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https://www.readbyqxmd.com/read/27915438/variations-in-clinical-presentation-and-anatomical-distribution-of-gross-lesions-of-african-swine-fever-in-domestic-pigs-in-the-southern-highlands-of-tanzania-a-field-experience
#1
Maulilio John Kipanyula, Solomon Wilson Nong'ona
African swine fever is a contagious viral disease responsible for up to 100% mortality among domestic pigs. A longitudinal study was carried out to determine the clinical presentation and anatomical distribution of gross lesions in affected pigs in Mbeya region, Tanzania during the 2010 to 2014 outbreaks. Data were collected during clinical and postmortem examination by field veterinarians and using a structured questionnaire. A total of 118 respondents (100%) showed awareness about African swine fever. During previous outbreaks, the mortality rate was almost 100%, while in 2014 it was estimated to be less than 50%...
December 3, 2016: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/27915247/genomic-diversity-of-bacteriophages-infecting-the-fish-pathogen-flavobacterium-psychrophilum
#2
Daniel Castillo, Mathias Middelboe
Bacteriophages infecting the fish pathogen Flavobacterium psychrophilum can potentially be used to prevent and control outbreaks of this bacterium in salmonid aquaculture. However, application of bacteriophages in disease control requires detailed knowledge on their genetic composition. To explore the diversity of F. pyschrophilum bacteriophages we have analyzed the complete genome sequences of 17 phages isolated from two distant geographic areas (Denmark and Chile), including the previously characterized temperate bacteriophage 6H...
December 2, 2016: FEMS Microbiology Letters
https://www.readbyqxmd.com/read/27915211/impact-of-waning-acquired-immunity-and-asymptomatic-infections-on-case-control-studies-for-enteric-pathogens
#3
Arie H Havelaar, Arno Swart
Case-control studies of outbreaks and of sporadic cases of infectious diseases may provide a biased estimate of the infection rate ratio, due to selecting controls that are not at risk of disease. We use a dynamic mathematical model to explore biases introduced in results drawn from case-control studies of enteric pathogens by waning and boosting of immunity, and by asymptomatic infections, using Campylobacter jejuni as an example. Individuals in the population are either susceptible (at risk of infection and disease), fully protected (not at risk of either) or partially protected (at risk of infection but not of disease)...
November 28, 2016: Epidemics
https://www.readbyqxmd.com/read/27915096/universal-contact-precautions-do-not-change-the-prevalence-of-antibiotic-resistant-organisms-in-a-tertiary-burn-unit
#4
Adelyn L Ho, Reid Chambers, Claudia Malic, Anthony Papp
OBJECTIVE: The prevalence of antibiotic-resistant organisms (ARO) in burn units is increasing worldwide and contributes significantly to morbidity and mortality. Study aims are to describe the burden of AROs in burn patients admitted to a tertiary burn unit, to evaluate the impact of contact precautions implemented after an outbreak of antibiotic-resistant Acinetobacter baumannii, and to identify possible predictors of ARO acquisition. METHODS: Data of burn inpatients between 2006 and 2010 were retrospectively reviewed...
November 30, 2016: Burns: Journal of the International Society for Burn Injuries
https://www.readbyqxmd.com/read/27914957/multiple-locus-variable-number-tandem-repeat-analysis-mlva-of-shigella-sonnei-isolates-of-2012-outbreak-i-r-iran
#5
Bita Bakhshi, Bahareh Bayat, Abdolaziz Rastegar Lari
Shigella sonnei is a major cause of diarrhea especially in children. Molecular study can help to determine the outbreak of this bacterium. Multiple-Locus Variable number tandem repeat Analysis (MLVA) will largely influence the public health field by introducing newer, faster, safer, and effective procedure for typing of microorganisms. A total of fifty shigella isolates were collected between November 2012 to October 2013 in Tehran, Iran. The strains were identified base on biochemical and molecular tests. Subsequently, all shigella species were confirmed by species-specific polymerase chain reaction (PCR)...
November 30, 2016: Microbial Pathogenesis
https://www.readbyqxmd.com/read/27914930/biological-fitness-and-natural-selection-of-amantadine-resistant-variants-of-avian-influenza-h5n1-viruses
#6
El-Sayed M Abdelwhab, Jutta Veits, Thomas C Mettenleiter
Outbreaks caused by the highly pathogenic H5N1 avian influenza virus (A/H5N1) devastated the poultry industry in several countries and posed a significant pandemic threat. In addition to culling of infected poultry and vaccination, amantadine has been applied in poultry in some countries to control the spread of the virus. The prevalence of the amantadine resistance marker at position 31 (Ser31Asn) of the M2 protein increased over time. However, little is known about the biological fitness and selection of H5N1 amantadine resistant strains over their sensitive counterparts...
November 30, 2016: Virus Research
https://www.readbyqxmd.com/read/27914649/nosocomial-outbreak-of-extensively-drug-resistant-pseudomonas-aeruginosa-associated-with-aromatherapy
#7
Astrid Mayr, Guido Hinterberger, Ingo H Lorenz, Peter Kreidl, Wolfgang Mutschlechner, Cornelia Lass-Flörl
An increase of extensively drug-resistant Pseudomonas aeruginosa (XDR-PA) in various clinical specimens among intensive care unit patients (n = 7) initiated an outbreak investigation consisting of patient data analyses, control of adherence to infection control guidelines, microbiologic surveys, and molecular-based studies. XDR-PA was detected in a jointly used aroma-oil nursing bottle for aromatherapy. We implemented the restriction of oil sharing among patients. Hence, the outbreak was controlled successfully...
November 30, 2016: American Journal of Infection Control
https://www.readbyqxmd.com/read/27914222/molecular-diversity-of-human-parvovirus-b19-during-two-outbreaks-of-erythema-infectiosum-in-brazil
#8
Rita de Cássia Nasser Cubel Garcia, Renata Freire Alves Pereira, Kátia Martins Lopes de Azevedo, Tatiana Xavier de Castro, Francisco C A Mello, Sérgio Setubal, Marilda M Siqueira, David Brown, Solange Artimos de Oliveira
This study was conducted to provide information on the genetic diversity of human parvovirus B19 (B19V) circulating in the municipality of Niterói, Rio de Janeiro, Southeast Brazil during 1996-2006, a period with two distinct outbreaks of B19V infection: 1999-2000 and 2004-2005. A total of 27 sera from patients with erythema infectiosum (EI) and five sera from HIV-infected patients that tested positive for B19V DNA during the study period were analyzed. To genotype B19V strains, a semi-nested PCR for partial amplification of the capsid gene was performed and sequence analysis revealed that 31 sequences belonged to subgenotype 1a (G1a) of the main genotype 1 and one sequence was characterized as subgenotype 3b (G3b)...
November 30, 2016: Brazilian Journal of Infectious Diseases
https://www.readbyqxmd.com/read/27914145/differential-cell-count-and-crp-level-in-blood-as-predictors-for-middle-east-respiratory-syndrome-coronavirus-infection-in-acute-febrile-patients-during-nosocomial-outbreak
#9
Ga Eun Park, Cheol In Kang, Jae Hoon Ko, Sun Young Cho, Young Eun Ha, Yae Jean Kim, Kyong Ran Peck, Jae Hoon Song, Doo Ryeon Chung
A case-control study was performed to identify clinical predictors for Middle East respiratory syndrome coronavirus (MERS-CoV) infection among patients with acute febrile illness during the nosocomial outbreak. Patients with MERS-CoV were more likely to have monocytosis with normal white blood cell (WBC) count and lower C-reactive protein (CRP) level. Simple laboratory data such as complete blood counts (CBC) with differential count could be a useful marker for the prediction of MERS and triage at the initial presentation of acute febrile patients in outbreak setting...
January 2017: Journal of Korean Medical Science
https://www.readbyqxmd.com/read/27913979/genetic-diversity-of-the-genotype-vii-newcastle-disease-virus-identification-of-a-novel-viij-sub-genotype
#10
Cong Xue, Yanlong Cong, Renfu Yin, Yixue Sun, Chan Ding, Shengqing Yu, Xiufan Liu, Shunlin Hu, Jing Qian, Qianliang Yuan, Mingxi Yang, Chunfeng Wang, Zhuang Ding
Newcastle disease (ND) is a highly contagious disease of poultry caused by Newcastle disease virus (NDV). Multiple genotypes of NDV have been circulating worldwide and NDV is continuously evolving, resulting into more diversity. Of multiple viral genotypes, VII is particularly important given that it had been associated with most recent ND outbreaks worldwide. In this study, an epidemiological investigation performed in northeastern China during 2014-2015 showed that 11 genotype VII isolates amounted to 55 percent in a total number of NDV isolates...
December 2, 2016: Virus Genes
https://www.readbyqxmd.com/read/27913131/using-phenomenological-models-for-forecasting-the-2015-ebola-challenge
#11
Bruce Pell, Yang Kuang, Cecile Viboud, Gerardo Chowell
BACKGROUND: The rising number of novel pathogens threatening the human population has motivated the application of mathematical modeling for forecasting the trajectory and size of epidemics. MATERIALS AND METHODS: We summarize the real-time forecasting results of the logistic equation during the 2015 Ebola challenge focused on predicting synthetic data derived from a detailed individual-based model of Ebola transmission dynamics and control. We also carry out a post-challenge comparison of two simple phenomenological models...
November 19, 2016: Epidemics
https://www.readbyqxmd.com/read/27912729/genomic-insights-from-whole-genome-sequencing-of-four-clonal-outbreak-campylobacter-jejuni-assessed-within-the-global-c-jejuni-population
#12
Clifford G Clark, Chrystal Berry, Matthew Walker, Aaron Petkau, Dillon O R Barker, Cai Guan, Aleisha Reimer, Eduardo N Taboada
BACKGROUND: Whole genome sequencing (WGS) is useful for determining clusters of human cases, investigating outbreaks, and defining the population genetics of bacteria. It also provides information about other aspects of bacterial biology, including classical typing results, virulence, and adaptive strategies of the organism. Cell culture invasion and protein expression patterns of four related multilocus sequence type 21 (ST21) C. jejuni isolates from a significant Canadian water-borne outbreak were previously associated with the presence of a CJIE1 prophage...
December 3, 2016: BMC Genomics
https://www.readbyqxmd.com/read/27912127/hyperferritinemia-is-a-potential-marker-of-chronic-chikungunya-a-retrospective-study-on-the-island-of-cura%C3%A3-ao-during-the-2014-2015-outbreak
#13
Fatih Anfasa, Lisette Provacia, Corine GeurtsvanKessel, Robert Wever, Izzy Gerstenbluth, Albert D M E Osterhaus, Byron E E Martina
BACKGROUND: Recently Chikungunya virus (CHIKV) outbreaks have been reported in the Carribean. There is no data regarding the outbreak in Curaçao. In addition, to date there is no biomarker that could be used to predict chronic infection. OBJECTIVES: To characterize the first CHIKV outbreak in Curaçao and to identify potential biomarkers for chronic infection. STUDY DESIGN: A serological test and quantitative polymerase chain reaction (qPCR) were used on samples collected in Curaçao to confirm infection...
November 18, 2016: Journal of Clinical Virology: the Official Publication of the Pan American Society for Clinical Virology
https://www.readbyqxmd.com/read/27912126/evaluation-of-the-inactivation-effect-of-triton-x-100-on-ebola-virus-infectivity
#14
Francesca Colavita, Serena Quartu, Eleonora Lalle, Licia Bordi, Daniele Lapa, Silvia Meschi, Antonella Vulcano, Antonietta Toffoletti, Eugenio Bordi, Maria Grazia Paglia, Antonino Di Caro, Giuseppe Ippolito, Maria Rosaria Capobianchi, Concetta Castilletti
BACKGROUND: The recent Ebola virus disease outbreak occurred in West Africa since December 2013 highlighted the need of appropriate virus inactivation procedures to be set up to allow the necessary processing of specimens outside BSL-4 facilities and to perform laboratory tests without affecting clinical decisions. For this purpose, international guidelines suggest the pre-treatment of the samples with Triton X-100. OBJECTIVES: Due to the limited scientific evidence about the efficacy of Triton X-100 on enveloped-viruses, the aim of this work was to evaluate the effect of Triton X-100 on the virus infectivity and to establish the optimal conditions for its use...
November 22, 2016: Journal of Clinical Virology: the Official Publication of the Pan American Society for Clinical Virology
https://www.readbyqxmd.com/read/27911695/dengue-virus-isolation-in-mosquito-aedes-albopictus-captured-during-an-outbreak-in-tokyo-2014-by-a-method-relying-on-antibody-dependent-enhancement-mechanism-using-fc%C3%AE-r-expressing-bhk-cells
#15
Meng Ling Moi, Daisuke Kobayashi, Haruhiko Isawa, Toshinori Sasaki, Masayuki Saijo, Ichiro Kurane, Kyoko Sawabe, Tomohiko Takasaki
Dengue virus (DENV) isolation from mosquitoes is necessary for providing definitive evidence of virus circulation, and is critical for further virological characterization and determination of epidemiological characteristics. By using Aedes albopictus mosquitoes captured during an outbreak in Tokyo in 2014, we compared the DENV isolation rates of a conventional virus isolation method that uses C6/36 mosquito cells as assay cells with those of a virus isolation method that relies on an antibody-dependent enhancement (ADE) mechanism by using FcγR-expressing baby hamster kidney (BHK) cells and an antibody with ADE activity...
December 2016: Vector Borne and Zoonotic Diseases
https://www.readbyqxmd.com/read/27910909/the-disinfection-characteristics-of-ebola-virus-outbreak-variants
#16
Bradley W M Cook, Todd A Cutts, Aidan M Nikiforuk, Anders Leung, Darwyn Kobasa, Steven S Theriault
The recent Ebola virus outbreak in West Africa has forced experts to re-evaluate their understanding of how to best disinfect areas contaminated with infectious bodily fluids. Recent research has found that Ebola virus remains viable in blood for 7-10 days making appropriate disinfection crucial to infection control. We sought to determine if the three most important outbreak variants of Zaire ebolavirus (Mayinga, Kikwit and Makona) exhibit separate phenotypes when challenged with a range of sodium hypochlorite (NaOCl) concentrations or 70% ethanol (EtOH) at average West African temperature...
December 2, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27910805/ebola-virus-vaccines-where-do-we-stand
#17
REVIEW
Vincent Pavot
The recent outbreak of Ebola virus disease in West Africa has led to more than 11,000 deaths, with a peak in mortality from August through December of 2014. A meeting convened by the World Health Organization (WHO) in September 2014, concluded that an urgent unmet need exists for efficacy and safety testing of the Ebola virus vaccine candidates and that clinical trials should be expedited. These vaccines could be used both in an outbreak setting and to provide long-term protection in populations at risk of sporadic outbreaks...
October 28, 2016: Clinical Immunology: the Official Journal of the Clinical Immunology Society
https://www.readbyqxmd.com/read/27909946/norovirus-gii-17-outbreak-linked-to-an-infected-post-symptomatic-food-worker-in-a-french-military-unit-located-in-france
#18
Marc-Antoine Sanchez, Simon-Pierre Corcostégui, Charles-Arnaud De Broucker, Olivier Cabre, Stéphanie Watier-Grillot, Sylvie Perelle, Katia Ambert-Balay, Vincent Pommier de Santi
In February 2016, an outbreak of gastroenteritis occurred in a French military unit located in Poitiers, France. Attack rate was of 34% (103/300). A case-control study identified association between illness and cake consumption. Stool samples were tested positive for Norovirus GII.17 for one patient and one post-symptomatic food worker (FW). The FW presented vomiting one day before cake preparation. The NoV strain was probably spread through food worker hand contact. Prevention of Norovirus foodborne outbreaks implies new guidelines for FWs management in France and Europe...
December 1, 2016: Food and Environmental Virology
https://www.readbyqxmd.com/read/27909855/conifer-monoterpene-chemistry-during-an-outbreak-enhances-consumption-and-immune-response-of-an-eruptive-folivore
#19
Amy M Trowbridge, M Deane Bowers, Russell K Monson
Changes in the chemical composition of plant defense compounds during herbivory can impact herbivore resource allocation patterns and thereby herbivore survival, growth, and immune response against endoparasitoid infection. Few studies have investigated folivore responses to changes in plant chemistry that occur under outbreak conditions in mature conifer systems. Using data from an earlier observational field study, we carried out laboratory bioassays to test how variation in monoterpenes in piñon pine trees (Pinus edulis, Pinaceae) during an outbreak affects growth, consumption, and immune response of a specialist herbivore, the Southwestern tiger moth (Lophocampa ingens, Arctiidae)...
December 1, 2016: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/27909693/unfractionated-and-low-molecular-weight-heparin-and-the-phosphodiesterase-inhibitors-ibmx-and-cilostazol-block-ex-vivo-equid-herpesvirus-type-1-induced-platelet-activation
#20
Tracy Stokol, Priscila B D Serpa, Muhammad N Zahid, Marjory B Brooks
Equid herpes virus type-1 (EHV-1) is a major pathogen of horses, causing abortion storms and outbreaks of herpes virus myeloencephalopathy. These clinical syndromes are partly attributed to ischemic injury from thrombosis in placental and spinal vessels. The mechanism of thrombosis in affected horses is unknown. We have previously shown that EHV-1 activates platelets through virus-associated tissue factor-initiated thrombin generation. Activated platelets participate in thrombus formation by providing a surface to localize coagulation factor complexes that amplify and propagate thrombin generation...
2016: Frontiers in Veterinary Science
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