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https://www.readbyqxmd.com/read/29244221/routes-of-transmission-of-influenza-a-h1n1-sars-cov-and-norovirus-in-air-cabin-comparative-analyses
#1
Hao Lei, Yuguo Li, Shenglan Xiao, Chao-Hsin Lin, Sharon L Norris, Daniel Wei, Zhongmin Hu, Shengcheng Ji
Identifying the exact transmission route(s) of infectious diseases in indoor environments is a crucial step in developing effective intervention strategies. In this study, we proposed a comparative analysis approach and built a model to simulate outbreaks of three different inflight infections in a similar cabin environment, i.e., influenza A H1N1, severe acute respiratory syndrome (SARS) coronavirus (CoV), and norovirus. The simulation results seemed to suggest that the close contact route was probably the most significant route (contributes 70%, 95% confidence interval (CI): 67%-72%) in the inflight transmission of influenza A H1N1 transmission; as a result, passengers within two rows of the index case had a significantly higher infection risk than others in the outbreak (relative risk (RR): 13...
December 15, 2017: Indoor Air
https://www.readbyqxmd.com/read/29244009/inference-of-genetic-relatedness-between-viral-quasispecies-from-sequencing-data
#2
Olga Glebova, Sergey Knyazev, Andrew Melnyk, Alexander Artyomenko, Yury Khudyakov, Alex Zelikovsky, Pavel Skums
BACKGROUND: RNA viruses such as HCV and HIV mutate at extremely high rates, and as a result, they exist in infected hosts as populations of genetically related variants. Recent advances in sequencing technologies make possible to identify such populations at great depth. In particular, these technologies provide new opportunities for inference of relatedness between viral samples, identification of transmission clusters and sources of infection, which are crucial tasks for viral outbreaks investigations...
December 6, 2017: BMC Genomics
https://www.readbyqxmd.com/read/29244005/ghost-global-hepatitis-outbreak-and-surveillance-technology
#3
Atkinson G Longmire, Seth Sims, Inna Rytsareva, David S Campo, Pavel Skums, Zoya Dimitrova, Sumathi Ramachandran, Magdalena Medrzycki, Hong Thai, Lilia Ganova-Raeva, Yulin Lin, Lili T Punkova, Amanda Sue, Massimo Mirabito, Silver Wang, Robin Tracy, Victor Bolet, Thom Sukalac, Chris Lynberg, Yury Khudyakov
BACKGROUND: Hepatitis C is a major public health problem in the United States and worldwide. Outbreaks of hepatitis C virus (HCV) infections associated with unsafe injection practices, drug diversion, and other exposures to blood are difficult to detect and investigate. Effective HCV outbreak investigation requires comprehensive surveillance and robust case investigation. We previously developed and validated a methodology for the rapid and cost-effective identification of HCV transmission clusters...
December 6, 2017: BMC Genomics
https://www.readbyqxmd.com/read/29244001/transmissibility-of-intra-host-hepatitis-c-virus-variants
#4
David S Campo, June Zhang, Sumathi Ramachandran, Yury Khudyakov
BACKGROUND: Intra-host hepatitis C virus (HCV) populations are genetically heterogeneous and organized in subpopulations. With the exception of blood transfusions, transmission of HCV occurs via a small number of genetic variants, the effect of which is frequently described as a bottleneck. Stochasticity of transmission associated with the bottleneck is usually used to explain genetic differences among HCV populations identified in the source and recipient cases, which may be further exacerbated by intra-host HCV evolution and differential biological capacity of HCV variants to successfully establish a population in a new host...
December 6, 2017: BMC Genomics
https://www.readbyqxmd.com/read/29244000/identification-of-recent-cases-of-hepatitis-c-virus-infection-using-physical-chemical-properties-of-hypervariable-region-1-and-a-radial-basis-function-neural-network-classifier
#5
James Lara, Mahder Teka, Yury Khudyakov
BACKGROUND: Identification of acute or recent hepatitis C virus (HCV) infections is important for detecting outbreaks and devising timely public health interventions for interruption of transmission. Epidemiological investigations and chemistry-based laboratory tests are 2 main approaches that are available for identification of acute HCV infection. However, owing to complexity, both approaches are not efficient. Here, we describe a new sequence alignment-free method to discriminate between recent (R) and chronic (C) HCV infection using next-generation sequencing (NGS) data derived from the HCV hypervariable region 1 (HVR1)...
December 6, 2017: BMC Genomics
https://www.readbyqxmd.com/read/29243225/review-current-priorities-in-the-zika-response
#6
REVIEW
Danillo Lucas Alves Esposito, Jonathan Ballico de Moraes, Benedito Antonio Lopes da Fonseca
Zika virus (ZIKV), a single-stranded RNA virus of the Flaviviridae family, is an arbovirus (viruses transmitted by arthropods) transmitted to humans and non-human primates through the bites of infected female Aedes sp. mosquitoes. Although first isolated in 1947, only recently it emerged as a global threat, present in several countries resulting in a pandemic scenario. ZIKV infections may result in severe outcomes, such as neurological impairment, and with the intrinsic ability of inducing microcephaly in fetuses of infected pregnant women, the virus has become a major public health problem...
December 15, 2017: Immunology
https://www.readbyqxmd.com/read/29243070/extensive-evolution-analysis-of-the-global-chikungunya-virus-strains-revealed-the-origination-of-chikv-epidemics-in-pakistan-in-2016
#7
Junming Shi, Zhengyuan Su, Zhaojun Fan, Jun Wang, Siqing Liu, Bo Zhang, Hongping Wei, Shoukat Jehan, Nadia Jamil, Shu Shen, Fei Deng
Chikungunya virus (CHIKV) is a mosquito-borne virus that causes epidemics widely in the world especially in the tropical and subtropical regions. Phylogenetic analysis has found that the CHIKV lineages were associated with the spatial and temporal distributions, which were related to the virus adaption to the major mosquito species and their distributions. In this study, we reported the complete genome sequences of eight CHIKV isolates from the outbreak in Pakistan last year. Then we reviewed the evolutionary history using extensive phylogenetic analysis, analyzed lineagespecific substitutions in viral proteins, and characterized the spreading pathway of CHIKV strains including the Pakistani strains...
December 11, 2017: Virologica Sinica
https://www.readbyqxmd.com/read/29243063/molecular-characterization-of-the-spike-gene-of-the-porcine-epidemic-diarrhea-virus-in-mexico-2013-2016
#8
Rocío Lara-Romero, Luis Gómez-Núñez, José Luis Cerriteño-Sánchez, Laura Márquez-Valdelamar, Susana Mendoza-Elvira, Humberto Ramírez-Mendoza, José Francisco Rivera-Benítez
In Mexico, the first outbreaks suggestive of the circulation of the porcine epidemic diarrhea virus (PEDV) were identified at the beginning of July 2013. To identify the molecular characteristics of the PEDV Spike (S) gene in Mexico, 116 samples of the intestine and diarrhea of piglets with clinical signs of porcine epidemic diarrhea (PED) were obtained. Samples were collected from 14 farms located in six states of Mexico (Jalisco, Puebla, Sonora, Veracruz, Guanajuato, and Michoacán) from 2013 to 2016. To identify PEDV, we used real-time RT-PCR to discriminate between non-INDEL and INDEL strains...
December 14, 2017: Virus Genes
https://www.readbyqxmd.com/read/29242829/molecular-mechanisms-for-microbe-recognition-and-defense-by-the-red-seaweed-laurencia-dendroidea
#9
Louisi Souza de Oliveira, Diogo Antonio Tschoeke, Ana Carolina Rubem Magalhães Lopes, Daniela Bueno Sudatti, Pedro Milet Meirelles, Cristiane C Thompson, Renato Crespo Pereira, Fabiano L Thompson
The ability to recognize and respond to the presence of microbes is an essential strategy for seaweeds to survive in the marine environment, but understanding of molecular seaweed-microbe interactions is limited. Laurencia dendroidea clones were inoculated with the marine bacterium Vibrio madracius. The seaweed RNA was sequenced, providing an unprecedentedly high coverage of the transcriptome of Laurencia, and the gene expression levels were compared between control and inoculated samples after 24, 48, and 72 h...
November 2017: MSphere
https://www.readbyqxmd.com/read/29242618/a-simple-platform-for-the-rapid-development-of-antimicrobials
#10
Stephen Albert Johnston, Valeriy Domenyuk, Nidhi Gupta, Milene Tavares Batista, John C Lainson, Zhan-Gong Zhao, Joel F Lusk, Andrey Loskutov, Zbigniew Cichacz, Phillip Stafford, Joseph Barten Legutki, Chris W Diehnelt
Recent infectious outbreaks highlight the need for platform technologies that can be quickly deployed to develop therapeutics needed to contain the outbreak. We present a simple concept for rapid development of new antimicrobials. The goal was to produce in as little as one week thousands of doses of an intervention for a new pathogen. We tested the feasibility of a system based on antimicrobial synbodies. The system involves creating an array of 100 peptides that have been selected for broad capability to bind and/or kill viruses and bacteria...
December 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29242521/surveillance-of-live-poultry-markets-for-low-pathogenic-avian-influenza-viruses-in-guangxi-province-southern-china-from-2012-2015
#11
Sisi Luo, Zhixun Xie, Zhiqin Xie, Liji Xie, Li Huang, Jiaoling Huang, Xianwen Deng, Tingting Zeng, Sheng Wang, Yanfang Zhang, Jiabo Liu
Infections with low pathogenic avian influenza viruses (LPAIVs) can be mild or asymptomatic in poultry; however, in humans, LPAIVs can cause severe infections and death, as demonstrated by the H7N9 and H10N8 human infection outbreaks in 2013 in China. In this study, we conducted an epidemiological survey of LPAIVs at live poultry markets (LPMs) in Guangxi Province, Southern China, which is near several Southeast Asian countries. From January 2012 to December 2015, we collected 3,813 swab samples from poultry at LPMs in Guangxi...
December 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29241768/zika-virus-the-transboundary-pathogen-from-mosquito-and-updates
#12
REVIEW
Weili Kong, Jian Zhu
Zika virus (ZIKV) is a mosquito-borne flavivirus that was relatively obscure until outbreaks started in 2013. ZIKV is associated with neurological manifestations such as Guillan-Barrè Syndrome in adult and microcephaly in the newborn population. Although the majority of disease mechanisms of ZIKV is unclear, some information was updated with new scientific evidence. Currently, there are no approved drugs or vaccine that can be used for therapy during ZIKV infection. Based on the transmission mechanism of ZIKV, vector control and safe sex seem to be the most effective available preventive measures against ZIKV spread...
December 11, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29241658/spatiotemporal-bayesian-networks-for-malaria-prediction
#13
Peter Haddawy, A H M Imrul Hasan, Rangwan Kasantikul, Saranath Lawpoolsri, Patiwat Sa-Angchai, Jaranit Kaewkungwal, Pratap Singhasivanon
Targeted intervention and resource allocation are essential for effective malaria control, particularly in remote areas, with predictive models providing important information for decision making. While a diversity of modeling technique have been used to create predictive models of malaria, no work has made use of Bayesian networks. Bayes nets are attractive due to their ability to represent uncertainty, model time lagged and nonlinear relations, and provide explanations. This paper explores the use of Bayesian networks to model malaria, demonstrating the approach by creating village level models with weekly temporal resolution for Tha Song Yang district in northern Thailand...
December 11, 2017: Artificial Intelligence in Medicine
https://www.readbyqxmd.com/read/29241475/israeli-national-policy-for-carbapenem-resistant-enterobacteriaceae-screening-carrier-isolation-and-discontinuation-of-isolation
#14
Ester Solter, Amos Adler, Bina Rubinovitch, Elizabeth Temkin, David Schwartz, Debby Ben-David, Samira Masarwa, Yehuda Carmeli, Mitchell J Schwaber
Since 2006, Israel has been confronting an outbreak of carbapenem-resistant Enterobacteriaceae (CRE), and in 2007 Israel implemented a national strategy to contain spread. The intervention was initially directed toward acute-care hospitals and later expanded to include an established reservoir of carriage in long-term-care hospitals. It included regular reporting of CRE cases to a central registry and daily oversight of management of the outbreak at the institutional level. Microbiological methodologies were standardized in clinical laboratories nationwide...
December 15, 2017: Infection Control and Hospital Epidemiology
https://www.readbyqxmd.com/read/29241399/identifying-the-source-of-food-borne-disease-outbreaks-an-application-of-bayesian-variable-selection
#15
Rianne Jacobs, Emmanuel Lesaffre, Peter Fm Teunis, Michael Höhle, Jan van de Kassteele
Early identification of contaminated food products is crucial in reducing health burdens of food-borne disease outbreaks. Analytic case-control studies are primarily used in this identification stage by comparing exposures in cases and controls using logistic regression. Standard epidemiological analysis practice is not formally defined and the combination of currently applied methods is subject to issues such as response misclassification, missing values, multiple testing problems and small sample estimation problems resulting in biased and possibly misleading results...
January 1, 2017: Statistical Methods in Medical Research
https://www.readbyqxmd.com/read/29240985/serological-responses-to-revaccination-with-hav-vaccines-among-hiv-positive-individuals-whose-anti-hav-antibody-waned-after-primary-vaccination
#16
Guan-Jhou Chen, Hsin-Yun Sun, Kuan-Yin Lin, Aristine Cheng, Yi-Chia Huang, Szu-Min Hsieh, Wang-Huei Sheng, Wen-Chun Liu, Chien-Ching Hung, Shan-Chwen Chang
BACKGROUND: Among HIV-positive individuals, seroprotection for hepatitis A virus (HAV) following primary vaccination may wane with time. However, seroresponses to HAV revaccination are rarely investigated among HIV-positive patients who have lost protective antibodies after primary vaccination. METHODS: During the outbreak of acute hepatitis A in Taiwan after June 2015, HAV-seronegative, HIV-positive individuals were advised to receive 2 doses of HAV vaccines at 24 weeks apart...
December 14, 2017: Liver International: Official Journal of the International Association for the Study of the Liver
https://www.readbyqxmd.com/read/29240811/whole-genome-analyses-of-human-adenovirus-type-55-emerged-in-tibet-sichuan-and-yunnan-in-china-in-2016
#17
Wenbo Wang, Yuan Liu, Yifan Zhou, Liangqi Gu, Lin Zhang, Xuelian Zhang, Maomao Chen, Ziying Zou, Wei Qiu, Xiaobing Hu, Quanshui Fan
Three outbreaks of acute respiratory disease occurred at military camps in 2016 at Tibet, Sichuan and Yunnan province, China. The pathogen induced these three outbreaks were all confirmed as HAdV-55 by genotype-specific PCR. The outbreak in Tibet was the first report that HAdV-55 occurred in the high altitude (HA, above sea level 3658 m). This study aims to determine the gene variation and evolution characteristics of these viral strains. Three strains of adenoviruses, LS89/Tibet/2016 (GenBank accession no...
2017: PloS One
https://www.readbyqxmd.com/read/29240727/health-and-development-at-age-19-24-months-of-19-children-who-were-born-with-microcephaly-and-laboratory-evidence-of-congenital-zika-virus-infection-during-the-2015-zika-virus-outbreak-brazil-2017
#18
Ashley Satterfield-Nash, Kim Kotzky, Jacob Allen, Jeanne Bertolli, Cynthia A Moore, Isabela Ornelas Pereira, André Pessoa, Flavio Melo, Ana Carolina Faria E Silva Santelli, Coleen A Boyle, Georgina Peacock
In November 2015, the Brazilian Ministry of Health (MOH) declared the Zika virus outbreak a public health emergency after an increase in microcephaly cases was reported in the northeast region of the country (1). During 2015-2016, 15 states in Brazil with laboratory-confirmed Zika virus transmission reported an increase in birth prevalence of microcephaly (2.8 cases per 10,000 live births), significantly exceeding prevalence in four states without confirmed transmission (0.6 per 10,000) (2). Although children with microcephaly and laboratory evidence of Zika virus infection have been described in early infancy (3), their subsequent health and development have not been well characterized, constraining planning for the care and support of these children and their families...
December 15, 2017: MMWR. Morbidity and Mortality Weekly Report
https://www.readbyqxmd.com/read/29240724/large-outbreak-of-neisseria-meningitidis-serogroup-c-nigeria-december-2016-june-2017
#19
Chimeremma Nnadi, John Oladejo, Sebastian Yennan, Adesola Ogunleye, Chidinma Agbai, Lawal Bakare, Mohammed Abdulaziz, Amina Mohammed, Mary Stephens, Kyadindi Sumaili, Olivier Ronveaux, Helen Maguire, Debra Karch, Mahmood Dalhat, Martin Antonio, Andre Bita, Ifeanyi Okudo, Patrick Nguku, Ryan Novak, Omotayo Bolu, Faisal Shuaib, Chikwe Ihekweazu
On February 16, 2017, the Ministry of Health in Zamfara State, in northwestern Nigeria, notified the Nigeria Centre for Disease Control (NCDC) of an increased number of suspected cerebrospinal meningitis (meningitis) cases reported from four local government areas (LGAs). Meningitis cases were subsequently also reported from Katsina, Kebbi, Niger, and Sokoto states, all of which share borders with Zamfara State, and from Yobe State in northeastern Nigeria. On April 3, 2017, NCDC activated an Emergency Operations Center (EOC) to coordinate rapid development and implementation of a national meningitis emergency outbreak response plan...
December 15, 2017: MMWR. Morbidity and Mortality Weekly Report
https://www.readbyqxmd.com/read/29240665/airborne-or-fomite-transmission-for-norovirus-a-case-study-revisited
#20
Shenglan Xiao, Julian W Tang, Yuguo Li
Norovirus infection, a highly prevalent condition associated with a high rate of morbidity, comprises a significant health issue. Although norovirus transmission mainly occurs via the fecal-oral and vomit-oral routes, airborne transmission has been proposed in recent decades. This paper re-examines a previously described norovirus outbreak in a hotel restaurant wherein airborne transmission was originally inferred. Specifically, the original evidence that suggested airborne transmission was re-analyzed by exploring an alternative hypothesis: could this outbreak instead have occurred via fomite transmission? This re-analysis was based on whether fomite transmission could have yielded similar attack rate distribution patterns...
December 14, 2017: International Journal of Environmental Research and Public Health
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