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https://www.readbyqxmd.com/read/29352633/current-concerns-and-perspectives-on-zika-virus-co-infection-with-arboviruses-and-hiv
#1
REVIEW
Hussin A Rothan, Mehdi R M Bidokhti, Siddappa N Byrareddy
Dissemination of vector-borne viruses, such as Zika virus (ZIKV), in tropical and sub-tropical regions has a complicated impact on the immunopathogenesis of other endemic viruses such as dengue virus (DENV), chikungunya virus (CHIKV) and human immunodeficiency virus (HIV). The consequences of the possible co-infections with these viruses have specifically shown significant impact on the treatment and vaccination strategies. ZIKV is a mosquito-borne flavivirus from African and Asian lineages that causes neurological complications in infected humans...
January 16, 2018: Journal of Autoimmunity
https://www.readbyqxmd.com/read/29350414/ross-river-virus-in-australian-blood-donors-possible-implications-for-blood-transfusion-safety
#2
Helen M Faddy, Thu V Tran, Veronica C Hoad, Clive R Seed, Elvina Viennet, Hiu-Tat Chan, Robert Harley, Elise Hewlett, Roy A Hall, Helle Bielefeldt-Ohmann, Robert L P Flower, Natalie A Prow
BACKGROUND: Emerging transfusion-transmissible pathogens, including arboviruses such as West Nile, Zika, dengue, and Ross River viruses, are potential threats to transfusion safety. The most prevalent arbovirus in humans in Australia is Ross River virus (RRV); however, prevalence varies substantially around the country. Modeling estimated a yearly risk of 8 to 11 potentially RRV-viremic fresh blood components nationwide. This study aimed to measure the occurrence of RRV viremia among donors who donated at Australian collection centers located in areas with significant RRV transmission during one peak season...
January 19, 2018: Transfusion
https://www.readbyqxmd.com/read/29346272/viral-and-antibody-kinetics-and-mosquito-infectivity-of-an-imported-case-of-zika-fever-due-to-asian-genotype-american-strain-in-singapore
#3
Cheong Huat Tan, Li Kiang Tan, Hapuarachchige Chanditha Hapuarachchi, Yee Ling Lai, Pei Sze Jeslyn Wong, Grace Yap, Keng Wai Mak, Wing Yan Wong, Yee Sin Leo, Mei Chun Wong, Lee Ching Ng
We report a case of a Singaporean who acquired Zika virus (ZIKV) during a visit to Cuba. The infection was confirmed using molecular and serological methods. This report highlights potential drawbacks of using IgG serology for diagnosis of flavivirus infections in endemic regions. The low viremia detected during the early phase of this case resulted in low mosquito infectivity rates, suggesting the possibility of ZIKV transmission prior to clinical onset. The report also emphasizes the challenges of public health interventions for Zika fever and the importance of sustaining a low vector population to reduce the risk of arbovirus transmission in vulnerable regions...
January 18, 2018: Viruses
https://www.readbyqxmd.com/read/29339224/emerging-souvenirs-clinical-presentation-of-the-returning-traveller-with-imported-arbovirus-infections-in-europe
#4
Isabella Eckerle, Violeta Briciu, Onder Ergonul, Mihaela Lupse, Anna Papa, Amanda Radulescu, Sotirios Tsiodras, Christine Tsitou, Christian Drosten, Véronique Nussenblatt, Chantal Reusken, Louise Sigfrid, Nick J Beeching
BACKGROUND: Arboviruses are an emerging group of viruses that are causing increasing health concerns globally, including in Europe. Clinical presentation usually consists of a non-specific febrile illness that may be accompanied by rash, arthralgia and arthritis and/or with neurological or haemorrhagic syndromes. The range of differential diagnoses of other infectious and non-infectious aetiologies is broad, presenting a challenge for physicians. While knowledge of the geographic distribution of pathogens and the current epidemiological situation, incubation periods, exposure risk factors and vaccination history can help guide the diagnostic approach, the non-specific and variable clinical presentation can delay final diagnosis...
January 12, 2018: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/29336951/design-synthesis-and-evaluation-against-chikungunya-virus-of-novel-small-molecule-antiviral-agents
#5
Roberta Tardugno, Gilda Giancotti, Tine De Burghgraeve, Leen Delang, Johan Neyts, Pieter Leyssen, Andrea Brancale, Marcella Bassetto
Chikungunya virus is a re-emerging arbovirus transmitted to humans by mosquitoes, responsible for an acute flu-like illness associated with debilitating arthralgia, which can persist for several months or become chronic. In recent years, this viral infection has spread worldwide with a previously unknown virulence. To date, no specific antivirals treatments nor vaccines are available against this important pathogen. Starting from the structures of two antiviral hits previously identified in our research group with in silico techniques, this work describes the design and preparation of 31 novel structural analogues, with which different pharmacophoric features of the two hits have been explored and correlated with the inhibition of Chikungunya virus replication in cells...
January 6, 2018: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/29329394/analysis-of-the%C3%A2-aedes-albopictus%C3%A2-c6-36-genome-provides-insight-into-cell-line-utility-for-viral-propagation
#6
Jason R Miller, Sergey Koren, Kari A Dilley, Vinita Puri, David M Brown, Derek M Harkins, Françoise Thibaud-Nissen, Benjamin Rosen, Xiao-Guang Chen, Zhijian Tu, Igor V Sharakhov, Maria V Sharakhova, Robert Sebra, Timothy B Stockwell, Nicholas H Bergman, Granger G Sutton, Adam M Phillippy, Peter M Piermarini, Reed S Shabman
Background: The 50-year old Aedes albopictus C6/36 cell line is a resource for the detection, amplification, and analysis of mosquito-borne viruses including Zika, dengue, and chikungunya. The cell line is derived from an unknown number of larvae from an unspecified strain of Aedes albopictus mosquitoes. Toward improved utility of the cell line for research in virus transmission, we present an annotated assembly of the C6/36 genome. Results: The C6/36 genome assembly has the largest contig N50 (3...
January 10, 2018: GigaScience
https://www.readbyqxmd.com/read/29329230/metagenomic-virome-analysis-of-culex-mosquitoes-from-kenya-and-china
#7
Evans Atoni, Yujuan Wang, Samuel Karungu, Cecilia Waruhiu, Ali Zohaib, Vincent Obanda, Bernard Agwanda, Morris Mutua, Han Xia, Zhiming Yuan
Many blood-feeding arthropods are known vectors of viruses that are a source of unprecedented global health concern. Mosquitoes are an integral part of these arthropod vectors. Advancements in next-generation sequencing and bioinformatics has expanded our knowledge on the richness of viruses harbored by arthropods. In the present study, we applied a metagenomic approach to determine the intercontinental virome diversity of Culex quinquefasciatus and Culex tritaeniorhynchus in Kwale, Kenya and provinces of Hubei and Yunnan in China...
January 12, 2018: Viruses
https://www.readbyqxmd.com/read/29324834/experimental-transmission-of-west-nile-virus-and-rift-valley-fever-virus-by-culex-pipiens-from-lebanon
#8
Renée Zakhia, Laurence Mousson, Marie Vazeille, Nabil Haddad, Anna-Bella Failloux
West Nile virus (WNV) and Rift Valley fever virus (RVFV) are two emerging arboviruses transmitted by Culex pipiens species that includes two biotypes: pipiens and molestus. In Lebanon, human cases caused by WNV and RVFV have never been reported. However, the introduction of these viruses in the country is likely to occur through the migratory birds and animal trades. In this study, we evaluated the ability of Cx. pipiens, a predominant mosquito species in urban and rural regions in Lebanon, to transmit WNV and RVFV...
January 11, 2018: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29324725/west-nile-virus-and-other-nationally-notifiable-arboviral-diseases-united-states-2016
#9
Alexis Burakoff, Jennifer Lehman, Marc Fischer, J Erin Staples, Nicole P Lindsey
Arthropod-borne viruses (arboviruses) are transmitted to humans primarily through the bites of infected mosquitoes and ticks. West Nile virus (WNV) is the leading cause of domestically acquired arboviral disease in the continental United States (1,2). Other arboviruses, including La Crosse, Powassan, Jamestown Canyon, St. Louis encephalitis, and eastern equine encephalitis viruses, cause sporadic cases of disease and occasional outbreaks. This report summarizes surveillance data reported to CDC for 2016 for nationally notifiable arboviruses...
January 12, 2018: MMWR. Morbidity and Mortality Weekly Report
https://www.readbyqxmd.com/read/29324047/the-discovery-of-arthropod-specific-viruses-in-hematophagous-arthropods-an-open-door-to-understanding-the-mechanisms-of-arbovirus-and-arthropod-evolution
#10
Charles H Calisher, Stephen Higgs
The discovery of an odd virus from hematophagous arthropods 40 years ago by Stollar and Thomas described cell fusing agent virus in cells derived from Aedes aegypti mosquitoes. Then came the report of Kamiti River virus from Ae. macintoshi in 1999, followed by worldwide reports of the discovery of other viruses of mosquitoes, ticks, and midges that replicate only in arthropods and not in vertebrates or in vertebrate cells. These viruses (now totaling at least 64 published) have genomes analogous to viruses in various families that include arboviruses and nonarboviruses...
January 7, 2018: Annual Review of Entomology
https://www.readbyqxmd.com/read/29322519/inactivation-of-chikungunya-virus-in-blood-components-treated-with-amotosalen-ultraviolet-a-light-or-amustaline-glutathione
#11
Andrew Laughhunn, Yan-Jang S Huang, Dana L Vanlandingham, Marion C Lanteri, Adonis Stassinopoulos
BACKGROUND: Chikungunya virus, a mosquito-borne arbovirus, often co-circulates with the Zika, dengue, and yellow fever viruses in Aedes mosquito-infested areas where cases of arbovirus transfusion-transmitted infections have been reported. Building on past experience to help maintain the availability of safe components during major outbreaks of chikungunya virus in La Reunion, Italy, and Thailand and of Zika virus in the Pacific, the Caribbean, and the Americas, pathogen inactivation is a mitigation strategy to reduce the risk of transfusion-transmitted infection...
January 10, 2018: Transfusion
https://www.readbyqxmd.com/read/29321321/functional-analysis-of-the-dengue-virus-genome-using-an-insertional-mutagenesis-screen
#12
Jeffrey W Perry, Yanhua Chen, Elizabeth Speliotes, Andrew W Tai
In the last few decades, dengue virus, an arbovirus, has spread to over 120 countries. Although a vaccine has been approved in some countries, limitations on its effectiveness, and a lack of effective antiviral treatments reinforce the need for additional research. The functions of several viral nonstructural proteins are essentially unknown. To better understand the functions of these proteins and thus dengue virus pathogenesis, we embarked on a genome wide transposon mutagenesis screen with Next Generation Sequencing to determine sites in the viral genome that tolerate 15 nucleotide insertions...
January 10, 2018: Journal of Virology
https://www.readbyqxmd.com/read/29318332/-zika-virus-infection-and-the-nervous-system
#13
REVIEW
I W Husstedt, M Maschke, C Eggers, E Neuen-Jacob, G Arendt
Zika virus is an arbovirus from the family of flaviviruses, which is transmitted by the mosquito Aedes aegyptii and also by the Asian mosquito Aedes albopticus. The largest observed Zika virus epidemic is currently taking place in North and South America, in the Caribbean, southern USA and Southeast Asia. In most cases the infection is an unspecific, acute, febrile disease. Neurological manifestations consist mainly of microcephaly in newborns and Guillain-Barré syndrome but other rare manifestations have also become known in the meantime, such as meningoencephalitis and myelitis...
January 9, 2018: Der Nervenarzt
https://www.readbyqxmd.com/read/29316963/mosquito-borne-arboviruses-of-african-origin-review-of-key-viruses-and-vectors
#14
REVIEW
Leo Braack, A Paulo Gouveia de Almeida, Anthony J Cornel, Robert Swanepoel, Christiaan de Jager
Key aspects of 36 mosquito-borne arboviruses indigenous to Africa are summarized, including lesser or poorly-known viruses which, like Zika, may have the potential to escape current sylvatic cycling to achieve greater geographical distribution and medical importance. Major vectors are indicated as well as reservoir hosts, where known. A series of current and future risk factors is addressed. It is apparent that Africa has been the source of most of the major mosquito-borne viruses of medical importance that currently constitute serious global public health threats, but that there are several other viruses with potential for international challenge...
January 9, 2018: Parasites & Vectors
https://www.readbyqxmd.com/read/29315224/the-zika-virus-epidemic-in-brazil-from-discovery-to-future-implications
#15
REVIEW
Rachel Lowe, Christovam Barcellos, Patrícia Brasil, Oswaldo G Cruz, Nildimar Alves Honório, Hannah Kuper, Marilia Sá Carvalho
The first confirmed case of Zika virus infection in the Americas was reported in Northeast Brazil in May 2015, although phylogenetic studies indicate virus introduction as early as 2013. Zika rapidly spread across Brazil and to more than 50 other countries and territories on the American continent. The Aedesaegypti mosquito is thought to be the principal vector responsible for the widespread transmission of the virus. However, sexual transmission has also been reported. The explosively emerging epidemic has had diverse impacts on population health, coinciding with cases of Guillain-Barré Syndrome and an unexpected epidemic of newborns with microcephaly and other neurological impairments...
January 9, 2018: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29313469/reptiles-and-amphibians-as-potential-reservoir-hosts-of-chikungunya-virus
#16
Angela M Bosco-Lauth, Airn E Hartwig, Richard A Bowen
Chikungunya virus is an emerging arbovirus of significant human-health concern. Little is known about its sylvatic cycle, including whether ectothermic vertebrates are permissive to infection. In this study, individuals from ten species of reptiles and amphibians were inoculated with chikungunya virus and samples of blood were tested to characterize viremia and seroconversion. Viremia was not detected in cane toads, house geckos, or American alligators, but most of the green iguanas, red-eared sliders, ball and Burmese pythons, leopard frogs, Texas toads, and garter snakes developed viremia...
January 8, 2018: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/29305089/how-do-virus-mosquito-interactions-lead-to-viral-emergence
#17
REVIEW
Claudia Rückert, Gregory D Ebel
Arboviruses such as West Nile, Zika, chikungunya, dengue, and yellow fever viruses have become highly significant global pathogens through unexpected, explosive outbreaks. While the rapid progression and frequency of recent arbovirus outbreaks is associated with long-term changes in human behavior (globalization, urbanization, climate change), there are direct mosquito-virus interactions which drive shifts in host range and alter virus transmission. This review summarizes how virus-mosquito interactions are critical for these viruses to become global pathogens at molecular, physiological, evolutionary, and epidemiological scales...
January 2, 2018: Trends in Parasitology
https://www.readbyqxmd.com/read/29301009/arbovirus-diagnostics-from-bad-to-worse-due-to-expanding-dengue-virus-vaccination-and-zika-virus-epidemics
#18
Graham Simmons, Mars Stone, Michael P Busch
No abstract text is available yet for this article.
December 30, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29298885/recombinant-chimpanzee-adenovirus-vaccine-adc7-m-e-protects-against-zika-virus-infection-and-testis-damage
#19
Kun Xu, Yufeng Song, Lianpan Dai, Yongli Zhang, Xuancheng Lu, Yijia Xie, Hangjie Zhang, Tao Cheng, Qihui Wang, Qingrui Huang, Yuhai Bi, William J Liu, Wenjun Liu, Xiangdong Li, Chuan Qin, Yi Shi, Jinghua Yan, Dongming Zhou, George F Gao
The recent outbreak of Zika virus (ZIKV) has emerged as a global health concern. ZIKV can persist in human semen and be transmitted by sexual contact, as well as by mosquitos as seen for classical arboviruses. We and others have previously demonstrated that ZIKV infection leads to testis damage and infertility in mouse models. So far, no prophylactics or therapeutics are available, therefore, vaccine development is urgently demanded. Recombinant chimpanzee adenovirus has been explored as the preferred vaccine vector for many pathogens due to the low pre-existing immunity against the vector among the human population...
January 3, 2018: Journal of Virology
https://www.readbyqxmd.com/read/29298302/characterization-of-a-candidate-tetravalent-vaccine-based-on-2-o-methyltransferase-mutants
#20
Roland Züst, Shi-Hua Li, Xuping Xie, Sumathy Velumani, Melissa Chng, Ying-Xiu Toh, Jing Zou, Hongping Dong, Chao Shan, Jassia Pang, Cheng-Feng Qin, Evan W Newell, Pei-Yong Shi, Katja Fink
Dengue virus (DENV) is one of the most widespread arboviruses. The four DENV serotypes infect about 400 million people every year, causing 96 million clinical dengue cases, of which approximately 500'000 are severe and potentially life-threatening. The only licensed vaccine has a limited efficacy and is only recommended in regions with high endemicity. We previously reported that 2'-O-methyltransferase mutations in DENV-1 and DENV-2 block their capacity to inhibit type I IFNs and render the viruses attenuated in vivo, making them amenable as vaccine strains; here we apply this strategy to all four DENV serotypes to generate a tetravalent, non-chimeric live-attenuated dengue vaccine...
2018: PloS One
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