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https://www.readbyqxmd.com/read/28633988/a-cross-clade-h5n1-influenza-a-virus-neutralizing-monoclonal-antibody-binds-to-a-novel-epitope-within-the-vestigial-esterase-domain-of-hemagglutinin
#1
Subha Sankar Paul, Chee-Keng Mok, Tze-Minn Mak, Oi-Wing Ng, James Odame Aboagye, Teddy John Wohlbold, Florian Krammer, Yee-Joo Tan
The sporadic outbreaks of highly pathogenic H5N1 avian influenza virus have raised public health concerns. Monoclonal antibodies (MAbs) against hemagglutinin (HA) have been increasingly used successfully for therapeutic purposes. Previously, MAb 9F4, generated against clade 1 H5N1 HA, was observed to have cross-clade neutralizing efficacy and inhibited viral entry by preventing the pH-mediated conformational change of HA. Furthermore, mouse-human chimeric MAb 9F4 was found to retain high degrees of neutralizing activity...
June 17, 2017: Antiviral Research
https://www.readbyqxmd.com/read/28626613/modelling-environmental-drivers-of-black-band-disease-outbreaks-in-populations-of-foliose-corals-in-the-genus-montipora
#2
Carla C M Chen, David G Bourne, Christopher C Drovandi, Kerrie Mengersen, Bette L Willis, M Julian Caley, Yui Sato
Seawater temperature anomalies associated with warming climate have been linked to increases in coral disease outbreaks that have contributed to coral reef declines globally. However, little is known about how seasonal scale variations in environmental factors influence disease dynamics at the level of individual coral colonies. In this study, we applied a multi-state Markov model (MSM) to investigate the dynamics of black band disease (BBD) developing from apparently healthy corals and/or a precursor-stage, termed 'cyanobacterial patches' (CP), in relation to seasonal variation in light and seawater temperature at two reef sites around Pelorus Island in the central sector of the Great Barrier Reef...
2017: PeerJ
https://www.readbyqxmd.com/read/28622934/selection-to-outsmart-the-germs-the-evolution-of-disease-recognition-and-social-cognition
#3
Sharon E Kessler, Tyler R Bonnell, Richard W Byrne, Colin A Chapman
The emergence of providing care to diseased conspecifics must have been a turning point during the evolution of hominin sociality. On a population level, care may have minimized the costs of socially transmitted diseases at a time of increasing social complexity, although individual care-givers probably incurred increased transmission risks. We propose that care-giving likely originated within kin networks, where the costs may have been balanced by fitness increases obtained through caring for ill kin. We test a novel hypothesis of hominin cognitive evolution in which disease may have selected for the cognitive ability to recognize when a conspecific is infected...
July 2017: Journal of Human Evolution
https://www.readbyqxmd.com/read/28622862/identification-of-lawsonia-intracellularis-putative-hemolysin-protein-a-and-characterization-of-its-immunoreactivity
#4
Jehyung Kim, Gayeon Won, Suyeon Park, John Hwa Lee
Despite the recent global increase in fatal endemic outbreaks of proliferative enteropathy (PE) caused by the obligate intracellular bacterium Lawsonia intracelluralis (LI) in the swine industry, development of effective prevention strategies or immunodiagnostic tests has been delayed due to the difficulty of cultivating this pathogen in vitro. Although several genetic analyses have been performed at the level of gene transcription after the complete genome sequence of LI was made available, the mechanism of LI infection and virulence genes remain unidentified...
June 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28619165/the-use-of-animals-as-a-surveillance-tool-for-monitoring-environmental-health-hazards-human-health-hazards-and-bioterrorism
#5
REVIEW
Jacqueline Pei Shan Neo, Boon Huan Tan
This review discusses the utilization of wild or domestic animals as surveillance tools for monitoring naturally occurring environmental and human health hazards. Besides providing early warning to natural hazards, animals can also provide early warning to societal hazards like bioterrorism. Animals are ideal surveillance tools to humans because they share the same environment as humans and spend more time outdoors than humans, increasing their exposure risk. Furthermore, the biologically compressed lifespans of some animals may allow them to develop clinical signs more rapidly after exposure to specific pathogens...
May 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28618588/multiscale-model-for-pedestrian-and-infection-dynamics-during-air-travel
#6
Sirish Namilae, Pierrot Derjany, Anuj Mubayi, Mathew Scotch, Ashok Srinivasan
In this paper we develop a multiscale model combining social-force-based pedestrian movement with a population level stochastic infection transmission dynamics framework. The model is then applied to study the infection transmission within airplanes and the transmission of the Ebola virus through casual contacts. Drastic limitations on air-travel during epidemics, such as during the 2014 Ebola outbreak in West Africa, carry considerable economic and human costs. We use the computational model to evaluate the effects of passenger movement within airplanes and air-travel policies on the geospatial spread of infectious diseases...
May 2017: Physical Review. E
https://www.readbyqxmd.com/read/28616479/human-q-fever-incidence-is-associated-to-spatiotemporal-environmental-conditions
#7
J P G Van Leuken, A N Swart, J Brandsma, W Terink, J Van de Kassteele, P Droogers, F Sauter, A H Havelaar, W Van der Hoek
Airborne pathogenic transmission from sources to humans is characterised by atmospheric dispersion and influence of environmental conditions on deposition and reaerosolisation. We applied a One Health approach using human, veterinary and environmental data regarding the 2009 epidemic in The Netherlands, and investigated whether observed human Q fever incidence rates were correlated to environmental risk factors. We identified 158 putative sources (dairy goat and sheep farms) and included 2339 human cases. We performed a high-resolution (1 × 1 km) zero-inflated regression analysis to predict incidence rates by Coxiella burnetii concentration (using an atmospheric dispersion model and meteorological data), and environmental factors - including vegetation density, soil moisture, soil erosion sensitivity, and land use data - at a yearly and monthly time-resolution...
December 2016: One Health
https://www.readbyqxmd.com/read/28611398/derivation-and-validation-of-a-mortality-risk-score-for-severe-hand-foot-and-mouth-disease-in-china
#8
Jun Qiu, Xiulan Lu, Xiao Liu, Ping Zang, Wenjiao Zhao, Pingping Liu, Zhenghui Xiao
Outbreaks of hand, foot and mouth disease (HFMD) have increased recently, as has the case fatality rate in severe cases. No scoring system currently exists to predict mortality risk for severe HFMD in previous study. We retrospectively collected laboratory parameters for 546 patients with severe HFMD (a derivation and a validation cohort) at Hunan Children's Hospitals between January 2012 and December 2014. We developed a mortality risk score comprising four laboratory parameters: blood glucose (GLU), white blood cells (WBC), lactate (LAC), and N-terminal-probrain natriuretic peptide (NT-proBNP)...
June 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28611015/too-far-to-care-measuring-public-attention-and-fear-for-ebola-using-twitter
#9
Liza Gg van Lent, Hande Sungur, Florian A Kunneman, Bob van de Velde, Enny Das
BACKGROUND: In 2014, the world was startled by a sudden outbreak of Ebola. Although Ebola infections and deaths occurred almost exclusively in Guinea, Sierra Leone, and Liberia, few potential Western cases, in particular, caused a great stir among the public in Western countries. OBJECTIVE: This study builds on the construal level theory to examine the relationship between psychological distance to an epidemic and public attention and sentiment expressed on Twitter...
June 13, 2017: Journal of Medical Internet Research
https://www.readbyqxmd.com/read/28606143/effectiveness-of-reactive-case-detection-for-malaria-elimination-in-three-archetypical-transmission-settings-a-modelling-study
#10
Jaline Gerardin, Caitlin A Bever, Daniel Bridenbecker, Busiku Hamainza, Kafula Silumbe, John M Miller, Thomas P Eisele, Philip A Eckhoff, Edward A Wenger
BACKGROUND: Reactive case detection could be a powerful tool in malaria elimination, as it selectively targets transmission pockets. However, field operations have yet to demonstrate under which conditions, if any, reactive case detection is best poised to push a region to elimination. This study uses mathematical modelling to assess how baseline transmission intensity and local interconnectedness affect the impact of reactive activities in the context of other possible intervention packages...
June 12, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28604813/modeling-the-ebola-zoonotic-dynamics-interplay-between-enviroclimatic-factors-and-bat-ecology
#11
Javier Buceta, Kaylynn Johnson
Understanding Ebola necessarily requires the characterization of the ecology of its main enzootic reservoir, i.e. bats, and its interplay with seasonal and enviroclimatic factors. Here we present a SIR compartmental model where we implement a bidirectional coupling between the available resources and the dynamics of the bat population in order to understand their migration patterns. Our compartmental modeling approach and simulations include transport terms to account for bats mobility and spatiotemporal climate variability...
2017: PloS One
https://www.readbyqxmd.com/read/28599215/mathematical-modeling-of-diphtheria-transmission-in-thailand
#12
Kan Sornbundit, Wannapong Triampo, Charin Modchang
In this work, a mathematical model for describing diphtheria transmission in Thailand is proposed. Based on the course of diphtheria infection, the population is divided into 8 epidemiological classes, namely, susceptible, symptomatic infectious, asymptomatic infectious, carrier with full natural-acquired immunity, carrier with partial natural-acquired immunity, individual with full vaccine-induced immunity, and individual with partial vaccine-induced immunity. Parameter values in the model were either directly obtained from the literature, estimated from available data, or estimated by means of sensitivity analysis...
June 2, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/28592545/development-of-a-web-tool-for-escherichia-coli-sub-typing-based-on-fimh-alleles
#13
Louise Roer, Veronika Tchesnokova, Rosa Allesøe, Mariya Muradova, Sujay Chattopadhyay, Johanne Ahrenfeldt, Martin C F Thomsen, Ole Lund, Frank Hansen, Anette M Hammerum, Evgeni Sokurenko, Henrik Hasman
The aim of this study was to construct a valid publicly available method for in silico fimH sub-typing of Escherichia coli particularly suitable for differentiation of fine-resolution subgroups within clonal groups defined by standard multi-locus sequence typing (MLST). FimTyper was constructed as a FASTA database containing all currently known fimH alleles. The software source code is publicly available on https://bitbucket.org/genomicepidemiology/fimtyper, the database freely available at https://bitbucket...
June 7, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28592343/external-validation-of-three-prediction-tools-for-patients-at-risk-of-a-complicated-course-of-clostridium-difficile-infection-disappointing-in-an-outbreak-setting
#14
Yvette H van Beurden, Marjolein P M Hensgens, Olaf M Dekkers, Saskia Le Cessie, Chris J J Mulder, Christina M J E Vandenbroucke-Grauls
OBJECTIVE Estimating the risk of a complicated course of Clostridium difficile infection (CDI) might help doctors guide treatment. We aimed to validate 3 published prediction models: Hensgens (2014), Na (2015), and Welfare (2011). METHODS The validation cohort comprised 148 patients diagnosed with CDI between May 2013 and March 2014. During this period, 70 endemic cases of CDI occurred as well as 78 cases of CDI related to an outbreak of C. difficile ribotype 027. Model calibration and discrimination were assessed for the 3 prediction rules...
June 8, 2017: Infection Control and Hospital Epidemiology
https://www.readbyqxmd.com/read/28592317/modeling-the-spatio-temporal-dynamics-of-porcine-reproductive-respiratory-syndrome-cases-at-farm-level-using-geographical-distance-and-pig-trade-network-matrices
#15
Sara Amirpour Haredasht, Dale Polson, Rodger Main, Kyuyoung Lee, Derald Holtkamp, Beatriz Martínez-López
BACKGROUND: Porcine reproductive and respiratory syndrome (PRRS) is one of the most economically devastating infectious diseases for the swine industry. A better understanding of the disease dynamics and the transmission pathways under diverse epidemiological scenarios is a key for the successful PRRS control and elimination in endemic settings. In this paper we used a two step parameter-driven (PD) Bayesian approach to model the spatio-temporal dynamics of PRRS and predict the PRRS status on farm in subsequent time periods in an endemic setting in the US...
June 7, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/28592316/the-influence-of-climatic-factors-on-the-development-of-hemorrhagic-fever-with-renal-syndrome-and-leptospirosis-during-the-peak-season-in-korea-an-ecologic-study
#16
Yadav Prasad Joshi, Eun-Hye Kim, Hae-Kwan Cheong
BACKGROUND: Hemorrhagic fever with renal syndrome (HFRS) and leptospirosis are seasonal rodent-borne infections in the Republic of Korea (Korea). The occurrences of HFRS and leptospirosis are influenced by climatic variability. However, few studies have examined the effects of local climatic variables on the development of these infections. The purpose of this study was to estimate the effect of climatic factors on the occurrence of HFRS and leptospirosis in Korea. METHODS: Daily records on human cases of HFRS and leptospirosis between January 2001 to December 2009 were analyzed...
June 7, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28592229/the-intention-of-dutch-general-practitioners-to-offer-vaccination-against-pneumococcal-disease-herpes-zoster-and-pertussis-to-people-aged-60%C3%A2-years-and-older
#17
Birthe A Lehmann, Renske Eilers, Liesbeth Mollema, José Ferreira, Hester E de Melker
BACKGROUND: Increasing life expectancy results in a larger proportion of older people susceptible to vaccine preventable diseases (VPDs). In the Netherlands, influenza vaccination is routinely offered to people aged 60 years and older. Vaccination against pneumococcal disease, herpes zoster and pertussis is rarely used. These vaccines will be evaluated by the Dutch Health Council and might be routinely offered to older people in the near future. Possible expansion of the program depends partly on the willingness of general practitioners (GPs) to endorse additional vaccinations...
June 7, 2017: BMC Geriatrics
https://www.readbyqxmd.com/read/28588291/seroprevalence-of-neutralizing-antibodies-against-adenovirus-type-14-and-55-in-healthy-adults-in-southern-china
#18
Xuehua Zheng, Xia Rong, Ying Feng, Xikui Sun, Liang Li, Qian Wang, Min Wang, Wenkuan Liu, Chufang Li, Yiyu Yang, Rong Zhou, Jiahai Lu, Liqiang Feng, Ling Chen
Re-emerging human adenovirus types 14 (Ad14) and 55 (Ad55) have caused severe respiratory diseases and even deaths during recent outbreaks. However, the seroprevalence of neutralizing antibodies (nAbs) in healthy adults, which may reflect previous circulation and help to predict potential outbreaks, remains unclear. In this study, we established micro-neutralizing (MN) assays on the basis of recombinant Ad14 and Ad55 reporter viruses, and we investigated serum nAbs in healthy blood donors from Southern China...
June 7, 2017: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/28587080/predicting-zoonotic-risk-of-influenza-a-viruses-from-host-tropism-protein-signature-using-random-forest
#19
Christine L P Eng, Joo Chuan Tong, Tin Wee Tan
Influenza A viruses remain a significant health problem, especially when a novel subtype emerges from the avian population to cause severe outbreaks in humans. Zoonotic viruses arise from the animal population as a result of mutations and reassortments, giving rise to novel strains with the capability to evade the host species barrier and cause human infections. Despite progress in understanding interspecies transmission of influenza viruses, we are no closer to predicting zoonotic strains that can lead to an outbreak...
May 25, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28583742/visual-and-motor-deficits-in-grown-up-mice-with-congenital-zika-virus-infection
#20
Liyuan Cui, Peng Zou, Er Chen, Hao Yao, Hao Zheng, Qian Wang, Jing-Ning Zhu, Shibo Jiang, Lu Lu, Jiayi Zhang
Human infants with congenital Zika virus (ZIKV) infection exhibit a range of symptoms including microcephaly, intracranial calcifications, macular atrophy and arthrogryposis. More importantly, prognosis data have lagged far behind the recent outbreak of ZIKV in 2015. In this work, we allow congenitally ZIKV-infected mice to grow into puberty. These mice exhibited motor incoordination and visual dysfunctions, which can be accounted by anatomical defects in the retina and cerebellar cortex. In contrary, anxiety level of the ZIKV-infected mice is normal...
April 24, 2017: EBioMedicine
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