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Zika infections and complications

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https://www.readbyqxmd.com/read/28447317/neuroimaging-findings-of-postnatally-acquired-zika-virus-infection-a-pictorial-essay
#1
Mohammad Zare Mehrjardi, Guillaume Carteaux, Andrea Poretti, Morteza Sanei Taheri, Sonia Bermudez, Heron Werner, Luiz Celso Hygino da Cruz
Zika virus (ZIKV) is a mosquito-borne arbovirus from the Flaviviridae family, first discovered in 1947. There has been no report of severe complications caused by this virus in humans until recently. However, it is confirmed now that prenatally acquired ZIKV infection may cause severe congenital brain abnormalities in the infected fetuses. In addition, there has been an increasing number of reports during recent years about the causal relationship between postnatally acquired ZIKV infection and severe neurologic complications (mostly immune-mediated ones)...
April 26, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28442607/n-methyl-d-aspartate-nmda-receptor-blockade-prevents-neuronal-death-induced-by-zika-virus-infection
#2
Vivian V Costa, Juliana L Del Sarto, Rebeca F Rocha, Flavia R Silva, Juliana G Doria, Isabella G Olmo, Rafael E Marques, Celso M Queiroz-Junior, Giselle Foureaux, Julia Maria S Araújo, Allysson Cramer, Ana Luíza C V Real, Lucas S Ribeiro, Silvia I Sardi, Anderson J Ferreira, Fabiana S Machado, Antônio C de Oliveira, Antônio L Teixeira, Helder I Nakaya, Danielle G Souza, Fabiola M Ribeiro, Mauro M Teixeira
Zika virus (ZIKV) infection is a global health emergency that causes significant neurodegeneration. Neurodegenerative processes may be exacerbated by N-methyl-d-aspartate receptor (NMDAR)-dependent neuronal excitoxicity. Here, we have exploited the hypothesis that ZIKV-induced neurodegeneration can be rescued by blocking NMDA overstimulation with memantine. Our results show that ZIKV actively replicates in primary neurons and that virus replication is directly associated with massive neuronal cell death. Interestingly, treatment with memantine or other NMDAR blockers, including dizocilpine (MK-801), agmatine sulfate, or ifenprodil, prevents neuronal death without interfering with the ability of ZIKV to replicate in these cells...
April 25, 2017: MBio
https://www.readbyqxmd.com/read/28442104/zika-virus-infection-and-its-emerging-trends-in-southeast-asia
#3
REVIEW
Ahmad Ruzain Salehuddin, Haszianaliza Haslan, Norshalizah Mamikutty, Nurul Hannim Zaidun, Mohamad Fairuz Azmi, Mohamad Mu'izuddin Senin, Syed Baharom Syed Ahmad Fuad, Zar Chi Thent
Zika virus is a mosquito-borne flavivirus that represents a public health emergency at the ongoing epidemic. Previously, this rare virus was limited to sporadic cases in Africa and Asia until its emergence in Brazil, South America in 2015, where it rapidly spread throughout the world. Recently, a high number of cases were reported in Singapore and other Southeast Asia countries. A combination of factors explains the current Zika virus outbreak although it is highly likely that the changes in the climate and high frequency of travelling contribute to the spread of Aedes vector carrying the Zika virus mainly to the tropical climate countries such as the Southeast Asia...
March 2017: Asian Pacific Journal of Tropical Medicine
https://www.readbyqxmd.com/read/28422757/cross-reactive-dengue-human-monoclonal-antibody-prevents-severe-pathologies-and-death-from-zika-virus-infections
#4
Yiu-Wing Kam, Cheryl Yi-Pin Lee, Teck-Hui Teo, Shanshan W Howland, Siti Naqiah Amrun, Fok-Moon Lum, Peter See, Nicholas Qing-Rong Kng, Roland G Huber, Mei-Hui Xu, Heng-Liang Tan, Andre Choo, Sebastian Maurer-Stroh, Florent Ginhoux, Katja Fink, Cheng-I Wang, Lisa F P Ng, Laurent Rénia
Zika virus (ZIKV) infections have been linked with neurological complications and congenital Zika syndrome. Given the high level of homology between ZIKV and the related flavivirus dengue virus (DENV), we investigated the level of cross-reactivity with ZIKV using a panel of DENV human mAbs. A majority of the mAbs showed binding to ZIKV virions, with several exhibiting neutralizing capacities against ZIKV in vitro. Three of the best ZIKV-neutralizing mAbs were found to recognize diverse epitopes on the envelope (E) glycoprotein: the highly conserved fusion-loop peptide, a conformation-specific epitope on the E monomer, and a quaternary epitope on the virion surface...
April 20, 2017: JCI Insight
https://www.readbyqxmd.com/read/28401481/why-is-aedes-aegypti-linnaeus-so-successful-as-a-species
#5
REVIEW
F D Carvalho, L A Moreira
Diseases transmitted by mosquitoes impose enormous burden towards human morbidity and mortality. Over the last three decades, Brazil has suffered from severe Dengue epidemics. In September 2014, this situation is further complicated by the introduction of two other viruses, Zika and Chikungunya, placing Brazil in a triple epidemic. In this article, we discuss the biology of Aedes aegypti Linnaeus, and the principal initiatives currently used to control mosquito populations and the diseases they transmit. Aedes aegypti has broad global distribution and is involved in the transmission of various arboviral diseases such as Dengue, Zika, and Chikungunya...
April 11, 2017: Neotropical Entomology
https://www.readbyqxmd.com/read/28397799/an-mrna-based-vaccine-strategy-against-zika
#6
Gary Wong, George F Gao
Infections with Zika virus are strongly associated with complications such as congenital microcephaly and can trigger Guillain-Barré syndrome in humans, highlighting the urgent need for a safe, efficacious vaccine as a preventative countermeasure. In a recent paper published in Cell, Richner et al. generated a lipid nanoparticle encapsulated modified mRNA vaccine encoding the prM and E genes from Zika virus, which showed protection and sterilizing immunity in immunocompetent mice.
April 11, 2017: Cell Research
https://www.readbyqxmd.com/read/28393598/-zika-virus-infection-in-pregnancy
#7
Gabriella Varjasi, Róbert Póka
The Zika virus is a flavivirus spread by mosquitoes. Its primary vectors are the Aedes aegypti and the Aedes albopictus. Before 2007 it sporadically caused benign morbidity. Since 2015, it started spreading "explosively" in America, especially in Brazil. In August 2016 they reported cases from New York and Poland, too. Most of the infections don't produce any symptoms, but can cause grave complications. The most important lesion is microcephalia that forms in fetuses. Microcephalia's most serious consequence is mental retardation, which puts great burden on both the family and the society...
April 2017: Orvosi Hetilap
https://www.readbyqxmd.com/read/28375541/unravelling-the-paediatric-and-perinatal-zika-virus-epidemic-through-population-based-research
#8
Cdc Christie, C Giaquinto
Zika virus epidemic now involves 72 countries, worldwide. Transmission is multimodal through mosquito bites and blood and body fluids. Zika virus causes Guillain Barre Syndrome syndrome and pregnancy complications including perinatal microcephaly. Diagnosis is complicated by subclinical infection in 80%, co-circulation with dengue and chikungunya fevers with similar presentations and cross-reactivity in serological tests. There is no cure, or preventive vaccine. Large population-based studies will help to elucidate ZIKV epidemiology, vertical transmission, risks to the fetus of maternal ZIKV infection and natural history of congenital and non-congenital ZIKV infection as provided by the activities in the "ZIKAction" research consortium in Latin America, Europe and the Caribbean, which was recently funded by the European Commission...
September 19, 2016: West Indian Medical Journal
https://www.readbyqxmd.com/read/28358795/zika-virus-transmission-region-of-the-americas-may-15-2015-december-15-2016
#9
Juniorcaius Ikejezie, Craig N Shapiro, Jisoo Kim, Monica Chiu, Maria Almiron, Ciro Ugarte, Marcos A Espinal, Sylvain Aldighieri
Zika virus, a mosquito-borne flavivirus that can cause rash with fever, emerged in the Region of the Americas on Easter Island, Chile, in 2014 and in northeast Brazil in 2015 (1). In response, in May 2015, the Pan American Health Organization (PAHO), which serves as the Regional Office of the Americas for the World Health Organization (WHO), issued recommendations to enhance surveillance for Zika virus. Subsequently, Brazilian investigators reported Guillain-Barré syndrome (GBS), which had been previously recognized among some patients with Zika virus disease, and identified an association between Zika virus infection during pregnancy and congenital microcephaly (2)...
March 31, 2017: MMWR. Morbidity and Mortality Weekly Report
https://www.readbyqxmd.com/read/28344900/temporal-patterns-and-geographic-heterogeneity-of-zika-virus-zikv-outbreaks-in-french-polynesia-and-central-america
#10
Ying-Hen Hsieh
BACKGROUND: Zika virus (ZIKV) transmission has been reported in 67 countries/territories in the Oceania region and the Americas since 2015, prompting the World Health Organization (WHO) to declare ZIKV as a Public Health Emergency of International Concern in February 2016, due to its strong association with medical complications such as microcephaly and Guillain-Barré Syndrome (GBS). However, a substantial gap in knowledge still exists regarding differing temporal pattern and potential of transmission of ZIKV in different regions of the world...
2017: PeerJ
https://www.readbyqxmd.com/read/28340908/preparing-the-united-states-for-zika-virus-pre-emptive-vector-control-and-personal-protection
#11
EDITORIAL
James H Diaz
Discovered in 1947 in a monkey in the Zika forest of Uganda, Zika virus was dismissed as a cause of a mild illness that was confined to Africa and Southeast Asia and transmitted by Aedes mosquitoes. In 2007, Zika virus appeared outside of its endemic borders in an outbreak on the South Pacific Island of Yap. In 2013, Zika virus was associated with a major neurological complication, Guillain-Barré syndrome, in a larger outbreak in the French Polynesian Islands. From the South Pacific, Zika invaded Brazil in 2015 and caused another severe neurological complication, fetal microcephaly...
December 2016: Wilderness & Environmental Medicine
https://www.readbyqxmd.com/read/28330900/adaptive-immune-responses-to-zika-virus-are-important-for-controlling-virus-infection-and-preventing-infection-in-brain-and-testes
#12
Clayton W Winkler, Lara M Myers, Tyson A Woods, Ronald J Messer, Aaron B Carmody, Kristin L McNally, Dana P Scott, Kim J Hasenkrug, Sonja M Best, Karin E Peterson
The recent association between Zika virus (ZIKV) and neurologic complications, including Guillain-Barré syndrome in adults and CNS abnormalities in fetuses, highlights the importance in understanding the immunological mechanisms controlling this emerging infection. Studies have indicated that ZIKV evades the human type I IFN response, suggesting a role for the adaptive immune response in resolving infection. However, the inability of ZIKV to antagonize the mouse IFN response renders the virus highly susceptible to circulating IFN in murine models...
March 22, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28318966/structural-biology-of-the-zika-virus
#13
REVIEW
Yi Shi, George F Gao
Zika virus (ZIKV), a Flaviviridae family member transmitted to humans by mosquitoes, has emerged as a major health concern. ZIKV infections can cause serious neurological complications in adults, and infection in pregnant women can cause congenital malformations, including fetal and newborn microcephaly. In response to this emerging concern, the structural virology field was quick to explore the features of ZIKV. These efforts have provided significant insights into ZIKV pathogenesis, and have identified targets for drug design...
March 15, 2017: Trends in Biochemical Sciences
https://www.readbyqxmd.com/read/28295400/paper-based-point-of-care-testing-for-cost-effective-diagnosis-of-acute-flavivirus-infections
#14
Frederic Bedin, Laurent Boulet, Elodie Voilin, Gerald Theillet, Agnes Rubens, Christine Rozand
Flavivirus infections are a serious healthcare concern in tropical and subtropical countries. Although well-established laboratory tests can provide early diagnosis of acute dengue or Zika infections, access to these tests is limited in developing countries, presenting an urgent need to develop simple, rapid, and robust diagnostic tools. Microfluidic Paper-based Analytical Devices (μPAD), are typically rapid, cost-effective, user-friendly, and they can be used as diagnostic tools for the diagnosis of these infections at Point of Care settings...
March 11, 2017: Journal of Medical Virology
https://www.readbyqxmd.com/read/28280063/surveillance-report-of-zika-virus-among-canadian-travellers-returning-from-the-americas
#15
Andrea K Boggild, Jennifer Geduld, Michael Libman, Cedric P Yansouni, Anne E McCarthy, Jan Hajek, Wayne Ghesquiere, Yazdan Mirzanejad, Jean Vincelette, Susan Kuhn, Pierre J Plourde, Sumontra Chakrabarti, David O Freedman, Kevin C Kain
BACKGROUND: Widespread transmission of Zika virus in the Americas has occurred since late 2015. We examined demographic and travel-related characteristics of returned Canadian travellers with Zika infection acquired in the Americas to illuminate risk factors for acquisition and the clinical spectrum. METHODS: We analyzed demographic and travel-related data for returned Canadian travellers who presented to a CanTravNet site between October 2015 and September 2016 for care of Zika virus acquired in the Americas...
March 6, 2017: CMAJ: Canadian Medical Association Journal, Journal de L'Association Medicale Canadienne
https://www.readbyqxmd.com/read/28270583/a-reverse-genetics-platform-that-spans-the-zika-virus-family-tree
#16
Douglas G Widman, Ellen Young, Boyd L Yount, Kenneth S Plante, Emily N Gallichotte, Derek L Carbaugh, Kayla M Peck, Jessica Plante, Jesica Swanstrom, Mark T Heise, Helen M Lazear, Ralph S Baric
Zika virus (ZIKV), a mosquito-borne flavivirus discovered in 1947, has only recently caused large outbreaks and emerged as a significant human pathogen. In 2015, ZIKV was detected in Brazil, and the resulting epidemic has spread throughout the Western Hemisphere. Severe complications from ZIKV infection include neurological disorders such as Guillain-Barré syndrome in adults and a variety of fetal abnormalities, including microcephaly, blindness, placental insufficiency, and fetal demise. There is an urgent need for tools and reagents to study the pathogenesis of epidemic ZIKV and for testing vaccines and antivirals...
March 7, 2017: MBio
https://www.readbyqxmd.com/read/28263141/use-of-blood-donor-screening-data-to-estimate-zika-virus-incidence-puerto-rico-april-august-2016
#17
Michelle S Chevalier, Brad J Biggerstaff, Sridhar V Basavaraju, M Cheryl Bañez Ocfemia, Jose O Alsina, Consuelo Climent-Peris, Robin R Moseley, Koo-Whang Chung, Brenda Rivera-García, Melissa Bello-Pagán, Lisa L Pate, Susan A Galel, Phillip Williamson, Matthew J Kuehnert
Puerto Rico has been heavily impacted by Zika virus, a mosquitoborne flavivirus that emerged in the Americas during 2015. Although most persons with Zika virus show no symptoms, the virus can cause neurologic and other complications, including fetal microcephaly. Local Zika virus transmission in Puerto Rico has been reported since December 2015. To prevent transfusion-associated transmission, local blood collection ceased in March 2016 but resumed in April 2016 after Zika virus screening of blood donations became available...
May 15, 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28259232/guillain-barr%C3%A3-syndrome
#18
REVIEW
Eelco F M Wijdicks, Christopher J Klein
Guillain-Barré syndrome is an acute inflammatory immune-mediated polyradiculoneuropathy presenting typically with tingling, progressive weakness, and pain. Variants and formes frustes may complicate recognition. The best known variant is the sensory ataxic form of Miller Fisher syndrome, which also affects the oculomotor nerves and the brain stem. Divergent pathologic mechanisms lead to demyelinating, axonal, or mixed demyelinating-axonal damage. In the demyelinating form, yet to be identified antigens are inferred by complement activation, myelin destruction, and macrophage-activated cleanup...
March 2017: Mayo Clinic Proceedings
https://www.readbyqxmd.com/read/28259231/zika-virus-meningoencephalitis-in-an-immunocompromised-patient
#19
Pedro V Schwartzmann, Leandra N Z Ramalho, Luciano Neder, Fernando C Vilar, Sílvia M Ayub-Ferreira, Marília F Romeiro, Osvaldo M Takayanagui, Antonio C Dos Santos, André Schmidt, Luiz T M Figueiredo, Ross Arena, Marcus V Simões
The World Health Organization considers the Zika virus (ZIKV) outbreak in the Americas a global public health emergency. The neurologic complications due to ZIKV infection comprise microcephaly, meningoencephalitis, and Guillain-Barré syndrome. We describe a fatal case of an adult patient receiving an immunosuppressive regimen following heart transplant. The patient was admitted with acute neurologic impairment and experienced progressive hemodynamic instability and mental deterioration that finally culminated in death...
March 2017: Mayo Clinic Proceedings
https://www.readbyqxmd.com/read/28250906/zika-virus-diseases-the-new-face-of-an-ancient-enemy-as-global-public-health-emergency-2016-brief-review-and-recent-updates
#20
REVIEW
Deepak Passi, Sarang Sharma, Shubha Ranjan Dutta, Musharib Ahmed
Zika virus (ZIKV) disease is caused by a virus transmitted by Aedes mosquito. It presents as flu-like symptoms lasting for 5-7 days and shows potential association with neurological and autoimmune complications such as congenital microcephaly and adult paralysis disorder, Guillain-Barré syndrome. Treatment measures are conservative as the disease is self-limiting. ZIKV earlier affected several tropical regions of Africa and Asia from 1951 to 2006. Subsequently, it moved out from these regions to land as outbreaks in Yap Island, French Polynesia, South America, and most recently in Brazil...
2017: International Journal of Preventive Medicine
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