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Guilherme Amaral Calvet, Patricia Brasil, Andre Machado Siqueira, Heruza Einsfeld Zogbi, Bianca de Santis Gonçalves, Aline da Silva Santos, Otilia Lupi, Rogerio Valls de Souza, Cintia Damasceno Dos Santos Rodrigues, Clarisse da Silveira Bressan, Mauymi Duarte Wakimoto, Eliane Saraiva de Araújo, Ingrid Cardoso Dos Santos, Ingebourg Georg, Rita Maria Ribeiro Nogueira, Valdilea Gonçalves Veloso, Ana Maria Bispo de Filippis
BackgroundZika virus (ZIKV) emergence in South America revealed the lack of knowledge regarding clinical manifestations in HIV-infected individuals. OBJECTIVES: We described the clinical characteristics, laboratory manifestations, differential diagnosis, and outcome of ZIKV infection in a large, single-center cohort of HIV-infected patients.MethodsHIV-infected patients aged ≥ 18 years with clinical suspected arboviral disease from an ongoing cohort were followed from February through December 2015...
June 14, 2018: Journal of Acquired Immune Deficiency Syndromes: JAIDS
Rodrigo Gopar-Nieto, Nancy Libertad Chávez-Gómez, María Elisa González-Rentería, Luis Adrián Estrada-Loyo, Roberto de Jesús García-Avilés, Carlos Lenin Pliego-Reyes
The first report of chikungunya virus (CHIKV) in Mexico was in may 2014, in Jalisco, and has disseminated along the country in such a way that now is considered a relevant emergent vector-transmitted infection. It is clinically diagnosed by abrupt onset fever, asthenia, arthralgias, myalgias, headache and rash. In the clinical case, we described a women from Guerrero that had pulmonary symptomatology associated to CHIKV, which is an atypical clinical presentation that has been reported only in a hundred cases worldwide...
March 2018: Revista Médica del Instituto Mexicano del Seguro Social
Shannan L Rossi, Gregory D Ebel, Chao Shan, Pei-Yong Shi, Nikos Vasilakis
Zika virus (ZIKV) has challenged the assumed knowledge regarding the pathobiology of flaviviruses. Despite causing sporadic and mild disease in the 50 years since its discovery, Zika virus has now caused multiple outbreaks in dozens of countries worldwide. Moreover, the disease severity in recent outbreaks, with neurological disease in adult and devastating congenital malformations in fetuses, was not previously seen. One hypothesis is that the virus has acquired mutations that have increased its virulence...
June 11, 2018: Trends in Microbiology
Chetan D Meshram, Peter Agback, Nikita Shiliaev, Nadya Urakova, James A Mobley, Tatiana Agback, Elena I Frolova, Ilya Frolov
Alphaviruses are widely distributed in both hemispheres and circulate between mosquitoes and amplifying vertebrate hosts. Geographically separated alphaviruses have adapted to replication in particular organisms. The accumulating data suggest that this adaptation is determined not only by changes in their glycoproteins, but also by the amino acid sequence of the hypervariable domain (HVD) of the alphavirus nsP3 protein. We performed a detailed investigation of chikungunya virus (CHIKV) nsP3 HVD interactions with host factors and their roles in viral replication in vertebrate and mosquito cells...
June 13, 2018: Journal of Virology
Despina Contopoulos-Ioannidis, Shoshana Newman-Lindsay, Camille Chow, A Desiree LaBeaud
BACKGROUND: Chikungunya virus (CHIKV) is an emerging arboviral infection with a global distribution and may cause fetal and neonatal infections after maternal CHIKV-infections during gestation. METHODOLOGY: We performed a systematic review to evaluate the risk for: a) mother-to-child transmission (MTCT), b) antepartum fetal deaths (APFD), c) symptomatic neonatal disease, and d) neonatal deaths from maternal CHIKV-infections during gestation. We also recorded the neonatal clinical manifestations after such maternal infections (qualitative data synthesis)...
June 13, 2018: PLoS Neglected Tropical Diseases
Surender Kumar, Gopal Agrawal, Sanjay Wazir, Anil Kumar, Sandeep Dubey, Manish Balde, Bir Singh Yadav
Background: In 2016, there was a massive outbreak of chikungunya in North India. During the epidemic, we observed many neonatal and early infantile cases of chikungunya, with a probable perinatal transmission. Methods: This retrospective study was carried out in a tertiary care neonatal centre between August 2016 and November 2016. Chikungunya virus (CHIKV) infection was detected and confirmed by reverse transcription-polymerase chain reaction (RT-PCR) and/or serology (anti-CHIKV IgM) in mothers and infants...
June 9, 2018: Journal of Tropical Pediatrics
Nildimar Alves Honório, Keenan Wiggins, Daniel Cardoso Portela Câmara, Bradley Eastmond, Barry W Alto
Chikungunya virus is a vector-borne alphavirus transmitted by the bites of infected female Ae. aegypti and Ae. albopictus. In Brazil between 2014 and 2016 almost 320 thousand autochthonous human cases were reported and in Florida numerous imported CHIKV viremic cases (> 3,800) demonstrate the potential high risk to establishment of local transmission. In the present study, we carried out a series of experiments to determine the viral dissemination and transmission rates of different Brazilian and Florida populations of Ae...
June 7, 2018: PLoS Neglected Tropical Diseases
Roland Remenyi, Yanni Gao, Ruth E Hughes, Alistair Curd, Carsten Zothner, Michelle Peckham, Andres Merits, Mark Harris
Chikungunya virus (CHIKV), a mosquito-borne human pathogen, causes a disabling disease characterized by severe joint pain that can persist for weeks, months or even years in patients. The non-structural protein 3 (nsP3) plays essential roles during acute infection, but little is known about the function of nsP3 during chronic disease. Here, we used sub-diffraction multi-color microscopy for spatial and temporal analysis of CHIKV nsP3 within human cells that persistently replicate replicon RNA. Round cytoplasmic granules of various sizes (i) contained nsP3 and stress granule assembly factors 1 and 2 (G3BP1/2); (ii) were next to double-stranded RNA foci and nsP1-positive structures; and (iii) were close to the nuclear membrane and the nuclear pore complex protein Nup98...
June 6, 2018: Journal of Virology
Deepti Parashar, Mandar S Paingankar, Ashwini More, Poonam Patil, Sarika Amdekar
Chikungunya virus (CHIKV) infection can cause severe arthralgia and chronic arthritis in humans. MicroRNAs (miRNA) have demonstrated their potential use as biomarker in variety of human pathologies and infections. This study was conducted to understand the miRNA signature in early CHIKV infection stages. In the current study, we used TaqMan-based quantitative PCR method to identify the miRNA signature of host response upon CHIKV infection in human and mouse fibroblast cells. The GO enrichment analysis suggests that the putative target genes of these differentially expressed miRNAs are to be involved in RIG-I pathway, TGF-beta-signaling pathway, JAK-STAT-signaling pathway, MAPK-signaling pathway, cytokine-cytokine receptor interactions, and Fc gamma R-mediated phagocytosis...
June 5, 2018: Virus Genes
Claudia Fortuna, Luciano Toma, Maria Elena Remoli, Antonello Amendola, Francesco Severini, Daniela Boccolini, Roberto Romi, Giulietta Venturi, Giovanni Rezza, Marco Di Luca
We compared the vector competence of an Italian population of Aedes albopictus for two strains of chikungunya virus (CHIKV), with and without E1:A226V mutation, responsible for outbreaks in 2007 in the Emilia Romagna region and 2017 in the Lazio and Calabria regions, respectively. Ae. albopictus showed similar vector competence for both viral strains indicating that E1:A226V mutation is not exclusively responsible for ability of CHIKV to replicate well in this mosquito species.
May 2018: Euro Surveillance: Bulletin Européen sur les Maladies Transmissibles, European Communicable Disease Bulletin
Alexander T Ciota, Pamela A Chin, Dylan J Ehrbar, Maria Victoria Micieli, Dina M Fonseca, Laura D Kramer
Aedes aegypti (L.) (Diptera: Culicidae) have a global distribution and are the primary vector of a number of mosquito-borne viruses responsible for epidemics throughout the Americas. As in much of South America, the threat from pathogens including dengue virus (DENV; Flaviviridae, Flavivirus ) and chikungunya virus (CHIKV; Togaviridae, Alphavirus ) has increased in Argentina in recent years. The complexity of transmission cycles makes predicting the occurrence and intensity of arbovirus outbreaks difficult...
June 4, 2018: American Journal of Tropical Medicine and Hygiene
Leila C Sahni, Rebecca S B Fischer, Rodion Gorchakov, Rebecca M Berry, Daniel C Payne, Kristy O Murray, Julie A Boom
We instituted active surveillance among febrile patients presenting to the largest Houston-area pediatric emergency department to identify acute infections of dengue virus (DENV), West Nile virus (WNV), and chikungunya virus (CHIKV). In 2014, 1,063 children were enrolled, and 1,015 (95%) had blood and/or cerebrospinal fluid specimens available for DENV, WNV, and CHIKV testing. Almost half (49%) reported recent mosquito bites, and 6% ( N = 60) reported either recent international travel or contact with an international traveler...
June 4, 2018: American Journal of Tropical Medicine and Hygiene
Ambika R Keramagi, Sinosh Skariyachan
The current study aimed to assess the binding potential of herbal lead molecules against the prioritized molecular targets of chikungunya virus (CHIKV) and dengue virus (DENV) by computational virtual screening and suggests a novel therapeutic intervention. Based on the metabolic pathway analysis and virulent functions, the non-structural and envelop proteins present in CHIKV and DENV were identified as putative drug targets. The structures of the protein not available in their native forms were computationally predicted by homology modeling...
June 2018: 3 Biotech
Julien Riou, Chiara Poletto, Pierre-Yves Boëlle
Model-based epidemiological assessment is useful to support decision-making at the beginning of an emerging Aedes-transmitted outbreak. However, early forecasts are generally unreliable as little information is available in the first few incidence data points. Here, we show how past Aedes-transmitted epidemics help improve these predictions. The approach was applied to the 2015-2017 Zika virus epidemics in three islands of the French West Indies, with historical data including other Aedes-transmitted diseases (Chikungunya and Zika) in the same and other locations...
June 4, 2018: PLoS Neglected Tropical Diseases
Sarah K White, Carla Mavian, Maha A Elbadry, Valery Madsen Beau De Rochars, Taylor Paisie, Taina Telisma, Marco Salemi, John A Lednicky, J Glenn Morris
In the context of recent arbovirus epidemics, questions about the frequency of simultaneous infection of patients with different arbovirus species have been raised. In 2014, a major Chikungunya virus (CHIKV) epidemic impacted the Caribbean and South America. As part of ongoing screening of schoolchildren presenting with acute undifferentiated febrile illness in rural Haiti, we used RT-PCR to identify CHIKV infections in 82 of 100 children with this diagnosis during May-August 2014. Among these, eight were infected with a second arbovirus: six with Zika virus (ZIKV), one with Dengue virus serotype 2, and one with Mayaro virus (MAYV)...
May 31, 2018: PLoS Neglected Tropical Diseases
Kai Zhi Wong, Justin Jang Hann Chu
Chikungunya virus (CHIKV) has re-emerged as one of the many medically important arboviruses that have spread rampantly across the world in the past decade. Infected patients come down with acute fever and rashes, and a portion of them suffer from both acute and chronic arthralgia. Currently, there are no targeted therapeutics against this debilitating virus. One approach to develop potential therapeutics is by understanding the viral-host interactions. However, to date, there has been limited research undertaken in this area...
May 30, 2018: Viruses
Claudia Ohst, Sandra Saschenbrecker, Konstanze Stiba, Katja Steinhagen, Christian Probst, Christiane Radzimski, Erik Lattwein, Lars Komorowski, Winfried Stöcker, Wolfgang Schlumberger
Climate change, increased urbanization and international travel have facilitated the spread of mosquito vectors and the viral species they carry. Zika virus (ZIKV) is currently spreading in the Americas, while dengue virus (DENV) and chikungunya virus (CHIKV) have already become firmly established in most tropical and also many non-tropical regions. ZIKV, DENV and CHIKV overlap in their endemic areas and cause similar clinical symptoms, especially in the initial stages of infection. Infections with each of these viruses can lead to severe complications, and co-infections have been reported...
2018: Advances in Experimental Medicine and Biology
Paul R Young
Arboviruses are a diverse group of vector-borne viruses, many of whose members are the cause of significant human morbidity and mortality. Over the last 30 years, the emergence and/or resurgence of arboviruses have posed a considerable global health threat. The ongoing geographical expansion of the dengue viruses (DENV), along with the explosive outbreaks of West Nile virus (WNV), Chikungunya virus (CHIKV) and more recently, Zika virus (ZIKV) have all served as reminders that new epidemics may emerge at any time from this diversity...
2018: Advances in Experimental Medicine and Biology
Benjamin Lopez-Jimena, Stefanie Wehner, Graham Harold, Mohammed Bakheit, Sieghard Frischmann, Michaël Bekaert, Oumar Faye, Amadou Alpha Sall, Manfred Weidmann
BACKGROUND: A single-tube one-step real-time reverse transcription loop-mediated isothermal amplification (RT-LAMP) assay for rapid detection of chikungunya virus (CHIKV) targeting the conserved 6K-E1 target region was developed. The assay was validated with sera collected from a CHIKV outbreak in Senegal in 2015. METHODOLOGY/PRINCIPAL FINDINGS: A novel design approach by combining Principal Component Analysis and phylogenetic analysis of 110 available CHIKV sequences and the LAMP oligonucleotide design software LAVA was used...
May 2018: PLoS Neglected Tropical Diseases
Anasuya Chattopadhyay, Patricia V Aguilar, Nathen E Bopp, Timur O Yarovinsky, Scott C Weaver, John K Rose
Chikungunya virus (CHIKV) and Zika virus (ZIKV) have recently expanded their range in the world and caused serious and widespread outbreaks of near pandemic proportions. There are no licensed vaccines that protect against these co-circulating viruses that are transmitted by invasive mosquito vectors. We report here on the development of a single-dose, bivalent experimental vaccine for CHIKV and ZIKV. This vaccine is based on a chimeric vesicular stomatitis virus (VSV) that expresses the CHIKV envelope polyprotein (E3-E2-6K-E1) in place of the VSV glycoprotein (G) and also expresses the membrane-envelope (ME) glycoproteins of ZIKV...
May 25, 2018: Vaccine
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