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genotyping dengue 2

Dagwin Luang-Suarkia, Oriol Mitja, Timo Ernst, Shannon Bennett, Alfred Tay, Russell Hays, David W Smith, Allison Imrie
BACKGROUND: Dengue is endemic in the Western Pacific and Oceania and the region reports more than 200,000 cases annually. Outbreaks of dengue and severe dengue occur regularly and movement of virus throughout the region has been reported. Disease surveillance systems, however, in many areas are not fully established and dengue incidence is underreported. Dengue epidemiology is likely least understood in Papua New Guinea (PNG), where the prototype DENV-2 strain New Guinea C was first isolated by Sabin in 1944 but where routine surveillance is not undertaken and little incidence and prevalence data is available...
March 1, 2018: PLoS Neglected Tropical Diseases
Shubham Shrivastava, Divya Tiraki, Arundhati Diwan, Sanjay K Lalwani, Meera Modak, Akhilesh Chandra Mishra, Vidya A Arankalle
Dengue is the most common mosquito-borne viral infection in tropical and sub-tropical countries. In recent years, India has reported increased incidences of concurrent infection with multiple serotypes of dengue viruses (DENV). In the present study, we have characterized DENV circulating during a single season of 2016 in Pune, India. A total of 64 serum samples from NS1 ELISA positive dengue patients were used for PCR amplification of CprM region of the viral genome and sequencing. Phylogenetic analysis documented circulation of all the four DENV serotypes with predominance of DENV-2 (40...
2018: PloS One
J Wunderlich, R Acuña-Soto, W J Alonso
The number of dengue epidemics in Brazil has increased dramatically in the last 15 years. In this study, we analysed the seasonal patterns in the incidence of hospitalisations due to dengue across the different states of Brazil and compared these with the corresponding climatic patterns. We discovered that the seasonality of dengue hospitalisations in Brazil has a clear zonal gradient, characterised by the progression of primary peaks from West to East during the first half of the year, which may be associated with the increased vapour pressure and rainfall during this period, leading to increased mosquito abundance and activity...
December 13, 2017: Epidemiology and Infection
Ana Caroline Melo Dos Santos, Edilson Leite de Moura, Jean Moises Ferreira, Alexandre Wendell Araujo de Moura, Ailson Darlan Sales Ferreira, Rubens Pereira Bezerra, Diego de Siqueira Figueiredo, Karol Fireman de Farias, Tiago Gomes de Andrade, Elaine Virgínia Martins de Souza Figueiredo
OBJECTIVE: To evaluate gene polymorphisms and their association with susceptibility to dengue. METHODS: A retrospective case-control study was performed with 262 subjects, comprising 78 dengue fever (DF) patients, 49 dengue hemorrhagic fever (DHF) patients and 135 healthy controls. Genotypic and allelic profiles were identified using polymerase chain reaction based in real time and amplification-refractory mutation system. RESULTS: We observed a protective association of IL-10 (-819 C/T) C allele (P = 0...
November 2017: Asian Pacific Journal of Tropical Medicine
Jesse J Waggoner, Alejandra Rojas, Alisha Mohamed-Hadley, Yvalena Arévalo de Guillén, Benjamin A Pinsky
BACKGROUND: Mayaro virus (MAYV) causes an acute febrile illness which can be difficult to differentiate from dengue or chikungunya. MAYV RNA can be detected in plasma during the first 3-5days of illness, but only a single rRT-PCR has been fully evaluated in the literature. OBJECTIVES: To develop an rRT-PCR for MAYV and evaluate assay performance using human plasma and urine samples spiked with different MAYV strains. STUDY DESIGN: A MAYV rRT-PCR targeting a region of the 5'UTR and nsp1 gene was designed from the alignment of all complete-genome MAYV sequences to be compatible with existing laboratory protocols...
January 2018: Journal of Clinical Virology: the Official Publication of the Pan American Society for Clinical Virology
Andrés Gómez-Palacio, Juan Suaza-Vasco, Sandra Castaño, Omar Triana, Sandra Uribe
INTRODUCTION: Aedes aegypti and Ae. albopictus are recognized vectors of dengue, yellow fever, chikungunya and Zika arboviruses in several countries worldwide. In Colombia, Ae. albopictus geographical distribution has increased to include highly populated cities such as Cali and Medellín. Although this species has been frequently found in urban and semi-urban zones in the country, its role as vector of the dengue fever is poorly known. OBJECTIVE: To identify the presence of Ae...
March 29, 2017: Biomédica: Revista del Instituto Nacional de Salud
Prafulla Dutta, Siraj Ahmed Khan, Naba Kumar Hazarika, Sumi Chetry
PURPOSE: Northeast Region of India possesses an abundant number of Aedes mosquitoes, the common vector for Dengue and Chikungunya (CHIK). Dengue is reported every year from Assam, but active surveillance for CHIK virus (CHIKV) infection is lacking in this part of India. Therefore, this present study has been undertaken to detect any CHIKV infection during a dengue outbreak in Assam. MATERIALS AND METHODS: A total of 42 dengue negative samples collected from Guwahati were screened for the presence of CHIK IgM antibodies...
July 2017: Indian Journal of Medical Microbiology
Endang S Kusmintarsih, Rahma F Hayati, Oktaviani N Turnip, Benediktus Yohan, Suhestri Suryaningsih, Hery Pratiknyo, Dionisius Denis, R Tedjo Sasmono
BACKGROUND: Dengue is hyper-endemic in Indonesia. Purwokerto city in Central Java province is routinely ravaged by the disease. Despite the endemicity of dengue in this city, there is still no data on the virological aspects of dengue in the city. We conducted a molecular surveillance study of the circulating dengue viruses (DENV) in Purwokerto city to gain information on the virus origin, serotype and genotype distribution, and phylogenetic characteristics of DENV. METHODS: A cross-sectional dengue molecular surveillance study was conducted in Purwokerto...
October 19, 2017: Journal of Infection and Public Health
Yamilka Díaz, Julio Cisneros, Hilda Guzmán, Paola Cordoba, Jean-Paul Carrera, Brechla Moreno, Rubing Chen, Juan Castillo Mewa, Lourdes García, Lizbeth Cerezo, Amelia Travassos da Rosa, Nathan D Gundacker, Blas Armién, Scott C Weaver, Nikos Vasilakis, Sandra López-Vergès, Robert Tesh
The circulation of the South-east Asian/American (AS/AM) dengue 2 virus (DENV-2) genotype in the Americas has been associated with a high rate of severe disease. From 1993, the year DENV was reintroduced in Panama, until 2011 there were 29 dengue-associated deaths, 17 of which occurred in 2011, the most severe outbreak with a case fatality rate (CFR) of 44% (17 deaths out of 38 severe dengue cases). During this outbreak DENV-2 was reintroduced into the country, whereas over the prior five years DENV-1 and -3 were predominant...
October 3, 2017: Acta Tropica
A Gloria-Soria, P M Armstrong, J R Powell, P E Turner
Dengue fever is the most prevalent arthropod-transmitted viral disease worldwide, with endemic transmission restricted to tropical and subtropical regions of different temperature profiles. Temperature is epidemiologically relevant because it affects dengue infection rates in Aedes aegypti mosquitoes, the major vector of the dengue virus (DENV). Aedes aegypti populations are also known to vary in competence for different DENV genotypes. We assessed the effects of mosquito and virus genotype on DENV infection in the context of temperature by challenging Ae...
October 11, 2017: Proceedings. Biological Sciences
Gauri Awasthi, Suchi Tyagi, Vipin Kumar, Sandip Kumar Patel, Dharmendar Rojh, Vijeth Sakrappanavar, Sanjay Kumar Kochar, Arunansu Talukdar, Biaus Samanta, Aparup Das, Sanjeeva Srivastava, Swati Patankar
Haptoglobin (Hp), an acute phase inflammatory protein has been associated with malaria pathogenesis in several proteomics studies. The gene has two co-dominant alleles: Hp1 and Hp2 that produce three genotypes: Hp1/Hp1, Hp1/Hp2 and Hp2/Hp2. In this study, we perform validation of the proteomics data with Multiple Reaction Monitoring Mass Spectroscopy (MRM-MS). We further analyze the association of the Hp gene variants with severe, non-severe malaria and community (healthy) controls using genotyping PCRs and DNA sequencing...
September 27, 2017: Proteomics. Clinical Applications
Lei Luo, Li-Yun Jiang, Xin-Cai Xiao, Biao Di, Qin-Long Jing, Sheng-Yong Wang, Jin-Ling Tang, Ming Wang, Xiao-Ping Tang, Zhi-Cong Yang
BACKGROUND: Dengue was regarded as a mild epidemic in mainland China transmitted by Aedes albopictus. However, the 2014 record-breaking outbreak in Guangzhou could change the situation. In order to provide an early warning of epidemic trends and provide evidence for prevention and control strategies, we seek to characterize the 2014 outbreak through application of detailed cases and entomological data, as well as phylogenetic analysis of viral envelope (E) gene. METHODS: We used case survey data identified through the Notifiable Infectious Disease Report System, entomological surveillance and population serosurvey, along with laboratory testing for IgM/IgG, NS1, and isolation of viral samples followed by E gene sequencing and phylogenetic analysis to examine the epidemiological and molecular characteristics of the outbreak...
September 22, 2017: Infectious Diseases of Poverty
Estefanía Tittarelli, Silvina B Lusso, Stephanie Goya, Gabriel L Rojo, Mónica I Natale, Mariana Viegas, Alicia S Mistchenko, Laura E Valinotto
The largest outbreak of dengue in Buenos Aires, Argentina, occurred during 2016. Phylogenetic, phylodynamic, and phylogeographic analyses of 82 samples from dengue patients revealed co-circulation of 2 genotype V dengue virus lineages, suggesting that this virus has become endemic to the Buenos Aires metropolitan area.
October 2017: Emerging Infectious Diseases
Shetty Pooja, Sasidharanpillai Sabeena, Bhaskar Revti, Ramachandran Sanjay, Aithal Anjali, Kumar Rajendra, Sushama Aswathyraj, Dsouza Giselle, Maity Hindol, Govindakarnavar Arunkumar
Dengue is found to be the most prevalent arboviral disease affecting humans. Tropical and subtropical regions are at high risk of dengue virus infections. The clinical manifestations often range from mild fever to fever with hemorrhagic manifestations and shock. Since 2010, India is witnessing a marked increase in the number of Dengue Virus Serotype 1(DENV-1) apart from Dengue Virus 2 (DENV-2) and Dengue Virus 3 (DENV-3) Serotypes. The present study was undertaken to understand the circulating genotypes of DENV-1 in South West India by sequencing the envelope gene of DENV-1 samples representative of the time period 2014-2015...
September 11, 2017: Japanese Journal of Infectious Diseases
Evlyn Pless, Andrea Gloria-Soria, Benjamin R Evans, Vicki Kramer, Bethany G Bolling, Walter J Tabachnick, Jeffrey R Powell
The yellow fever mosquito Aedes aegypti inhabits much of the tropical and subtropical world and is a primary vector of dengue, Zika, and chikungunya viruses. Breeding populations of A. aegypti were first reported in California (CA) in 2013. Initial genetic analyses using 12 microsatellites on collections from Northern CA in 2013 indicated the South Central US region as the likely source of the introduction. We expanded genetic analyses of CA A. aegypti by: (a) examining additional Northern CA samples and including samples from Southern CA, (b) including more southern US populations for comparison, and (c) genotyping a subset of samples at 15,698 SNPs...
August 2017: PLoS Neglected Tropical Diseases
Caroline Xavier-Carvalho, Renata Duarte da Silva Cezar, Naishe Matos Freire, Carla Maria Mola de Vasconcelos, Victor Edgar Fiestas Solorzano, Thiago Gomes de Toledo-Pinto, Luciana Gomes Fialho, Rodrigo Feliciano do Carmo, Luydson Richardson Silva Vasconcelos, Marli Tenório Cordeiro, Paulo Baptista, Elzinandes Leal de Azeredo, Rivaldo Venâncio da Cunha, Luiz José de Souza, Antonio Guilherme Pacheco, Claire Fernandes Kubelka, Patrícia Muniz Mendes Freire de Moura, Milton Ozorio Moraes
Outbreaks of the Zika, dengue, and chikungunya viruses, especially in the Americas, pose a global threat due to their rapid spread and difficulty controlling the vector. Extreme phenotypes are often observed, from asymptomatic to severe clinical manifestations, which are well-studied in dengue. Host variations are also important contributors to disease outcomes, and many case-control studies have associated single nucleotide polymorphisms (SNPs) with severe dengue. Here, we found that the TC genotype and T-carriers for SNP rs1285933 in the C-type lectin superfamily member 5 (CLEC5A) gene was associated with severe dengue in a Northern Brazilian population (OR=2...
October 2017: Human Immunology
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
Abhilasha Madhvi, Smita Hingane, Rajpal Srivastav, Nishant Joshi, Chandru Subramani, Rajagopalan Muthumohan, Renu Khasa, Shweta Varshney, Manjula Kalia, Sudhanshu Vrati, Milan Surjit, C T Ranjith-Kumar
Hepatitis C virus (HCV) is a global pathogen and infects more than 185 million individuals worldwide. Although recent development of direct acting antivirals (DAA) has shown promise in HCV therapy, there is an urgent need for the development of more affordable treatment options. We initiated this study to identify novel inhibitors of HCV through screening of compounds from the National Cancer Institute (NCI) diversity dataset. Using cell-based assays, we identified NSC-320218 as a potent inhibitor against HCV with an EC50 of 2...
July 19, 2017: Scientific Reports
Anna Uehara, Hasitha Aravinda Tissera, Champica K Bodinayake, Ananda Amarasinghe, Ajith Nagahawatte, L Gayani Tillekeratne, Jie Cui, Megan E Reller, Paba Palihawadana, Sunethra Gunasena, Aruna Dharshan Desilva, Annelies Wilder-Smith, Duane J Gubler, Christopher W Woods, October M Sessions
The four serotypes of dengue virus (DENV-1, -2, -3, and -4) have had a rapidly expanding geographic range and are now endemic in over 100 tropical and subtropical countries. Sri Lanka has experienced periodic dengue outbreaks since the 1960s, but since 1989 epidemics have become progressively larger and associated with more severe disease. The dominant virus in the 2012 epidemic was DENV-1, but DENV-4 infections were also commonly observed. DENV-4 transmission was first documented in Sri Lanka when it was isolated from a traveler in 1978, but has been comparatively uncommon since dengue surveillance began in the early 1980s...
July 2017: American Journal of Tropical Medicine and Hygiene
Kim-Kee Tan, Nurul-Izzani Zulkifle, Juraina Abd-Jamil, Syuhaida Sulaiman, Che Norainon Yaacob, Noor Syahida Azizan, Nurul Asma Anati Che Mat Seri, Nur Izyan Samsudin, Nur Hidayana Mahfodz, Sazaly AbuBakar
Dengue is hyperendemic in most of Southeast Asia. In this region, all four dengue virus serotypes are persistently present. Major dengue outbreak cycle occurs in a cyclical pattern involving the different dengue virus serotypes. In Malaysia, since the 1980s, the major outbreak cycles have involved dengue virus type 3 (DENV3), dengue virus type 1 (DENV1) and dengue virus type 2 (DENV2), occurring in that order (DENV3/DENV1/DENV2). Only limited information on the DENV3 cycles, however, have been described. In the current study, we examined the major outbreak cycle involving DENV3 using data from 1985 to 2016...
July 8, 2017: Infection, Genetics and Evolution
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