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https://www.readbyqxmd.com/read/27920173/invasiveness-of-aedes-aegypti-and-aedes-albopictus-and-vectorial-capacity-for-chikungunya-virus
#1
Leon Philip Lounibos, Laura D Kramer
In this review, we highlight biological characteristics of Aedes aegypti and Aedes albopictus, 2 invasive mosquito species and primary vectors of chikungunya virus (CHIKV), that set the tone of these species' invasiveness, vector competence, and vectorial capacity (VC). The invasiveness of both species, as well as their public health threats as vectors, is enhanced by preference for human blood. Vector competence, characterized by the efficiency of an ingested arbovirus to replicate and become infectious in the mosquito, depends largely on vector and virus genetics, and most A...
December 15, 2016: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/27906961/tracking-insecticide-resistance-in-mosquito-vectors-of-arboviruses-the-worldwide-insecticide-resistance-network-win
#2
Vincent Corbel, Nicole L Achee, Fabrice Chandre, Mamadou B Coulibaly, Isabelle Dusfour, Dina M Fonseca, John Grieco, Waraporn Juntarajumnong, Audrey Lenhart, Ademir J Martins, Catherine Moyes, Lee Ching Ng, João Pinto, Kamaraju Raghavendra, Hassan Vatandoost, John Vontas, David Weetman, Florence Fouque, Raman Velayudhan, Jean-Philippe David
No abstract text is available yet for this article.
December 2016: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/27903317/laboratory-surveillance-of-arboviral-infections-in-a-southern-france-region-colonized-by-aedes-albopictus
#3
L Cadot, M Segondy, V Foulongne
The establishment of Aedes albopictus in southern France, a recognized competent vector for several arboviruses, represents a new threat for the local transmission and spread of what were until recently considered as tropical diseases. A preparedness and response plan, based on vigilance of both clinicians and laboratories, has introduced significant changes in guidelines and behaviour regarding patients' care specifically during the activity period of mosquitoes. In the present study, we report the results of a 1-year activity in arboviral infection diagnosis...
December 1, 2016: Epidemiology and Infection
https://www.readbyqxmd.com/read/27902331/the-plasma-virome-of-febrile-adult-kenyans-shows-frequent-parvovirus-b19-infections-and-a-novel-arbovirus-kadipiro-virus
#4
Carolyne Ngoi, Juliana Siqueira, Linlin Li, Xutao Deng, Peter Mugo, Susan Graham, Matt Price, Eduard Sanders, Eric Delwart
Viral nucleic acids present in the plasma of 498 Kenyan adults with unexplained fever were characterized by metagenomics analysis of 51 sample pools. The highest to lowest fraction of plasma pools was positive for parvovirus B19 (75%), pegivirus C (GBV-C) (67%), alpha anellovirus (59%), gamma anellovirus (55%), beta anellovirus (41%), Dengue virus genotype 2 (DENV-2) (16%), HIV-1 (6%), HHV-6 (6%), HBV (4%), rotavirus (4%), norovirus (4%), rhinovirus C (2%), Merkel cell polyomavirus (MCPyV)(2%) and Kadipiro virus (2%)...
October 24, 2016: Journal of General Virology
https://www.readbyqxmd.com/read/27901248/why-should-neurologists-start-to-be-interested-in-arboviruses
#5
EDITORIAL
Abelardo Q C Araújo
No abstract text is available yet for this article.
November 2016: Arquivos de Neuro-psiquiatria
https://www.readbyqxmd.com/read/27897196/product-release-is-rate-limiting-for-catalytic-processing-by-the-dengue-virus-protease
#6
A E Shannon, M M Pedroso, K J Chappell, D Watterson, S Liebscher, W M Kok, D P Fairlie, G Schenk, P R Young
Dengue Virus (DENV) is the most prevalent global arbovirus, yet despite an increasing burden to health care there are currently no therapeutics available to treat infection. A potential target for antiviral drugs is the two-component viral protease NS2B-NS3pro, which is essential for viral replication. Interactions between the two components have been investigated here by probing the effect on the rate of enzyme catalysis of key mutations in a mobile loop within NS2B that is located at the interface of the two components...
November 29, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27893824/analysis-of-synonymous-codon-usage-bias-of-zika-virus-and-its-adaption-to-the-hosts
#7
Hongju Wang, Siqing Liu, Bo Zhang, Wenqiang Wei
Zika virus (ZIKV) is a mosquito-borne virus (arbovirus) in the family Flaviviridae, and the symptoms caused by ZIKV infection in humans include rash, fever, arthralgia, myalgia, asthenia and conjunctivitis. Codon usage bias analysis can reveal much about the molecular evolution and host adaption of ZIKV. To gain insight into the evolutionary characteristics of ZIKV, we performed a comprehensive analysis on the codon usage pattern in 46 ZIKV strains by calculating the effective number of codons (ENc), codon adaptation index (CAI), relative synonymous codon usage (RSCU), and other indicators...
2016: PloS One
https://www.readbyqxmd.com/read/27892990/zika-virus-what-the-otolaryngologist-should-know-a-review
#8
Demetri Arnaoutakis, Tapan Padhya
Importance: Initially discovered in 1947, Zika virus infection received little notoriety as a tropical disease until 2015 when an outbreak of microcephaly cases was reported in Brazil. Zika is a single-stranded RNA arbovirus of the Flaviviridae family. The primary source of infection in humans stems from Aedes aegypti mosquito bites but can also occur through sexual, blood, and perinatal transmission. With expectations that 3 to 4 million people across the Americas will be infected over the next year, the World Health Organization has declared this event a Public Health Emergency of International Concern...
November 17, 2016: JAMA Otolaryngology—Head & Neck Surgery
https://www.readbyqxmd.com/read/27884174/comparative-morphological-and-molecular-analysis-confirms-the-presence-of-the-west-nile-virus-mosquito-vector-culex-univittatus-in-the-iberian-peninsula
#9
Verónica Mixão, Daniel Bravo Barriga, Ricardo Parreira, Maria Teresa Novo, Carla Alexandra Sousa, Eva Frontera, Marietjie Venter, Leo Braack, António Paulo Gouveia Almeida
BACKGROUND: Culex univittatus and Culex perexiguus mosquitoes (Diptera: Culicidae) are competent arbovirus vectors, but with unclear morphological differentiation. In Europe, and in the Iberian Peninsula in particular, the presence of either or both species is controversial. However, in order to conduct adequate surveillance for arboviruses in this region, it is crucial to clarify whether Cx. univittatus is present or not, as well as to critically assess existing differentiation tools...
November 25, 2016: Parasites & Vectors
https://www.readbyqxmd.com/read/27881148/susceptibility-profile-and-metabolic-mechanisms-involved-in-aedes-aegypti-and-aedes-albopictus-resistant-to-ddt-and-deltamethrin-in-the-central-african-republic
#10
Carine Ngoagouni, Basile Kamgang, Cécile Brengues, Gildas Yahouedo, Christophe Paupy, Emmanuel Nakouné, Mirdad Kazanji, Fabrice Chandre
BACKGROUND: Aedes aegypti and Ae. albopictus are the main epidemic vectors of dengue, chikungunya and Zika viruses worldwide. Their control during epidemics relies mainly on control of larvae and adults with insecticides. Unfortunately, loss of susceptibility of both species to several insecticide classes limits the efficacy of interventions. In Africa, where Aedes-borne viruses are of growing concern, few data are available on resistance to insecticides. To fill this gap, we assessed the susceptibility to insecticides of Ae...
November 24, 2016: Parasites & Vectors
https://www.readbyqxmd.com/read/27881079/detection-of-west-nile-virus-in-wild-birds-in-tana-river-and-garissa-counties-kenya
#11
Doris Nyamwaya, Virginia Wang'ondu, Joshua Amimo, George Michuki, Moses Ogugo, Enoch Ontiri, Rosemary Sang, Johanna Lindahl, Delia Grace, Bernard Bett
BACKGROUND: West Nile fever virus is a zoonotic arboviral infection maintained in a sylvatic cycle involving mosquito vectors and birds. It is one the arboviruses whose geographical range is expanding because of climate and land use changes that enhance the densities of mosquitoes and promote mosquito-bird-human interactions. We carried out a survey to determine the reservoirs of WNV among wild birds in Tana River and Garissa counties, Kenya. METHODS: Blood samples were obtained from 361 randomly trapped wild birds...
November 23, 2016: BMC Infectious Diseases
https://www.readbyqxmd.com/read/27879463/a-tale-of-two-flaviviruses-a-seroepidemiological-study-of-dengue-virus-and-west-nile-virus-transmission-in-the-ouest-and-sud-est-departments-of-haiti
#12
Thomas A Weppelmann, Alexandra Burne, Michael E von Fricken, Maha A Elbadry, Madsen Beau De Rochars, Jacques Boncy, Bernard A Okech
Though plans to eliminate malaria from the island of Hispaniola have recently received much attention, arbovirus surveillance continues to be largely neglected in Haiti. To support surveillance efforts and encourage vector-control strategies, a cross-sectional study of dengue virus (DENV) and West Nile virus (WNV) transmission was conducted using standard seroepidemiological methods. Blood samples (N = 673) were collected from 278 males and 395 females from three locations in the Ouest and Sud-Est Departments of Haiti...
November 22, 2016: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/27876643/the-emergence-of-arthropod-borne-viral-diseases-a-global-prospective-on-dengue-chikungunya-and-zika-fevers
#13
REVIEW
Sandra V Mayer, Robert B Tesh, Nikos Vasilakis
Arthropod-borne viruses (arboviruses) present a substantial threat to human and animal health worldwide. Arboviruses can cause a variety of clinical presentations that range from mild to life threatening symptoms. Many arboviruses are present in nature through two distinct cycles, the urban and sylvatic cycle that are maintained in complex biological cycles. In this review we briefly discuss the factors driving the emergence of arboviruses, such as the anthropogenic aspects of unrestrained human population growth, economic expansion and globalization...
November 19, 2016: Acta Tropica
https://www.readbyqxmd.com/read/27870689/zika-virus-and-diagnostics
#14
Claudia Raja Gabaglia
PURPOSE OF REVIEW: The purpose of this review is to present what is known about the Zika virus (ZIKV) at the time of writing this review. The viral structure and its phylogeny, as well as the limitations of current available techniques used for diagnosis, are discussed. RECENT FINDINGS: Crystallography and cryo-electron microscopy of the whole ZIKV, or a few of its proteins, are confirming its overall antigenic relatedness to other flaviviruses. Sequencing has revealed its dynamic genetic variation and has placed the Western cluster of Zika isolates within the Asian phylogenic tree...
November 18, 2016: Current Opinion in Pediatrics
https://www.readbyqxmd.com/read/27869956/-aedes-aegypti-control-strategies-a-review
#15
Ana Laura de Sene Amâncio Zara, Sandra Maria Dos Santos, Ellen Synthia Fernandes-Oliveira, Roberta Gomes Carvalho, Giovanini Evelim Coelho
OBJECTIVE: to describe the main strategies to control Aedes aegypti, with emphasis on promising technological innovations for use in Brazil. METHODS: this study is a non-systematic review of the literature. Results: several technologies have been developed as alternatives in the control of Ae. aegypti, using different mechanisms of action, such as selective monitoring of the infestation, social interventions, dispersing insecticides, new biological control agents and molecular techniques for population control of mosquitoes, also considering the combination between them...
April 2016: Epidemiologia e Servicos de Saude: Revista do Sistema Unico de Saude do Brasil
https://www.readbyqxmd.com/read/27869600/reemergence-of-st-louis-encephalitis-virus-california-2015
#16
Gregory S White, Kelly Symmes, Pu Sun, Ying Fang, Sandra Garcia, Cody Steiner, Kirk Smith, William K Reisen, Lark L Coffey
St. Louis encephalitis virus infection was detected in summer 2015 in southern California after an 11-year absence, concomitant with an Arizona outbreak. Sequence comparisons showed close identity of California and Arizona isolates with 2005 Argentine isolates, suggesting introduction from South America and underscoring the value of continued arbovirus surveillance.
December 2016: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/27869394/-recommendations-for-the-surveillance-of-aedes-aegypti
#17
Roberto Barrera
Diseases caused by arboviruses transmitted by Aedes aegypti, such as dengue, chikungunya and Zika, continue to rise in annual incidence and geographic expansion. A key limitation for achieving control of A. aegypti has been the lack of effective tools for monitoring its population, and thus determine what control measures actually work. Surveillance of A. aegypti has been based mainly on immature indexes, but they bear little relation to the number of mosquito females, which are the ones capable of transmitting the viruses...
September 1, 2016: Biomédica: Revista del Instituto Nacional de Salud
https://www.readbyqxmd.com/read/27861219/rapidly-resolving-weakness-related-to-hypokalemia-in-patients-infected-with-dengue-virus
#18
Pradeep K Maurya, Dinkar Kulshreshtha, Ajai K Singh, Anup K Thacker
OBJECTIVES: Dengue is a mosquito-borne disease caused by arbovirus and well known for its typical fever with thrombocytopenia syndrome. Acute hypokalemic quadriparesis is a rare presentation of dengue with uncertain pathogenesis. We aim to describe the clinical and biochemical characteristics of rapidly resolving weakness related to hypokalemia in patients infected with dengue virus. METHODS: A retrospective review of the records of patients with diagnosis of dengue-associated hypokalemic weakness was performed...
December 2016: Journal of Clinical Neuromuscular Disease
https://www.readbyqxmd.com/read/27860021/detection-of-leishmania-amazonensis-and-leishmania-braziliensis-in-culicoides-diptera-ceratopogonidae-in-an-endemic-area-of-cutaneous-leishmaniasis-in-the-brazilian-amazonia
#19
José Manuel Macário Rebêlo, Bruno Leite Rodrigues, Maria da Conceição Abreu Bandeira, Jorge Luiz Pinto Moraes, Raquel Silva Fonteles, Silma Regina Ferreira Pereira
Biting midges in the genus Culicoides act as vectors of arboviruses throughout the world and as vectors of filariasis in Latin America, the Caribbean, and parts of Africa. Although Culicoides spp. are currently not considered to be vectors of Leishmania protozoa, the high abundance of biting midges in areas with active cutaneous leishmaniasis transmission points to the possibility of Culicoides infection by these pathogens. We used PCR to test captured Culicoides species for natural infection with Leishmania spp...
December 2016: Journal of Vector Ecology: Journal of the Society for Vector Ecology
https://www.readbyqxmd.com/read/27860005/determining-culex-annulirostris-larval-densities-and-control-efforts-across-a-coastal-wetland-northern-territory-australia
#20
N Kurucz, S Jacups, J M Carter
The Darwin coastal wetlands provide suitable breeding conditions for Culex annulirostris, which is abundant between December and August each year. This species is the principal vector for arboviruses, including Ross River virus and Murray Valley encephalitis, and is an appreciable pest species. Aerial control is conducted when routine larval surveys for this species predict high numbers of emergent adults. We sought to determine the most productive vegetation categories and seasonal aspects associated with Cx...
December 2016: Journal of Vector Ecology: Journal of the Society for Vector Ecology
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