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Chikungunya CHIKV

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https://www.readbyqxmd.com/read/28777313/co-infection-of-mosquitoes-with-chikungunya-and-dengue-viruses-reveals-modulation-of-the-replication-of-both-viruses-in-midguts-and-salivary-glands-of-aedes-aegypti-mosquitoes
#1
Alain Le Coupanec, Stéphane Tchankouo-Nguetcheu, Pascal Roux, Huot Khun, Michel Huerre, Ronald Morales-Vargas, Margot Enguehard, Dimitri Lavillette, Dorothée Missé, Valérie Choumet
Arthropod-borne virus (arbovirus) infections cause several emerging and resurgent infectious diseases in humans and animals. Chikungunya-affected areas often overlap with dengue-endemic areas. Concurrent dengue virus (DENV) and chikungunya virus (CHIKV) infections have been detected in travelers returning from regions of endemicity. CHIKV and DENV co-infected Aedes albopictus have also been collected in the vicinity of co-infected human cases, emphasizing the need to study co-infections in mosquitoes. We thus aimed to study the pathogen-pathogen interaction involved in these co-infections in DENV/CHIKV co-infected Aedes aegypti mosquitoes...
August 4, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28760614/regulatory-considerations-in-development-of-vaccines-to-prevent-disease-caused-by-chikungunya-virus
#2
REVIEW
Sixun Yang, Doran Fink, Andrea Hulse, R Douglas Pratt
Chikungunya virus (CHIKV) is a mosquito-transmitted alphavirus. Chikungunya disease (CHIK) in humans is characterized by sudden onset of high fever, cutaneous rash, myalgia and debilitating polyarthralgia. Until recently the virus was considered endemic to only Africa and Asia, but since 2004 CHIK has spread to previously non-endemic regions, including Europe and the Americas, thereby emerging as a global health threat. Although a variety of CHIKV vaccine candidates have been tested in animals, and a few have advanced to human clinical trials, no licensed vaccine is currently available for prevention of disease...
July 28, 2017: Vaccine
https://www.readbyqxmd.com/read/28760340/synergistic-effects-of-combination-treatment-using-egcg-and-suramin-against-the-chikungunya-virus
#3
Jeng-Wei Lu, Po-Shiuan Hsieh, Chang-Chi Lin, Ming-Kuan Hu, Shih-Ming Huang, Yu-Ming Wang, Chun-Yu Liang, Zhiyuan Gong, Yi-Jung Ho
Chikungunya is a severe disease that results from infection with the chikungunya virus (CHIKV), an arbovirus. Thus, we (1) explored a new approach to combining previously researched drugs that have shown the potential to inhibit CHIKV infection; and (2) demonstrated the antiviral effects of (-)-Epigallocatechin-3-gallate (EGCG) and the underlying mechanisms. Specifically, we used U2OS cells infected with CHIVK to assess the synergistic antiviral activities of EGCG and suramin. EGCG presented the ability to inhibit the viral RNA, progeny yield, and cytopathic effect (CPE) of CHIKV and also demonstrated the ability to protect against virus entry, replication, and release...
July 28, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28756561/evidence-of-dengue-and-chikungunya-virus-co-infection-and-circulation-of-multiple-dengue-serotypes-in-a-recent-indian-outbreak
#4
S Mukherjee, S K Dutta, S Sengupta, A Tripathi
In India, dengue endemic areas overlap with chikungunya-affected areas and both the viruses are transmitted by same vector, Aedes aegypti - thereby increasing opportunity of co-infection by both viruses. Present study was carried out to understand the DENV-CHIKV infection dynamics during recent outbreaks in eastern India (West Bengal state) and its implication on disease manifestations. Blood was collected from 326 symptomatic febrile patients. Patients' serum was subjected to serological diagnosis for presence of anti-dengue-IgM, anti-chikungunya-IgM antibodies and dengue-NS1 antigen by ELISA...
July 29, 2017: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/28749964/transmission-risk-of-two-chikungunya-lineages-by-invasive-mosquito-vectors-from-florida-and-the-dominican-republic
#5
Barry W Alto, Keenan Wiggins, Bradley Eastmond, Daniel Velez, L Philip Lounibos, Cynthia C Lord
Between 2014 and 2016 more than 3,800 imported human cases of chikungunya fever in Florida highlight the high risk for local transmission. To examine the potential for sustained local transmission of chikungunya virus (CHIKV) in Florida we tested whether local populations of Aedes aegypti and Aedes albopictus show differences in susceptibility to infection and transmission to two emergent lineages of CHIKV, Indian Ocean (IOC) and Asian genotypes (AC) in laboratory experiments. All examined populations of Ae...
July 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28747508/mutations-in-the-e2-glycoprotein-and-the-3-untranslated-region-enhance-chikungunya-virus-virulence-in-mice
#6
David W Hawman, Kathryn S Carpentier, Julie M Fox, Nicholas A May, Wes Sanders, Stephanie A Montgomery, Nathaniel J Moorman, Michael S Diamond, Thomas E Morrison
Chikungunya virus (CHIKV) is a mosquito-transmitted alphavirus that causes debilitating musculoskeletal pain and inflammation and can persist for months to years after acute infection. Although studies in humans and experimentally-infected animals suggest that CHIKV infection persists in musculoskeletal tissues, the mechanisms for this remain poorly understood. To evaluate this further, we isolated CHIKV from the serum of persistently infected Rag1(-/-) mice at day 28. When inoculated into naïve WT mice, this persistently circulating CHIKV strain displayed a capacity for earlier dissemination and greater pathogenicity compared with the parental virus...
July 26, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28743449/dengue-serotype-circulation-in-natural-populations-of-aedes-aegypti
#7
Taissa Pereira Dos Santos, Oswaldo Gonsalvez Cruz, Keli Antunes Barbosa da Silva, Márcia Gonçalves de Castro, Anielly Ferreira de Brito, Renato Cesar Maspero, Rosilene de Alcântra, Flávia Barreto Dos Santos, Nildimar A Honorio, Ricardo Lourenço-de-Oliveira
Ae. aegypti is the main vector of dengue (DENV), Zika (ZIKV), and chikungunya (CHIKV) viruses. The transmission dynamics of these arboviruses, especially the arboviral circulation in the mosquito population during low and high transmission seasons in endemic areas are still poorly understood. We conducted an entomological survey to determine dengue infection rates in Ae. aegypti and Aedes albopictus. These collections were performed in 2012-2013 during a Rio de Janeiro epidemic, just before the introduction and spread of ZIKV and CHIKV in the city...
July 23, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28742401/chikungunya-virus-seroprevalence-and-associated-factors-among-hospital-attendees-in-two-states-of-southwest-nigeria-a-preliminary-assessment
#8
Olayinka M Olajiga, Olajumoke E Adesoye, Adewale P Emilolorun, Abiodun J Adeyemi, Emmanuel O Adeyefa, Ismail A Aderibigbe, Salmot A Adejumo, Wasiu O Adebimpe, Oluyinka O Opaleye, Waidi F Sule, Daniel O Oluwayelu
Chikungunya virus (CHIKV) is a re-emerging pathogen causing long-term polyarthritis and encephalitis. In conducting a preliminary investigation, we hypothesized that there is no serologic evidence of CHIKV infection among attendees of selected hospitals in Lagos and Osun States, Nigeria. Sera from 304 consecutively selected participants were screened for CHIKV IgG and IgM using ELISA. Findings were analyzed vis-à-vis participants' demographic and clinical data. Over 90.0% of the participants had never heard of CHIKV despite the fact that a large proportion of them (88...
August 2017: Immunological Investigations
https://www.readbyqxmd.com/read/28739354/recommendations-of-the-brazilian-society-of-rheumatology-for-the-diagnosis-and-treatment-of-chikungunya-fever-part-2-treatment
#9
Claudia Diniz Lopes Marques, Angela Luzia Branco Pinto Duarte, Aline Ranzolin, Andrea Tavares Dantas, Nara Gualberto Cavalcanti, Rafaela Silva Guimarães Gonçalves, Laurindo Ferreira da Rocha Junior, Lilian David de Azevedo Valadares, Ana Karla Guedes de Melo, Eutilia Andrade Medeiros Freire, Roberto Teixeira, Francisco Alves Bezerra Neto, Marta Maria das Chagas Medeiros, Jozélio Freire de Carvalho, Mario Sergio F Santos, Regina Adalva de L Couto Océa, Roger A Levy, Carlos Augusto Ferreira de Andrade, Geraldo da Rocha Castelar Pinheiro, Mirhelen Mendes Abreu, José Fernando Verztman, Selma Merenlender, Sandra Lucia Euzebio Ribeiro, Izaias Pereira da Costa, Gecilmara Pileggi, Virginia Fernandes Moça Trevisani, Max Igor Banks Lopes, Carlos Brito, Eduardo Figueiredo, Fabio Queiroga, Tiago Feitosa, Angélica da Silva Tenório, Gisela Rocha de Siqueira, Renata Paiva, José Tupinambá Sousa Vasconcelos, Georges Christopoulos
Chikungunya fever has become an important public health problem in countries where epidemics occur because half of the cases progress to chronic, persistent and debilitating arthritis. Literature data on specific therapies at the various phases of arthropathy caused by chikungunya virus (CHIKV) infection are limited, lacking quality randomized trials assessing the efficacies of different therapies. There are a few studies on the treatment of musculoskeletal manifestations of chikungunya fever, but these studies have important methodological limitations...
July 21, 2017: Revista Brasileira de Reumatologia
https://www.readbyqxmd.com/read/28731409/assessment-of-the-probability-of-autochthonous-transmission-of-chikungunya-virus-in-canada-under-recent-and-projected-climate-change
#10
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/28728590/chikungunya-virus-infection-in-cynomolgus-macaques-following-intradermal-and-aerosol-exposure
#11
Chris M Cirimotich, Eric M Vela, Jennifer Garver, Roy E Barnewall, Brian D Miller, Gabriel T Meister, James V Rogers
BACKGROUND: Chikungunya virus (CHIKV) is transmitted via mosquito bite and potentially by aerosol, causing chikungunya fever and arthritic disease in humans. There are currently no licensed vaccines or antiviral therapeutics to protect against CHIKV infection in humans. Animal models recapitulating human disease, especially for transmission by aerosol, are needed for licensure of such medical countermeasures. METHODS: Cynomolgus macaques (CMs) were challenged by intradermal (ID) inoculation or exposure to an aerosol containing CHIKV Ross strain at different target infectious doses (10(3)-10(7) plaque forming units (PFU))...
July 20, 2017: Virology Journal
https://www.readbyqxmd.com/read/28720784/snap-tagged-chikungunya-virus-replicons-improve-visualisation-of-non-structural-protein-3-by-fluorescence-microscopy
#12
Roland Remenyi, Grace C Roberts, Carsten Zothner, Andres Merits, Mark Harris
Chikungunya virus (CHIKV), a mosquito-borne alphavirus, causes febrile disease, muscle and joint pain, which can become chronic in some individuals. The non-structural protein 3 (nsP3) plays essential roles during infection, but a complete understanding of its function is lacking. Here we used a microscopy-based approach to image CHIKV nsP3 inside human cells. The SNAP system consists of a self-labelling enzyme tag, which catalyses the covalent linking of exogenously supplemented synthetic ligands. Genetic insertion of this tag resulted in viable replicons and specific labelling while preserving the effect of nsP3 on stress granule responses and co-localisation with GTPase Activating Protein (SH3 domain) Binding Proteins (G3BPs)...
July 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28720468/production-of-a-chikungunya-vaccine-using-a-cho-cell-and-attenuated-viral-based-platform-technology
#13
Preethi Eldi, Tamara H Cooper, Liang Liu, Natalie A Prow, Kerrilyn R Diener, Paul M Howley, Andreas Suhrbier, John D Hayball
Vaccinia-based systems have been extensively explored for the development of recombinant vaccines. Herein we describe an innovative vaccinia virus (VACV)-derived vaccine platform technology termed Sementis Copenhagen Vector (SCV), which was rendered multiplication-defective by targeted deletion of the essential viral assembly gene D13L. A SCV cell substrate line was developed for SCV vaccine production by engineering CHO cells to express D13 and the VACV host-range factor CP77, because CHO cells are routinely used for manufacture of biologics...
July 15, 2017: Molecular Therapy: the Journal of the American Society of Gene Therapy
https://www.readbyqxmd.com/read/28719301/development-of-a-real-time-reverse-transcription-polymerase-chain-reaction-for-o-nyong-nyong-virus-and-evaluation-with-clinical-and-mosquito-specimens-from-kenya
#14
Jesse Waggoner, Claire Jane Heath, Bryson Ndenga, Francis Mutuku, Malaya K Sahoo, Alisha Mohamed-Hadley, John Vulule, Dunstan Mukoko, A Desiree LaBeaud, Benjamin A Pinsky
O'nyong-nyong virus (ONNV), an alphavirus closely related to chikungunya virus (CHIKV), has been the documented cause of two large outbreaks in east Africa; however, little is known about the contribution of ONNV to cases of acute febrile illness during interepidemic periods. An ONNV real-time reverse transcription polymerase chain reaction (rRT-PCR) was developed and evaluated using clinical and mosquito pool samples. The ONNV rRT-PCR linear range extended from 8.0 to 2.0 log10 copies/μL, and the lower limit of 95% detection was 22...
July 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28702473/malaria-and-chikungunya-detected-using-molecular-diagnostics-among-febrile-kenyan-children
#15
Jesse Waggoner, Julie Brichard, Francis Mutuku, Bryson Ndenga, Claire Jane Heath, Alisha Mohamed-Hadley, Malaya K Sahoo, John Vulule, Martina Lefterova, Niaz Banaei, Dunstan Mukoko, Benjamin A Pinsky, A Desiree LaBeaud
BACKGROUND: In sub-Saharan Africa, malaria is frequently overdiagnosed as the cause of an undifferentiated febrile illness, whereas arboviral illnesses are presumed to be underdiagnosed. METHODS: Sera from 385 febrile Kenyan children, who presented to 1 of 4 clinical sites, were tested using microscopy and real-time molecular assays for dengue virus (DENV), chikungunya virus (CHIKV), malaria, and Leptospira. RESULTS: Malaria was the primary clinical diagnosis for 254 patients, and an arboviral infection (DENV or CHIKV) was the primary diagnosis for 93 patients...
2017: Open Forum Infectious Diseases
https://www.readbyqxmd.com/read/28700066/encephalitis-associated-with-inappropriate-antidiuretic-hormone-secretion-due-to-chikungunya-infection-in-recife-state-of-pernambuco-brazil
#16
Norma Lucena-Silva, Maria Elisa Lucena Sales de Melo Assunção, Frederico Antônio Pereira Ramos, Fernanda Azevedo, Ronaldo Lessa, Marli Tenório Cordeiro, Carlos Alexandre Antunes de Brito
The symptoms of chikungunya virus (CHIKV) infection include fever, headache, muscle aches, skin rash, and polyarthralgia, characterized by intense pain, edema, and temporary functional impairment. This is the first report of encephalitis caused by CHIKV infection associated with an atypical presentation of syndrome of inappropriate antidiuretic hormone secretion, evolving to cognitive impairment and apraxia of speech.
May 2017: Revista da Sociedade Brasileira de Medicina Tropical
https://www.readbyqxmd.com/read/28699858/bovine-lactoferrin-activity-against-chikungunya-and-zika-viruses
#17
Carlos A M Carvalho, Samir M M Casseb, Rafael B Gonçalves, Eliana V P Silva, Andre M O Gomes, Pedro F C Vasconcelos
Chikungunya (CHIKV) and Zika (ZIKV) viruses are arboviruses which have recently broken their sylvatic isolation and gone on to spread rampantly among humans in some urban areas of the world, especially in Latin America. Given the lack of effective interventions against such viruses, the aim of this work was to evaluate the antiviral potential of bovine lactoferrin (bLf) in their infections. Through viability, plaque, immunofluorescence and nucleic acid quantification assays, our data show that bLf exerts a dose-dependent strong inhibitory effect on the infection of Vero cells by the aforementioned arboviruses, reducing their infection efficiency by up to nearly 80 %, with no expressive cytotoxicity, and that such antiviral activity occurs at the levels of input and output of virus particles...
July 12, 2017: Journal of General Virology
https://www.readbyqxmd.com/read/28690146/asian-genotype-of-chikungunya-virus-circulating-in-venezuela-during-2014
#18
Daría Camacho, Jesús Reyes, Ana Negredo, Lourdes Hernández, María Sánchez-Seco, Guillermo Comach
Chikungunya virus emerged on Saint-Martin Island in the Caribbean in late 2013. Since then in July of 2104 Venezuela reported autochthonous cases. This study reports the first phylogenetic characterization of CHIKV autochthonous cases in Venezuela, 2014. The phylogenetic analysis showed that the CHIKV circulating in Venezuela (Aragua state) belong to the Asian genotype (Caribbean clade) and it is related to viruses that circulated in the same year in the Caribbean.
July 6, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28673021/emergence-of-west-nile-virus-in-west-bengal-india-a-new-report
#19
Tanuja Khatun, Shyamalendu Chatterjee
Background: The ICMR virus unit in Kolkata functions as an Appex Referral Laboratory for the detection of dengue (DENV) and chikungunya (CHIKV) infections in the eastern part of India. In spite of efforts for confirmatory diagnosis, some samples remain undiagnosed every year. West Nile virus (WNV) infection may mimic either dengue (flavivirus) or chikungunya (alphavirus) like illness. WNV is endemic in the tropical region where its principal/potential vectors are Aedes and Culex. Methods: We explored the existence of WNV within undiagnosed samples to identify the emergence of a new public health problem...
April 1, 2017: Transactions of the Royal Society of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28671832/isolation-of-premyrsinane-myrsinane-and-tigliane-diterpenoids-from-euphorbia-pithyusa-using-a-chikungunya-virus-cell-based-assay-and-analogue-annotation-by-molecular-networking
#20
Mélissa Esposito, Louis-Félix Nothias, Pascal Retailleau, Jean Costa, Fanny Roussi, Johan Neyts, Pieter Leyssen, David Touboul, Marc Litaudon, Julien Paolini
Six new premyrsinol esters (1-6) and one new myrsinol ester (8) were isolated from an aerial parts extract of Euphorbia pithyusa, together with a known premyrsinol (7) and two known dideoxyphorbol esters (9 and 10), following a bioactivity-guided purification procedure using a chikungunya virus (CHIKV) cell-based assay. The structures of the new diterpene esters (1-6 and 8) were elucidated by MS and NMR spectroscopic data interpretation. Compounds 1-10 were evaluated against CHIKV replication, and results showed that the 4β-dideoxyphorbol ester 10 was the most active compound, with an EC50 value of 4...
July 3, 2017: Journal of Natural Products
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