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https://www.readbyqxmd.com/read/28098528/spread-and-evolution-of-respiratory-syncytial-virus-a-genotype-on1-coastal-kenya-2010-2015
#1
James R Otieno, Everlyn M Kamau, Charles N Agoti, Clement Lewa, Grieven Otieno, Ann Bett, Mwanajuma Ngama, Patricia A Cane, D James Nokes
In February 2012, the novel respiratory syncytial virus (RSV) group A, genotype ON1, was detected in Kilifi County, coastal Kenya. ON1 is characterized by a 72-nt duplication within the highly variable G gene (encoding the immunogenic attachment surface protein). Cases were diagnosed through surveillance of pneumonia in children at the county hospital. Analysis of epidemiologic, clinical, and sequence data of RSV-A viruses detected over 5 RSV seasons (2010/2011 to 2014/2015) indicated the following: 1) replacement of previously circulating genotype GA2 ON1, 2) an abrupt expansion in the number of ON1 variants detected in the 2014/2015 epidemic, 3) recently accumulation of amino acid substitutions within the ON1 duplicated sequence, and 4) no clear evidence of altered pathogenicity relative to GA2...
February 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28098392/bayesian-nonparametric-clustering-in-phylogenetics-modeling-antigenic-evolution-in-influenza
#2
Gabriela B Cybis, Janet S Sinsheimer, Trevor Bedford, Andrew Rambaut, Philippe Lemey, Marc A Suchard
Influenza is responsible for up to 500,000 deaths every year, and antigenic variability represents much of its epidemiological burden. To visualize antigenic differences across many viral strains, antigenic cartography methods use multidimensional scaling on binding assay data to map influenza antigenicity onto a low-dimensional space. Analysis of such assay data ideally leads to natural clustering of influenza strains of similar antigenicity that correlate with sequence evolution. To understand the dynamics of these antigenic groups, we present a framework that jointly models genetic and antigenic evolution by combining multidimensional scaling of binding assay data, Bayesian phylogenetic machinery and nonparametric clustering methods...
January 18, 2017: Statistics in Medicine
https://www.readbyqxmd.com/read/28097881/evaluation-of-hemoglobin-a1c-measurement-from-filter-paper-using-high-performance-liquid-chromatography-and-immunoturbidimetric-assay
#3
Yonghua Wu, Xu Yang, Haining Wang, Zhenrong Li, Tiancheng Wang
Glycated hemoglobin (HbA1c) measurement from whole blood (WB) samples is inconvenient for epidemic surveillance and self-monitoring of glycemic level. We evaluated HbA1c measurement from WB blotted on filter paper (FP), which can be easily transported to central laboratories, with high-performance liquid chromatography (HPLC) and immunoturbidimetric assay (ITA). WB was applied to Whatman filter paper. By using HPLC and WB samples as reference methods, these FP samples were evaluated on HPLC and ITA. Inter- and intra-assay variation, WB vs...
January 18, 2017: Scandinavian Journal of Clinical and Laboratory Investigation
https://www.readbyqxmd.com/read/28097604/theory-based-explanation-as-intervention
#4
Kara Weisman, Ellen M Markman
Cogent explanations are an indispensable means of providing new information and an essential component of effective education. Beyond this, we argue that there is tremendous untapped potential in using explanations to motivate behavior change. In this article we focus on health interventions. We review four case studies that used carefully tailored explanations to address gaps and misconceptions in people's intuitive theories, providing participants with a conceptual framework for understanding how and why some recommended behavior is an effective way of achieving a health goal...
January 17, 2017: Psychonomic Bulletin & Review
https://www.readbyqxmd.com/read/28097532/medication-overuse-in-chronic-pain
#5
REVIEW
Eric S Hsu
PURPOSE OF REVIEW: Chronic pain is usually managed by various pharmacotherapies after exhausting the conservative modalities such as over-the-counter choices. The goal of this review is to investigate current state of opioids and non-opioid medication overuse that includes NSAIDs, skeletal muscle relaxants, antidepressants, membrane stabilization agents, and benzodiazepine. How to minimize medication overuse and achieve better outcome in chronic pain management? RECENT FINDINGS: Although antidepressants and membrane stabilization agents contribute to the crucial components for neuromodulation, opioids were frequently designated as a rescue remedy in chronic pain since adjunct analgesics usually do not provide instantaneous relief...
January 2017: Current Pain and Headache Reports
https://www.readbyqxmd.com/read/28097418/heterogeneous-network-epidemics-real-time-growth-variance-and-extinction-of-infection
#6
Frank Ball, Thomas House
Recent years have seen a large amount of interest in epidemics on networks as a way of representing the complex structure of contacts capable of spreading infections through the modern human population. The configuration model is a popular choice in theoretical studies since it combines the ability to specify the distribution of the number of contacts (degree) with analytical tractability. Here we consider the early real-time behaviour of the Markovian SIR epidemic model on a configuration model network using a multitype branching process...
January 17, 2017: Journal of Mathematical Biology
https://www.readbyqxmd.com/read/28097338/coping-with-uncertainty-roz-ray-and-the-aids-epidemic
#7
Jody W Zylke
No abstract text is available yet for this article.
January 10, 2017: JAMA: the Journal of the American Medical Association
https://www.readbyqxmd.com/read/28097052/population-dynamics-of-epidemic-and-endemic-states-of-drug-resistance-emergence-in-infectious-diseases
#8
Diána Knipl, Gergely Röst, Seyed M Moghadas
The emergence and spread of drug-resistance during treatment of many infectious diseases continue to degrade our ability to control and mitigate infection outcomes using therapeutic measures. While the coverage and efficacy of treatment remain key factors in the population dynamics of resistance, the timing for the start of the treatment in infectious individuals can significantly influence such dynamics. We developed a between-host disease transmission model to investigate the short-term (epidemic) and long-term (endemic) states of infections caused by two competing pathogen subtypes, namely the wild-type and resistant-type, when the probability of developing resistance is a function of delay in start of the treatment...
2017: PeerJ
https://www.readbyqxmd.com/read/28096698/burkitt-lymphoma-in-adolescents-and-young-adults-management-challenges
#9
REVIEW
Massimo Dozzo, Francesca Carobolante, Pietro Maria Donisi, Annamaria Scattolin, Elena Maino, Rosaria Sancetta, Piera Viero, Renato Bassan
About one-half of all Burkitt lymphoma (BL) patients are younger than 40 years, and one-third belong to the adolescent and young adult (AYA) subset, defined by an age between 15 and 25-40 years, based on selection criteria used in different reports. BL is an aggressive B-cell neoplasm displaying highly characteristic clinico-diagnostic features, the biologic hallmark of which is a translocation involving immunoglobulin and c-MYC genes. It presents as sporadic, endemic, or epidemic disease. Endemicity is pathogenetically linked to an imbalance of the immune system which occurs in African children infected by malaria parasites and Epstein-Barr virus, while the epidemic form strictly follows the pattern of infection by HIV...
2017: Adolescent Health, Medicine and Therapeutics
https://www.readbyqxmd.com/read/28096531/the-first-imported-case-of-rift-valley-fever-in-china-reveals-a-genetic-reassortment-of-different-viral-lineages
#10
Jingyuan Liu, Yulan Sun, Weifeng Shi, Shuguang Tan, Yang Pan, Shujuan Cui, Qingchao Zhang, Xiangfeng Dou, Yanning Lv, Xinyu Li, Xitai Li, Lijuan Chen, Chuansong Quan, Qianli Wang, Yingze Zhao, Qiang Lv, Wenhao Hua, Hui Zeng, Zhihai Chen, Haofeng Xiong, Chengyu Jiang, Xinghuo Pang, Fujie Zhang, Mifang Liang, Guizhen Wu, George F Gao, William J Liu, Ang Li, Quanyi Wang
We report the first imported case of Rift Valley fever (RVF) in China. The patient returned from Angola, a non-epidemic country, with an infection of a new reassortant from different lineages of Rift Valley fever viruses (RVFVs). The patient developed multiorgan dysfunction and gradually recovered with continuous renal replacement therapy and a short regimen of methylprednisolone treatment. The disordered cytokines and chemokines in the plasma of the patient revealed hypercytokinemia, but the levels of protective cytokines were low upon admission and fluctuated as the disease improved...
January 18, 2017: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/28096484/evolutionary-dynamics-of-pandemic-methicillin-sensitive-staphylococcus-aureus-st398-and-its-international-spread-via-routes-of-human-migration
#11
Anne-Catrin Uhlemann, Paul R McAdam, Sean B Sullivan, Justin R Knox, Hossein Khiabanian, Raul Rabadan, Peter R Davies, J Ross Fitzgerald, Franklin D Lowy
: Methicillin-susceptible Staphylococcus aureus (MSSA) accounts for the majority of S. aureus infections globally, and yet surprisingly little is known about its clonal evolution. We applied comparative whole-genome sequencing (WGS) analyses to epidemiologically and geographically diverse ST398-MSSA, a pandemic lineage affecting both humans and livestock. Bayesian phylogenetic analysis predicted divergence of human-associated ST398-MSSA ~40 years ago. Isolates from Midwestern pigs and veterinarians differed substantially from those in New York City (NYC)...
January 17, 2017: MBio
https://www.readbyqxmd.com/read/28096420/drivers-of-rift-valley-fever-epidemics-in-madagascar
#12
Renaud Lancelot, Marina Béral, Vincent Michel Rakotoharinome, Soa-Fy Andriamandimby, Jean-Michel Héraud, Caroline Coste, Andrea Apolloni, Cécile Squarzoni-Diaw, Stéphane de La Rocque, Pierre B H Formenty, Jérémy Bouyer, G R William Wint, Eric Cardinale
Rift Valley fever (RVF) is a vector-borne viral disease widespread in Africa. The primary cycle involves mosquitoes and wild and domestic ruminant hosts. Humans are usually contaminated after contact with infected ruminants. As many environmental, agricultural, epidemiological, and anthropogenic factors are implicated in RVF spread, the multidisciplinary One Health approach was needed to identify the drivers of RVF epidemics in Madagascar. We examined the environmental patterns associated with these epidemics, comparing human and ruminant serological data with environmental and cattle-trade data...
January 17, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28095904/evaluation-of-the-tsima-community-mobilization-intervention-to-improve-engagement-in-hiv-testing-and-care-in-south-africa-study-protocol-for-a-cluster-randomized-trial
#13
Sheri A Lippman, Audrey Pettifor, Dumisani Rebombo, Aimée Julien, Ryan G Wagner, Mi-Suk Kang Dufour, Chodziwadziwa Whiteson Kabudula, Torsten B Neilands, Rhian Twine, Ann Gottert, F Xavier Gómez-Olivé, Stephen M Tollman, Ian Sanne, Dean Peacock, Kathleen Kahn
BACKGROUND: HIV transmission can be decreased substantially by reducing the burden of undiagnosed HIV infection and expanding early and consistent use of antiretroviral therapy (ART). Treatment as prevention (TasP) has been proposed as key to ending the HIV epidemic. To activate TasP in high prevalence countries, like South Africa, communities must be motivated to know their status, engage in care, and remain in care. Community mobilization (CM) has the potential to significantly increase uptake testing, linkage to and retention in care by addressing the primary social barriers to engagement with HIV care-including poor understanding of HIV care; fear and stigma associated with infection, clinic attendance and disclosure; lack of social support; and gender norms that deter men from accessing care...
January 17, 2017: Implementation Science: IS
https://www.readbyqxmd.com/read/28095886/the-dynamics-of-hiv-transmission-in-out-of-school-young-heterosexual-men-in-south-africa-a-systematic-scoping-review-protocol
#14
Nonzwakazi Ntombela, Tivani P Mashamba-Thompson, Andile Mtshali, Anna Voce, Ayesha B M Kharsany
BACKGROUND: In South Africa, gender inequality dominated by males and heterosexual HIV epidemic are associated with high HIV infection. Underlying epidemiological and social determinants driving HIV acquisition and transmission are critical to understand the extent and complexity of sexual networks as primary mechanisms through which HIV is likely to spread. The aim of the study is to provide an overview of empiric evidence that links the complex interaction of risk of HIV infection in men...
January 17, 2017: Systematic Reviews
https://www.readbyqxmd.com/read/28095879/treatment-seeking-behaviour-and-barriers-to-service-access-for-sexually-transmitted-diseases-among-men-who-have-sex-with-men-in-china-a-multicentre-cross-sectional-survey
#15
Jun-Jie Xu, Yan-Qiu Yu, Qing-Hai Hu, Hong-Jing Yan, Zhe Wang, Lin Lu, Ming-Hua Zhuang, Xi Chen, Ji-Hua Fu, Wei-Ming Tang, Wen-Qing Geng, Yong-Jun Jiang, Hong Shang
BACKGROUND: Delayed or inappropriate treatment for sexually transmitted diseases (STDs) increases the risk of HIV acquisition and may cause other harmful outcomes. However, studies on STD treatment-seeking behaviour and correlated factors in men who have sex with men (MSM) are scarce. This information is crucial for the promotion of STD treatment-seeking behaviour and reduction of HIV transmission among Chinese MSM. METHODS: During 2012-2013, a multicentre cross-sectional study was conducted in 7 Chinese cities...
January 18, 2017: Infectious Diseases of Poverty
https://www.readbyqxmd.com/read/28095712/current-views-on-the-potential-for-development-of-a-hiv-vaccine
#16
Kristen W Cohen, Nicole Frahm
Despite many recent advances in the HIV prevention landscape, an effective vaccine remains the most promising tool to end the HIV-1 pandemic. Areas covered: This review summarizes past HIV vaccine efficacy trials and current vaccine strategies as well as new approaches about to move into first-in-human trials. Expert opinion: Despite many setbacks in early HIV vaccine efficacy trials, the success of RV144 has provided the glimmer of hope necessary to invigorate the vaccine field, and has led to the development of a large number of vaccine strategies aiming at inducing an array of different immune responses...
January 18, 2017: Expert Opinion on Biological Therapy
https://www.readbyqxmd.com/read/28095476/a-systematic-review-of-ebola-treatment-trials-to-assess-the-extent-to-which-they-adhere-to-ethical-guidelines
#17
Thomas Richardson, Andrew McDonald Johnston, Heather Draper
BACKGROUND: Objective: To determine to what extent each trial met criteria specified in three research frameworks for ethical trial conduct. Design: Systematic review and narrative analysis. METHODS AND FINDINGS: Data sources: MEDBASE and EMBASE databases were searched using a specific search strategy. The Cochrane database for systematic reviews, the PROSPERO database and trial registries were examined. A grey literature search and citation search were also carried out...
2017: PloS One
https://www.readbyqxmd.com/read/28095471/prevalence-and-risk-factors-of-prehypertension-and-hypertension-in-southern-china
#18
Lihua Hu, Xiao Huang, Chunjiao You, Juxiang Li, Kui Hong, Ping Li, Yanqing Wu, Qinhua Wu, Huihui Bao, Xiaoshu Cheng
BACKGROUND: This study aimed to describe the prevalence and risk factors of prehypertension and hypertension in Jiangxi Province, China. Individuals with prehypertension frequently progress into hypertension and are at high risk of developing cardiovascular disease and stroke. METHODS: A cross-sectional survey of 15,296 participants (15 years or older) was conducted in Jiangxi Province, China, in 2013, using questionnaire forms and physical measurements. RESULTS: The prevalence of prehypertension and hypertension was 32...
2017: PloS One
https://www.readbyqxmd.com/read/28095455/novel-porcine-epidemic-diarrhea-virus-pedv-variants-with-large-deletions-in-the-spike-s-gene-coexist-with-pedv-strains-possessing-an-intact-s-gene-in-domestic-pigs-in-japan-a-new-disease-situation
#19
Nguyen Van Diep, Junzo Norimine, Masuo Sueyoshi, Nguyen Thi Lan, Ryoji Yamaguchi
Since late 2013, after an absence of seven years, outbreaks of porcine epidemic diarrhea virus (PEDV) infection have reemerged and swept rapidly across Japan, resulting in significant economic losses. In this study, we report the emergence, mixed infection, and genetic characterization of 15 novel field PEDV variants with large genomic deletions. The sizes of deletion varied between 582 nt (194 aa) and 648 nt (216 aa) at positions 28-714 (10-238) on the S gene (protein). Among 17 PEDV samples isolated from individual pigs, all of them contained at least two distinct genotypes with large genomic deletions, and 94...
2017: PloS One
https://www.readbyqxmd.com/read/28095443/morphologic-and-molecular-characterization-of-a-strain-of-zika-virus-imported-into-guangdong-china
#20
Shufen Li, Yongxia Shi, Kui Zheng, Jun Dai, Xiaobo Li, Shuai Yuan, Ling Chen, Jicheng Huang
The recent outbreaks of Zika virus (ZIKV) disease have caused worldwide concerns. Guangdong province is one of the commercial centers in China and communicates frequently with the epidemic areas. To date, 65.2% of the ZIKV infection cases in China were imported via port of entry in Guangdong. The continuous surveillance of imported cases is crucial for the prevention and control of potential ZIKV infection outbreak in China. In this study, a strain of ZIKV was isolated from the serum of a 6-year-old child returning from Venezuela...
2017: PloS One
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