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https://www.readbyqxmd.com/read/28638845/detection-of-the-northeastern-african-rift-valley-fever-virus-lineage-during-the-2015-outbreak-in-mauritania
#1
Ndeye Sakha Bob, Hampâté Bâ, Gamou Fall, Elkhalil Ishagh, Mamadou Y Diallo, Abdourahmane Sow, Pape Mbacké Sembene, Ousmane Faye, Brahim El Kouri, Mohamed Lemine Sidi, Amadou Alpha Sall
BACKGROUND: Rift Valley fever (RVF) is an acute viral anthropozoonosis that causes epizootics and epidemics among livestock population and humans. Multiple emergences and reemergences of the virus have occurred in Mauritania over the last decade. This article describes the outbreak that occurred in 2015 in Mauritania and reports the results of serological and molecular investigations of blood samples collected from suspected RVF patients. METHODS: An RVF outbreak was reported from 14 September to 26 November 2015 in Mauritania...
2017: Open Forum Infectious Diseases
https://www.readbyqxmd.com/read/28638259/global-alert-zika-virus-an-emerging-arbovirus
#2
REVIEW
Zulal Ozkurt, Esra Cinar Tanriverdi
Zika virus (ZIKV) is an arbovirus of the Flavivirus genus, and it has an envelope and a single RNA molecule. In early 2016, the World Health Organization declared ZIKV infection to be an emerging global health threat. The major transmission route of the virus to humans is Aedes mosquitoes. ZIKV can be transmitted between humans by transplacental, perinatal, and sexual routes and via blood and body fluids. ZIKV infection usually results in a mild and self-limiting disease with low-grade fever, conjunctivitis, and periorbital edema...
June 2017: Eurasian Journal of Medicine
https://www.readbyqxmd.com/read/28617719/guillain-barr%C3%A3-syndrome-and-zika-virus-outbreaks
#3
Osvaldo J M Nascimento, Ivan R F da Silva
PURPOSE OF REVIEW: Arboviruses have been associated with central and peripheral nervous system injuries, in special the flaviviruses. Guillain-Barré syndrome (GBS), transverse myelitis, meningoencephalitis, ophthalmological manifestations, and other neurological complications have been recently associated to Zika virus (ZIKV) infection. In this review, we aim to analyze the epidemiological aspects, possible pathophysiology, and what we have learned about the clinical and laboratory findings, as well as treatment of patients with ZIKV-associated neurological complications...
June 14, 2017: Current Opinion in Neurology
https://www.readbyqxmd.com/read/28616473/ten-years-of-the-tiger-aedes-albopictus-presence-in-australia-since-its-discovery-in-the-torres-strait-in-2005
#4
REVIEW
Andrew F van den Hurk, Jay Nicholson, Nigel W Beebe, Joe Davis, Odwell M Muzari, Richard C Russell, Gregor J Devine, Scott A Ritchie
The "Asian tiger mosquito", Aedes albopictus, is highly invasive, an aggressive biter and a major arbovirus vector. It is not currently present on mainland Australia despite being intercepted on numerous occasions at international ports and infesting the Torres Strait of Australia since at least 2004. In the current paper, we describe the invasion and current status of Ae. albopictus in the Torres Strait, as well as research conducted to assess the threat of this species becoming established in arbovirus transmission cycles on the Australian mainland...
December 2016: One Health
https://www.readbyqxmd.com/read/28614394/first-report-of-naturally-infected-aedes-aegypti-with-chikungunya-virus-genotype-ecsa-in-the-americas
#5
André Luis Costa-da-Silva, Rafaella Sayuri Ioshino, Vivian Petersen, Antonio Fernando Lima, Marielton Dos Passos Cunha, Michael R Wiley, Jason T Ladner, Karla Prieto, Gustavo Palacios, Danuza Duarte Costa, Lincoln Suesdek, Paolo Marinho de Andrade Zanotto, Margareth Lara Capurro
BACKGROUND: The worldwide expansion of new emergent arboviruses such as Chikungunya and Zika reinforces the importance in understanding the role of mosquito species in spreading these pathogens in affected regions. This knowledge is essential for developing effective programs based on species specificity to avoid the establishment of endemic transmission cycles sustained by the identified local vectors. Although the first autochthonous transmission of Chikungunya virus was described in 2014 in the north of Brazil, the main outbreaks were reported in 2015 and 2016 in the northeast of Brazil...
June 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28606643/diagnostic-accuracy-of-a-rapid-e1-antigen-test-for-chikungunya-virus-infection-in-a-reference-setting
#6
Ralph Huits, Tamaki Okabayashi, Lieselotte Cnops, Barbara Barbé, Riemsdijk Van Den Berg, Koen Bartholomeeusen, Kevin K Ariën, Jan Jacobs, Emmanuel Bottieau, Emi E Nakayama, Tatsuo Shioda, Marjan Van Esbroeck
OBJECTIVES: Rapid diagnostic tests targeting virus-specific antigen could significantly enhance the diagnostic capacity for chikungunya virus infections. We evaluated the accuracy of an immunochromatographic antigen test for the diagnosis of chikungunya in a reference laboratory for arboviruses. METHODS: an immunochromatographic rapid test that uses mouse monoclonal antibodies as a tracer against the E1-envelope protein of chikungunya (ARKRAY, Inc. Kyoto, Japan) was evaluated...
June 9, 2017: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/28601976/zika-virus-as-an-emerging-neuropathogen-mechanisms-of-neurovirulence-and-neuro-immune-interactions
#7
REVIEW
Gerwyn Morris, Tatiana Barichello, Brendon Stubbs, Cristiano A Köhler, André F Carvalho, Michael Maes
Zika virus (ZIKV) is an emerging arbovirus of the genus Flaviviridae, which causes a febrile illness and has spread from across the Pacific to the Americas in a short timeframe. Convincing evidence has implicated the ZIKV to incident cases of neonatal microcephaly and a set of neurodevelopmental abnormalities referred to as the congenital Zika virus syndrome. In addition, emerging data points to an association with the ZIKV and the development of the so-called Guillain-Barre syndrome, an acute autoimmune polyneuropathy...
June 11, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/28600536/imipramine-inhibits-chikungunya-virus-replication-in-human-skin-fibroblasts-through-interference-with-intracellular-cholesterol-trafficking
#8
Sineewanlaya Wichit, Rodolphe Hamel, Eric Bernard, Loïc Talignani, Fodé Diop, Pauline Ferraris, Florian Liegeois, Peeraya Ekchariyawat, Natthanej Luplertlop, Pornapat Surasombatpattana, Frédéric Thomas, Andres Merits, Valérie Choumet, Pierre Roques, Hans Yssel, Laurence Briant, Dorothée Missé
Chikungunya virus (CHIKV) is an emerging arbovirus of the Togaviridae family that poses a present worldwide threat to human in the absence of any licensed vaccine or antiviral treatment to control viral infection. Here, we show that compounds interfering with intracellular cholesterol transport have the capacity to inhibit CHIKV replication in human skin fibroblasts, a major viral entry site in the human host. Pretreatment of these cells with the class II cationic amphiphilic compound U18666A, or treatment with the FDA-approved antidepressant drug imipramine resulted in a near total inhibition of viral replication and production at the highest concentration used without any cytotoxic effects...
June 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28595631/isolation-of-tibet-orbivirus-from-culicoides-and-associated-infections-in-livestock-in-yunnan-china
#9
Jinglin Wang, Huachun Li, Yuwen He, Yang Zhou, Aiguo Xin, Defang Liao, Jinxin Meng
BACKGROUND: Culicoides-borne orbiviruses, such as bluetongue virus (BTV) and African horse sickness virus (AHSV), are important pathogens that cause animal epidemic diseases leading to significant loss of domestic animals. This study was conducted to identify Culicoides-borne arboviruses and to investigate the associated infections in local livestock in Yunnan, China. METHODS: Culicoides were collected overnight in Mangshi City using light traps during August 2013...
June 8, 2017: Virology Journal
https://www.readbyqxmd.com/read/28592296/pigsties-near-dwellings-as-a-potential-risk-factor-for-the-prevalence-of-japanese-encephalitis-virus-in-adult-in-shanxi-china
#10
Xiaojie Ren, Shihong Fu, Peifang Dai, Huanyu Wang, Yuanyuan Li, Xiaolong Li, Wenwen Lei, Xiaoyan Gao, Ying He, Zhi Lv, Jingxia Cheng, Guiqin Wang, Guodong Liang
BACKGROUND: The increasing trend of adult cases of Japanese encephalitis (JE) in China, particularly in northern China, has become an important public health issue. We conducted an epidemiological investigation in the south of Shanxi Province to examine the relationships between mosquitoes, Japanese encephalitis virus (JEV), and adult JE cases. METHODS: Mosquito specimens were collected from the courtyards of farmers' households and pig farms in Shanxi Province...
June 8, 2017: Infectious Diseases of Poverty
https://www.readbyqxmd.com/read/28591313/multiplexed-reverse-transcription-real-time-polymerase-chain-reaction-for-simultaneous-detection-of-mayaro-oropouche-and-oropouche-like-viruses
#11
Felipe Gomes Naveca, Valdinete Alves do Nascimento, Victor Costa de Souza, Bruno Tardelli Diniz Nunes, Daniela Sueli Guerreiro Rodrigues, Pedro Fernando da Costa Vasconcelos
We describe a sensitive method for simultaneous detection of Oropouche and Oropouche-like viruses carrying the Oropouche S segment, as well as the Mayaro virus, using a multiplexed one-step reverse transcription real-time polymerase chain reaction (RT-qPCR). A chimeric plasmid containing both Mayaro and Oropouche targets was designed and evaluated for the in vitro production of transcribed RNA, which could be easily used as a non-infectious external control. To track false-negative results due to PCR inhibition or equipment malfunction, the MS2 bacteriophage was also included in the multiplex assay as an internal positive control...
July 2017: Memórias do Instituto Oswaldo Cruz
https://www.readbyqxmd.com/read/28579869/management-of-viral-central-nervous-system-infections-a-primer-for-clinicians
#12
REVIEW
P Brandon Bookstaver, Phillip L Mohorn, Ansal Shah, Lauren D Tesh, April M Quidley, Ravish Kothari, Christopher M Bland, Sharon Weissman
Viruses are a common cause of central nervous system (CNS) infections with many host, agent, and environmental factors influencing the expression of viral diseases. Viruses can be responsible for CNS disease through a variety of mechanisms including direct infection and replication within the CNS resulting in encephalitis, infection limited to the meninges, or immune-related processes such as acute disseminated encephalomyelitis. Common pathogens including herpes simplex virus, varicella zoster, and enterovirus are responsible for the greatest number of cases in immunocompetent hosts...
2017: Journal of Central Nervous System Disease
https://www.readbyqxmd.com/read/28579764/is-zika-virus-an-emerging-torch-agent-an-invited-commentary
#13
Mohammad Zare Mehrjardi
Zika virus (ZIKV) is a mosquito-borne arbovirus from the family Flaviviridae, which had caused some epidemics since its discovery in 1947 without any significant impacts on public health. In 2015, however, a 20-fold increase in congenital microcephaly cases in northeastern Brazil was attributed to prenatally acquired ZIKV infection. Traditionally, TORCH agents have 4 common characteristics including causing a mild illness in infected mother, vertical transmission to fetus, developing several anomalies in the affected fetus, and in some instances, maternal therapy may not ameliorate fetal prognosis...
2017: Virology: Research and Treatment
https://www.readbyqxmd.com/read/28578775/corrigendum-to-functional-and-immunohistochemical-characterization-of-cceae3a-a-carboxylesterase-associated-with-temephos-resistance-in-the-major-arbovirus-vectors-aedes-aegypti-and-ae-albopictus-insect-biochem-mol-biol-74-july-2016-61-67
#14
Linda Grigoraki, Vassileia Balabanidou, Christos Meristoudis, Antonis Miridakis, Hilary Ranson, Luc Swevers, John Vontas
No abstract text is available yet for this article.
June 2017: Insect Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28578677/description-of-culicoides-culicoides-bysta-n-sp-a-new-member-of-the-pulicaris-group-diptera-ceratopogonidae-from-slovakia
#15
Adela Sarvašová, Alica Kočišová, Ermanno Candolfi, Bruno Mathieu
BACKGROUND: Species of the genus Culicoides Latreille, 1809 (Diptera: Ceratopogonidae) are mainly known as vectors of arboviruses such as bluetongue (BTV) and Schmallenberg (SBV). Among the known vectors, few species within the subgenus Culicoides Latreille, 1809 have been implicated in the transmission of BTV and SBV. Nevertheless, phylogenetic studies had revealed the presence of cryptic and undescribed species in Europe, raising questions about their vectorial role. A previous integrative study, associating morphology and barcode data, raised the hypothesis of the presence of undescribed species in Slovakia...
June 2, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28577575/identification-of-sympatric-cryptic-species-of-aedes-albopictus-subgroup-in-vietnam-new-perspectives-in-phylosymbiosis-of-insect-vector
#16
Guillaume Minard, Van Tran Van, Florence Hélène Tran, Christian Melaun, Sven Klimpel, Lisa Katharina Koch, Khanh Ly Huynh Kim, Trang Huynh Thi Thuy, Huu Tran Ngoc, Patrick Potier, Patrick Mavingui, Claire Valiente Moro
BACKGROUND: The Aedes (Stegomyia) albopictus subgroup includes 11 cryptic species of which Ae. albopictus is the most widely distributed. Its global expansion associated with a documented vector competence for several emerging arboviruses raise obvious concerns in the recently colonized regions. While several studies have provided important insights regarding medical importance of Ae. albopicus, the investigations of the other sibling species are scarce. In Asia, indigenous populations within the Ae...
June 2, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28577474/promiscuous-viruses-how-do-viruses-survive-multiple-unrelated-hosts
#17
REVIEW
Gregory D Ebel
Arthropod-borne viruses (arboviruses) require efficient replication in taxonomically divergent hosts in order to perpetuate in nature. This review discusses recent advances in our understanding of the phylogenetic position of arthropod-borne viruses relative to insect-specific viruses, which appear to be more common and ecological requirements for successful adoption of the 'arbovirus phenotype.' Several molecular and other mechanisms that permit replication in divergent hosts are also discussed.
May 31, 2017: Current Opinion in Virology
https://www.readbyqxmd.com/read/28577363/international-workshop-on-insecticide-resistance-in-vectors-of-arboviruses-december-2016-rio-de-janeiro-brazil
#18
Vincent Corbel, Dina M Fonseca, David Weetman, João Pinto, Nicole L Achee, Fabrice Chandre, Mamadou B Coulibaly, Isabelle Dusfour, John Grieco, Waraporn Juntarajumnong, Audrey Lenhart, Ademir J Martins, Catherine Moyes, Lee Ching Ng, Kamaraju Raghavendra, Hassan Vatandoost, John Vontas, Pie Muller, Shinji Kasai, Florence Fouque, Raman Velayudhan, Claire Durot, Jean-Philippe David
Vector-borne diseases transmitted by insect vectors such as mosquitoes occur in over 100 countries and affect almost half of the world's population. Dengue is currently the most prevalent arboviral disease but chikungunya, Zika and yellow fever show increasing prevalence and severity. Vector control, mainly by the use of insecticides, play a key role in disease prevention but the use of the same chemicals for more than 40 years, together with the dissemination of mosquitoes by trade and environmental changes, resulted in the global spread of insecticide resistance...
June 2, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28573028/detection-and-perception-of-generic-host-volatiles-by-mosquitoes-responses-to-co2-constrains-host-seeking-behaviour
#19
Shahid Majeed, Sharon Rose Hill, Teun Dekker, Rickard Ignell
Natural selection has favoured specialization in anthropophilic mosquito host choice, yet in the absence of human hosts, females feed on a selected range of vertebrates. For host recognition, we hypothesize that mosquitoes primarily rely on generic host volatiles. Detection and perception of such compounds would provide the mosquito with a flexible, yet constrained, odour coding system that could delineate host preference. In this study, we show that the quintessential generic volatile for host-seeking, carbon dioxide, activates and attracts the malaria mosquito, Anopheles coluzzii, and the arbovirus vectors, Aedes aegypti and Culex quinquefasciatus, within boundaries set by the dynamic range and coding capacity of the CO2-sensitive olfactory receptor neurons...
May 2017: Royal Society Open Science
https://www.readbyqxmd.com/read/28562637/identification-of-diagnostic-peptide-regions-that-distinguish-zika-virus-from-related-mosquito-borne-flaviviruses
#20
Alexandra J Lee, Roshni Bhattacharya, Richard H Scheuermann, Brett E Pickett
Zika virus (ZIKV) is a member of the Flavivirus genus of positive-sense single-stranded RNA viruses, which includes Dengue, West Nile, Yellow Fever, and other mosquito-borne arboviruses. Infection by ZIKV can be difficult to distinguish from infection by other mosquito-borne Flaviviruses due to high sequence similarity, serum antibody cross-reactivity, and virus co-circulation in endemic areas. Indeed, existing serological methods are not able to consistently differentiate ZIKV from other Flaviviruses, which makes it extremely difficult to accurately calculate the incidence rate of Zika-associated Guillain-Barre in adults, microcephaly in newborns, or asymptomatic infections within a geographical area...
2017: PloS One
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