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https://www.readbyqxmd.com/read/28734519/zika-virus-infection
#1
REVIEW
Debbie-Ann T Shirley, James P Nataro
In less than 2 years since entry into the Americas, we have witnessed the emergent spread of Zika virus into large subsets of immunologically naïve human populations and then encountered the devastating effects of microcephaly and brain anomalies that can arise from in utero infection with the virus. Diagnostic evaluation and management of affected infants continues to evolve as our understanding of Zika virus rapidly advances. The development of a safe and effective vaccine holds the potential to attenuate the spread of infection and limit the impact of congenital infection...
August 2017: Pediatric Clinics of North America
https://www.readbyqxmd.com/read/28734023/how-do-we-manage-blood-donors-and-recipients-after-a-positive-zika-screening-result
#2
Alexandra Jimenez, Beth H Shaz, Debra Kessler, Evan M Bloch
Zika virus (ZIKV) is a mosquito-borne flavivirus that is the focus of an ongoing pandemic. ZIKV is notable for its severe neurologic sequelae in babies born to infected mothers. High rates of subclinical infection, as evidenced by the finding of ZIKV RNA in asymptomatic donors, raise concerns of risk to the blood supply. To date, a total of four suspected cases of transfusion-transmitted ZIKV have been reported (all in Brazil), none of which were associated with clinical infection in the transfusion recipients...
July 21, 2017: Transfusion
https://www.readbyqxmd.com/read/28728996/conditions-for-success-of-engineered-underdominance-gene-drive-systems
#3
Matthew P Edgington, Luke S Alphey
Engineered underdominance is one of a number of different gene drive strategies that have been proposed for the genetic control of insect vectors of disease. Here we model a two-locus engineered underdominance based gene drive system that is based on the concept of mutually suppressing lethals. In such a system two genetic constructs are introduced, each possessing a lethal element and a suppressor of the lethal at the other locus. Specifically, we formulate and analyse a population genetics model of this system to assess when different combinations of release strategies (i...
July 17, 2017: Journal of Theoretical Biology
https://www.readbyqxmd.com/read/28728607/zika-virus-transmission-to-mouse-ear-by-mosquito-bite-a-laboratory-model-that-replicates-the-natural-transmission-process
#4
Nagila Francinete Costa Secundino, Barbara Aparecida Chaves, Alessandra Silva Orfano, Karine Renata Dias Silveira, Nilton Barnabe Rodrigues, Thais Bonifácio Campolina, Rafael Nacif-Pimenta, Luiz Eduardo Martinez Villegas, Breno Melo Silva, Marcus Vinícius Guimarães Lacerda, Douglas Eric Norris, Paulo Filemon Paolucci Pimenta
BACKGROUND: Zika disease has transformed into a serious global health problem due to the rapid spread of the arbovirus and alarming severity including congenital complications, microcephaly and Guillain-Barré syndrome. Zika virus (ZIKV) is primarily transmitted to humans through the bite of an infective mosquito, with Aedes aegypti being the main vector. METHODS: We successfully developed a ZIKV experimental transmission model by single infectious Ae. aegypti bite to a laboratory mouse using circulating Brazilian strains of both arbovirus and vector...
July 20, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28727779/contemporary-status-of-insecticide-resistance-in-the-major-aedes-vectors-of-arboviruses-infecting-humans
#5
REVIEW
Catherine L Moyes, John Vontas, Ademir J Martins, Lee Ching Ng, Sin Ying Koou, Isabelle Dusfour, Kamaraju Raghavendra, João Pinto, Vincent Corbel, Jean-Philippe David, David Weetman
Both Aedes aegytpi and Ae. albopictus are major vectors of 5 important arboviruses (namely chikungunya virus, dengue virus, Rift Valley fever virus, yellow fever virus, and Zika virus), making these mosquitoes an important factor in the worldwide burden of infectious disease. Vector control using insecticides coupled with larval source reduction is critical to control the transmission of these viruses to humans but is threatened by the emergence of insecticide resistance. Here, we review the available evidence for the geographical distribution of insecticide resistance in these 2 major vectors worldwide and map the data collated for the 4 main classes of neurotoxic insecticide (carbamates, organochlorines, organophosphates, and pyrethroids)...
July 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28727526/zika-and-reproductive-rights-in-brazil-challenge-to-the-right-to-health
#6
Pablo K Valente
The Zika virus epidemic rapidly spread across Brazil and Latin America, gaining international attention because of the causal relationship between Zika and birth defects. The high number of cases in Brazil has been attributed to a failure of the state to contain the epidemic and protect the affected people, especially women. Therefore, the public health crisis created by Zika exposed a stark conflict between Brazil's constitutional right to health and the long-standing violation of reproductive rights in the country...
July 20, 2017: American Journal of Public Health
https://www.readbyqxmd.com/read/28726601/zika-virus-infection-in-patient-with-no-known-risk-factors-utah-usa-2016
#7
Elisabeth R Krow-Lucal, Shannon A Novosad, Angela C Dunn, Carolyn R Brent, Harry M Savage, Ary Faraji, Dallin Peterson, Andrew Dibbs, Brook Vietor, Kimberly Christensen, Janeen J Laven, Marvin S Godsey, Bryan Christensen, Brigette Beyer, Margaret M Cortese, Nina C Johnson, Amanda J Panella, Brad J Biggerstaff, Michael Rubin, Scott K Fridkin, J Erin Staples, Allyn K Nakashima
In 2016, Zika virus disease developed in a man (patient A) who had no known risk factors beyond caring for a relative who died of this disease (index patient). We investigated the source of infection for patient A by surveying other family contacts, healthcare personnel, and community members, and testing samples for Zika virus. We identified 19 family contacts who had similar exposures to the index patient; 86 healthcare personnel had contact with the index patient, including 57 (66%) who had contact with body fluids...
August 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28724972/asymptomatic-transmission-and-the-dynamics-of-zika-infection
#8
Seyed M Moghadas, Affan Shoukat, Aquino L Espindola, Rafael S Pereira, Fatima Abdirizak, Marek Laskowski, Cecile Viboud, Gerardo Chowell
Following the 2013-14 outbreak in French Polynesia, the Zika virus (ZIKV) epidemic spread widely to many countries where Aedes Aegypti as the main transmitting vector is endemic. The lack of a second wave of ZIKV infection in most affected regions may suggest that a sufficiently high level of herd immunity was reached during the first wave. We developed an agent-based transmission model to investigate the role of asymptomatic infection on the likelihood of observing a second wave, while accounting for its relative transmissibility...
July 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28724472/appraisal-of-the-preparedness-of-midwives-and-nurses-in-bahrain-to-conduct-early-screening-for-zika-virus-infection-in-pregnant-women
#9
Asokan G V, Mariam Mohammed Baqer Nama, Feryal Juma Salman, Zainab Habib Ali AlGhareeb, Ali Moosa Almoosawi, Ridha Abdulla Al Hammam, Muyssar Sabri Awadhalla
OBJECTIVE: To appraise the awareness and knowledge levels of midwives and nurses concerning early screening for Zika virus (ZIKV) infection among pregnant women attending health care facilities in Bahrain. METHODS: This was a cross-sectional, purposely chosen study of Bahraini and expatriate midwives, nurses, and supervisors employed in gynecology/obstetrics and labor wards of Salmanya hospital, a maternity hospital, 4 private hospitals, and health centers in Bahrain...
July 20, 2017: Disaster Medicine and Public Health Preparedness
https://www.readbyqxmd.com/read/28724343/vero-cell-technology-for-rapid-development-of-inactivated-whole-virus-vaccines-for-emerging-viral-diseases
#10
P Noel Barrett, Sara J Terpening, Doris Snow, Ronald R Cobb, Otfried Kistner
Rapid development and production of vaccines against emerging diseases requires well established, validated, robust technologies to allow industrial scale production and accelerated licensure of products. Areas covered: A versatile Vero cell platform has been developed and utilized to deliver a wide range of candidate and licensed vaccines against emerging viral diseases. This platform builds on the 35 years' experience and safety record with inactivated whole virus vaccines such as polio vaccine. The current platform has been optimized to include a novel double inactivation procedure in order to ensure a highly robust inactivation procedure for novel emerging viruses...
July 20, 2017: Expert Review of Vaccines
https://www.readbyqxmd.com/read/28724012/health-surveillance-and-response-on-a-regional-scale-a-preliminary-study-of-the-zika-virus-fever-case
#11
Flávia Thedim Costa Bueno
Although awareness of the Zika virus has existed since the 1950s, only recently has it attracted the interest of the international community. In 2015 and 2016, the virus spread throughout Brazil and suspicions on the possible relation between parallel increases in neurological disorders and the infection arose. By November 2015, this concern had developed into a National Public Health Emergency. On February 1, 2016, WHO formally declared its suspicion that this was a Public Health Emergency of International Concern (PHEIC), and sent a response in accordance with International Health Regulations (2005)...
July 2017: Ciência & Saúde Coletiva
https://www.readbyqxmd.com/read/28722808/an-examination-of-the-effect-of-aerosolized-permanone-insecticide-on-zebra-finch-susceptibility-to-west-nile-virus
#12
Mark D Jankowski, Murray E Moore, Erik K Hofmeister
West Nile virus is primarily maintained cryptically primarily in avian (Passerine) populations where it is transmitted by Culex spp. mosquitoes. Mosquito control measures currently include physical activities to reduce mosquito breeding sites, the application of mosquito larvicides, or aerosolized insecticides to kill adults (adulticides) when arboviral diseases such as West Nile virus (WNV) or Zika virus are detected in mosquito populations. Organochlorine, organohosphorus, carbamate and pyrethroid insecticides are often used...
July 19, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/28722641/diagnostic-validation-of-the-realstar-%C3%A2-zika-virus-reverse-transcription-polymerase-chain-reaction-kit-for-detection-of-zika-virus-rna-in-urine-and-serum-specimens
#13
Stephan Ölschläger, Antoine Enfissi, Mareen Zaruba, Mirdad Kazanji, Dominique Rousset
With the Zika virus outbreak in South America starting in 2015 and its potential to cause malformation of the fetus in infected women, the need for diagnostic methods became obvious. Until now, only limited data are available on the diagnostic performance of commercial kits. Here, we present data comparing the RealStar(®) Zika Virus RT-PCR Kit 1.0 for detection of Zika virus from 208 serum and urine samples collected in French Guiana with a reference method. Of these, 114 samples tested positive with the RealStar Kit and 111 with the reference method...
June 19, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28722623/the-use-of-xenosurveillance-to-detect-human-bacteria-parasites-and-viruses-in-mosquito-bloodmeals
#14
Joseph R Fauver, Alex Gendernalik, James Weger-Lucarelli, Nathan D Grubaugh, Doug E Brackney, Brian D Foy, Gregory D Ebel
Infectious disease surveillance is hindered by several factors, including limited infrastructure and geographic isolation of many resource-poor regions. In addition, the complexities of sample acquisition, processing, and analysis, even in developed regions, can be rate limiting. Therefore, new strategies to survey human populations for emerging pathogens are necessary. Xenosurveillance is a method that utilizes mosquitoes as sampling devices to search for genetic signatures of pathogens in vertebrates. Previously we demonstrated that xenosurveillance can detect viral RNA in both laboratory and field settings...
May 30, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28722594/fatal-leptospira-spp-zika-virus-coinfection-puerto-rico-2016
#15
Paige Neaterour, Aidsa Rivera, Renee L Galloway, Myriam Garcia Negrón, Brenda Rivera-Garcia, Tyler M Sharp
Coinfection with pathogens that cause acute febrile illness (AFI) can complicate patient diagnosis and management. This report describes a fatal case of Leptospira spp./Zika virus (ZIKV) coinfection in Puerto Rico. The patient presented with a 5-day history of AFI; reported behavioral risk factors for leptospirosis; was diagnosed with possible leptospirosis, dengue, chikungunya, or ZIKV disease; and received appropriate treatment of leptospirosis and dengue. Following a 3-day hospitalization, the patient died due to acute gastrointestinal hemorrhage, and kidney and liver failure...
June 26, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28720531/molecular-cloning-and-characterization-of-the-genes-encoding-the-proteins-of-zika-virus
#16
Wangheng Hou, Ruth Cruz-Cosme, Najealicka Armstrong, Lilian Akello Obwolo, Fayuan Wen, Wenhui Hu, Min-Hua Luo, Qiyi Tang
Zika virus (ZIKV) encodes a precursor protein (also called polyprotein) of about 3424 amino acids that is processed by proteases to generate 10 mature proteins and a small peptide. In the present study, we characterized the chemical features, suborganelle distribution and potential function of each protein using Flag-tagged protein expression system. Western blot analysis revealed the molecular weight of the proteins and the polymerization of E, NS1, and NS3 proteins. In addition, we performed multi-labeled fluorescent immunocytochemistry and subcellular fractionation to determine the subcellular localization of these proteins in host cells...
July 15, 2017: Gene
https://www.readbyqxmd.com/read/28719506/zika-virus-associated-ocular-and-neurologic-disorders-the-emergence-of-new-evidence
#17
Fatih Şahiner, Ali Korhan Siğ, Ümit Savaşçi, Kemal Tekin, Fahrettin Akay
BACKGROUND: It has been approximately 70 years since the discovery of the Zika virus (ZIKV). It had been established that the virus causes mild infections, and is confined to Africa and Asia; however, major changes in the clinical and epidemiologic patterns of ZIKV infection have occurred in recent years. The virus has attracted intense interest because of the possible association of several autoimmune and neurodevelopmental disorders. METHODS: We present a summary of the articles that attempt to explain the ZIKV unknowns, and strengthen the association with some disorders that are thought to be related to ZIKV, by describing the discovery milestones from the initial identification of the virus to the present day...
July 13, 2017: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/28719335/experimental-infection-with-and-maintenance-of-cell-fusing-agent-virus-flavivirus-in-aedes-aegypti
#18
Maria Angelica Contreras-Gutierrez, Hilda Guzman, Saravanan Thangamani, Nikos Vasilakis, Robert B Tesh
During the past two decades, there has been a dramatic increase in the recognition and characterization of novel insect-specific flaviviruses (ISFVs). Some of these agents are closely related to important mosquito-borne flavivirus pathogens. Results of experimental studies suggest that mosquitoes and mosquito cell cultures infected with some ISFVs are refractory to superinfection with related flavivirus pathogens; and it has been proposed that ISFVs potentially could be used to alter the vector competence of mosquitoes and reduce transmission of specific flavivirus pathogens, such as dengue, West Nile, or Zika viruses...
July 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28719330/case-report-microcephaly-in-twins-due-to-the-zika-virus
#19
Victor S Santos, Sheila J G Oliveira, Ricardo Q Gurgel, Dorothy R R Lima, Cliomar A Dos Santos, Paulo R S Martins-Filho
Recent studies have demonstrated an association between congenital Zika virus (ZIKV) infection and microcephaly; however, to date, there have been no reports on the consequences of ZIKV infection on fetuses in twin pregnancies. Herein, we reported on the first case of a monochorionic diamniotic (MCDA) twin pregnancy having ZIKV-related microcephaly. Our findings suggested that, in an MCDA twin pregnancy, the ZIKV may cause infection in both fetuses, resulting in severe abnormalities in the central nervous system due to neural cell destruction and the disruption of the normal development processes of the brain...
July 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28719313/keynote-address-november-2016-zika-virus-disease-in-the-americas-a-storm-in-the-making
#20
Carissa Etienne, Thais Dos Santos, Marcos A Espinal
More than 700,000 cases of Zika virus (ZIKAV) disease have been officially reported to the Pan American Health Organization (PAHO) from 48 countries and territories of the Americas. The response led by the PAHO and partners suggests major lessons of this outbreak. A seemingly innocuous pathogen became the new villain, causing fear, economic losses and, most importantly, debilitating birth defects and neurological problems, reaffirming the well-known war principle of never to underestimate one's opponent. The ZIKAV tested public health capacities under the International Health Regulations, highlighting the need for continued investment in health security...
July 2017: American Journal of Tropical Medicine and Hygiene
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