executive function compared with adults...
January 12, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/28086897/application-of-the-analytic-hierarchy-approach-to-the-risk-assessment-of-zika-virus-disease-transmission-in-guangdong-province-china
#12
Xing Li, Tao Liu, Lifeng Lin, Tie Song, Xiaolong Du, Hualiang Lin, Jianpeng Xiao, Jianfeng He, Liping Liu, Guanghu Zhu, Weilin Zeng, Lingchuan Guo, Zheng Cao, Wenjun Ma, Yonghui Zhang
BACKGROUND: An international spread of Zika virus (ZIKV) infection has attracted global attention in 2015. The infection also affected Guangdong province, which is located in southern China. Multiple factors, including frequent communication with South America and Southeast Asia, suitable climate (sub-tropical) for the habitat of Aedes species, may increase the risk of ZIKV disease transmission in this region. METHODS: An analytic hierarchy process (AHP) method was used to develop a semi-quantitative ZIKV risk assessment model...
January 13, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28081143/engineered-aedes-aegypti-jak-stat-pathway-mediated-immunity-to-dengue-virus
#13
Natapong Jupatanakul, Shuzhen Sim, Yesseinia I Angleró-Rodríguez, Jayme Souza-Neto, Suchismita Das, Kristin E Poti, Shannan L Rossi, Nicholas Bergren, Nikos Vasilakis, George Dimopoulos
We have developed genetically modified Ae. aegypti mosquitoes that activate the conserved antiviral JAK/STAT pathway in the fat body tissue, by overexpressing either the receptor Dome or the Janus kinase Hop by the blood feeding-induced vitellogenin (Vg) promoter. Transgene expression inhibits infection with several dengue virus (DENV) serotypes in the midgut as well as systemically and in the salivary glands. The impact of the transgenes Dome and Hop on mosquito longevity was minimal, but it resulted in a compromised fecundity when compared to wild-type mosquitoes...
January 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28078104/discovery-of-flavivirus-derived-endogenous-viral-elements-in-anopheles-mosquito-genomes-supports-the-existence-of-anopheles-associated-insect-specific-flaviviruses
#14
Sebastian Lequime, Louis Lambrechts
The Flavivirus genus encompasses several arboviruses of public health significance such as dengue, yellow fever, and Zika viruses. It also includes insect-specific flaviviruses (ISFs) that are only capable of infecting insect hosts. The vast majority of mosquito-infecting flaviviruses have been associated with mosquito species of the Aedes and Culex genera in the Culicinae subfamily, which also includes most arbovirus vectors. Mosquitoes of the Anophelinae subfamily are not considered significant arbovirus vectors; however, flaviviruses have occasionally been detected in field-caught Anopheles specimens...
January 2017: Virus Evolution
https://www.readbyqxmd.com/read/28077263/learning-in-mosquito-larvae-aedes-aegypti-habituation-to-a-visual-danger-signal
#15
Hugo Baglan, Claudio Lazzari, Fernando Guerrieri
In spite of the mosquito Aedes aegypti being a vector of several infectious diseases, a limited number of studies has been undertaken on learning in this species. Moreover, larval stages have been neglected as model organisms, although they are active, aquatic and perform stereotyped behavioural responses, e.g. the escape response when disturbed. To study the learning abilities of mosquito larvae, we focused on habituation, a form of non-associative learning widely studied in vertebrates and invertebrates. Habituation was defined as the progressive and reversible decrease in response to a reiterative stimulus...
January 7, 2017: Journal of Insect Physiology
https://www.readbyqxmd.com/read/28075354/the-state-of-the-art-of-lethal-oviposition-trap-based-mass-interventions-for-arboviral-control
#16
Brian J Johnson, Scott A Ritchie, Dina M Fonseca
The intensifying expansion of arboviruses highlights the need for effective invasive Aedes control. While mass-trapping interventions have long been discredited as inefficient compared to insecticide applications, increasing levels of insecticide resistance, and the development of simple affordable traps that target and kill gravid female mosquitoes, show great promise. We summarize the methodologies and outcomes of recent lethal oviposition trap-based mass interventions for suppression of urban Aedes and their associated diseases...
January 8, 2017: Insects
https://www.readbyqxmd.com/read/28075232/records-of-aedes-albopictus-skuse-1894-diptera-culicidae-and-culex-tritaeniorhynchus-diptera-culicidae-expansion-in-areas-in-mainland-greece-and-islands
#17
Eleni Patsoula, Stavroula Beleri, Annita Vakali, Danai Pervanidou, Nikolaos Tegos, Andreas Nearchou, Demetrios Daskalakis, Spiros Mourelatos, Christos Hadjichristodoulou
Annual entomological surveillance programs aiming to monitor mosquito populations and record presence and absence of mosquito species have been performed in Greece. We report, in this study, new records and expansion of Aedes albopictus in the islands of Lesvos (region of North Aegean), Crete (region of Crete), and the regional units of Rodopi in East Macedonia-Thrace. Furthermore, Culex tritaeniorhynchus was recorded for the first time in Arta (region of Epirus) in northwestern Greece.
January 11, 2017: Vector Borne and Zoonotic Diseases
https://www.readbyqxmd.com/read/28074023/emergence-of-epidemic-zika-virus-transmission-and-congenital-zika-syndrome-are-recently-evolved-traits-to-blame
#18
Scott C Weaver
The mechanisms responsible for the dramatic emergence of Zika virus (ZIKV), accompanied by congenital Zika syndrome and Guillain-Barré syndrome (GBS), remain unclear. However, two hypotheses are prominent: (i) evolution for enhanced urban transmission via adaptation to mosquito vectors, or for enhanced human infection to increase amplification, or (ii) the stochastic introduction of ZIKV into large, naive human populations in regions with abundant Aedes aegypti populations, leading to enough rare, severe infection outcomes for their first recognition...
January 10, 2017: MBio
https://www.readbyqxmd.com/read/28073923/what-to-do-when-patients-with-epilepsy-cannot-take-their-usual-oral-medications
#19
Anna M Bank, Jong Woo Lee, Patricia Krause, Aaron L Berkowitz
When people with epilepsy are hospitalised for medical or surgical conditions, they may be unable to take their home antiepileptic drugs (AEDs). Such 'nil by mouth' people with epilepsy require alternative AED regimens to prevent breakthrough seizures. Here, we describe several strategies for maintaining seizure control in patients with epilepsy who have medical or surgical contraindications to their home oral regimens. These strategies include using non-pill oral formulations, using an intravenous formulation of the patient's home AED(s), using a benzodiazepine bridge and/or using alternative intravenous AED(s) when there are no intravenous formulations...
January 2017: Practical Neurology
https://www.readbyqxmd.com/read/28072887/dengue-fever-in-travellers-and-risk-of-local-spreading-case-reports-from-southern-italy-and-literature-update
#20
Claudia Fabrizio, Luciana Lepore, Maria Chironna, Gioacchino Angarano, Annalisa Saracino
Dengue fever (DF), an arbovirosis caused by Dengue viruses (DV, serotypes 1-4), is responsible for an increasing number of travel-related acute febrile illnesses due to population growth, climate changes, spreading by viremic travellers, and improved laboratory diagnosis. The presence of efficient vectors (mosquito Aedes albopictus) has also been described in temperate regions including Italy which is considered the most heavily infected European country. Normally characterized by non-specific signs and symptoms, DF incidence is probably underestimated, especially in non-endemic countries, but the risk of severe forms is substantial...
January 5, 2017: New Microbiologica
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