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https://www.readbyqxmd.com/read/28431114/molecular-characterization-of-cryptococcus-neoformans-isolated-from-the-environment-in-beijing-china
#1
Hongtao Dou, Huizhu Wang, Shaowei Xie, Xinxin Chen, Zhipeng Xu, Yingchun Xu
The molecular type of environmental Cryptococcus neoformans in Beijing was not clear. Our study aims to reveal the molecular characterization of C. neoformans complex from environment in Beijing, China. A total of 435 samples of pigeon droppings from 11 different homes in Beijing were collected from August to November in 2015. Pigeon droppings were inoculated onto caffeic acid cornmeal agar (CACA) to screen C. neoformans complex. Bruker Biotyper matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) was performed for species identification...
April 20, 2017: Medical Mycology: Official Publication of the International Society for Human and Animal Mycology
https://www.readbyqxmd.com/read/28428781/analysis-of-the-listeria-monocytogenes-population-structure-among-isolates-from-1931-to-2015-in-australia
#2
Amy V Jennison, Jesse J Masson, Ning-Xia Fang, Rikki M Graham, Mark I Bradbury, Narelle Fegan, Kari S Gobius, Trudy M Graham, Christine J Guglielmino, Janelle L Brown, Edward M Fox
Listeriosis remains among the most important bacterial illnesses, with a high associated mortality rate. Efforts to control listeriosis require detailed knowledge of the epidemiology of the disease itself, and its etiological bacterium, Listeria monocytogenes. In this study we provide an in-depth analysis of the epidemiology of 224 L. monocytogenes isolates from Australian clinical and non-clinical sources. Non-human sources included meat, dairy, seafood, fruit, and vegetables, along with animal and environmental isolates...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28427991/impact-of-the-pneumococcal-conjugate-vaccine-on-serotype-distribution-of-adult-non-invasive-streptococcus-pneumoniae-isolates-in-tokai-region-japan-2008-2016
#3
Yuri Furuya, Yuka Yamagishi, Hayato Okade, Takumi Kadota, Tori Funatsu, Maki Eto, Nobuhiko Nomura, Junichi Mitsuyama, Hiroshige Mikamo
The introduction of the 7-valent pneumococcal conjugate vaccine (PCV7) in February 2010 markedly reduced the burden of invasive pneumococcal disease and changed serotype distribution in Japan. In November 2013, PCV7 was replaced by the 13-valent pneumococcal conjugate vaccine (PCV13). We investigated the serotype distribution and susceptibility trends of non-invasive Streptococcus pneumoniae isolates collected from adult patients. A total of 504 pneumococcal isolates were collected during 4 periods between 2008 and 2016 (Period 1; between June 2008 and April 2009, Period 2; between September 2010 and March 2011, Period 3; between October 2011 and March 2012, Period 4; between August 2015 and January 2016)...
April 17, 2017: Journal of Infection and Chemotherapy: Official Journal of the Japan Society of Chemotherapy
https://www.readbyqxmd.com/read/28427960/construct-and-expression-of-recombinant-domains-i-ii-of-dengue-virus-2-and-its-efficacy-to-evaluate-immune-response-in-endemic-area-possible-use-in-prognosis
#4
Alfredo Eduardo Montes-Gómez, Hector Vivanco-Cid, José Bustos-Arriaga, Mussaret Bano Zaidi, Jazmin Garcia Machorro, Benito Gutierrez-Castañeda, Leticia Cedillo-Barron
The envelope (E) protein from DENV, contain three functional and structural domains (DI, DII and DIII). Some studies suggest that neutralizing antibodies during natural DENV infection are predominantly against DI and DII, in contrast, low proportion of the antibodies were against DIII. Thus it is necessary to establish the proportion of human antibodies against DENV E protein that bind to DI and DII during the normal course of infection; as an indicator of the quality of the antibody response and to further design new vaccine candidates for DENV...
April 17, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28427958/micro-anatomical-changes-in-major-blood-vessel-caused-by-dengue-virus-serotype-2-infection
#5
Sivan Padma Priya, S Sakinah, Mok Pooi Ling, Hui-Yee Chee, Akon Higuchi, Rukman Awang Hamat, Vasantha Kumari Neela, Abdullah A Alarfaj, Murugan A Munusamy, Ashraf A Hatamleh, Ahmed E Al-Sabri, Ibrahim Ahmad Abdulaziz Al-Suwailem, Mariappan Rajan, Giovanni Benelli, Marlina, S Suresh Kumar
Dengue virus (DENV) has emerged as a major economic concern in developing countries, with 2.5 billion people believed to be at risk. Vascular endothelial cells (ECs) lining the circulatory system from heart to end vessels perform crucial functions in the human body, by aiding gas exchange in lungs, gaseous, nutritional and its waste exchange in all tissues, including the blood brain barrier, filtration of fluid in the glomeruli, neutrophil recruitment, hormone trafficking, as well as maintenance of blood vessel tone and hemostasis...
April 17, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28427840/aav-id-a-rapid-and-robust-assay-for-batch-to-batch-consistency-evaluation-of-aav-preparations
#6
Simon Pacouret, Mohammed Bouzelha, Rajani Shelke, Eva Andres-Mateos, Ru Xiao, Anna Maurer, Mathieu Mevel, Heikki Turunen, Trisha Barungi, Magalie Penaud-Budloo, Frédéric Broucque, Véronique Blouin, Philippe Moullier, Eduard Ayuso, Luk H Vandenberghe
Adeno-associated virus (AAV) vectors are promising clinical candidates for therapeutic gene transfer, and a number of AAV-based drugs may emerge on the market over the coming years. To insure the consistency in efficacy and safety of any drug vial that reaches the patient, regulatory agencies require extensive characterization of the final product. Identity is a key characteristic of a therapeutic product, as it ensures its proper labeling and batch-to-batch consistency. Currently, there is no facile, fast, and robust characterization assay enabling to probe the identity of AAV products at the protein level...
April 17, 2017: Molecular Therapy: the Journal of the American Society of Gene Therapy
https://www.readbyqxmd.com/read/28425925/evaluation-of-the-immunomodulatory-properties-of-streptococcus-suis-and-group-b-streptococcus-capsular-polysaccharides-on-the-humoral-response
#7
Cynthia Calzas, Morgan Taillardet, Insaf Salem Fourati, David Roy, Marcelo Gottschalk, Hugo Soudeyns, Thierry Defrance, Mariela Segura
Streptococcus suis and group B Streptococcus (GBS) are encapsulated streptococci causing septicemia and meningitis. Antibodies (Abs) against capsular polysaccharides (CPSs) have a crucial protective role, but the structure/composition of the CPS, including the presence of sialic acid, may interfere with the generation of anti-CPS Ab responses. We investigated the features of the CPS-specific Ab response directed against S. suis serotypes 2 and 14 and GBS serotypes III and V after infection or immunization with purified native or desialylated CPSs in mice...
April 20, 2017: Pathogens
https://www.readbyqxmd.com/read/28424485/in-vivo-dynamics-of-aav-mediated-gene-delivery-to-sensory-neurons-of-the-trigeminal-ganglia
#8
Chung H Dang, Martine Aubert, Harshana S De Silva Feelixge, Kurt Diem, Michelle A Loprieno, Pavitra Roychoudhury, Daniel Stone, Keith R Jerome
The ability to genetically manipulate trigeminal ganglion (TG) neurons would be useful in the study of the craniofacial nervous system and latent alphaherpesvirus infections. We investigated adeno-associated virus (AAV) vectors for gene delivery to the TG after intradermal whiskerpad delivery in mice. We demonstrated that AAV vectors of serotypes 1, 7, 8, and 9 trafficked from the whiskerpad into TG neurons and expressed transgenes within cell bodies and axons of sensory neurons in all three branches of the TG...
April 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28424198/pneumococcal-capsular-polysaccharide-immunity-in-the-elderly
#9
Hugh Adler, Daniela M Ferreira, Stephen B Gordon, Jamie Rylance
Immunity against pneumococcal infections is impaired in older people, and current vaccines are poorly protective against pneumococcal disease in this population. Naturally-acquired immunity against pneumococcal capsular polysaccharides develops during childhood and is robust in young adults, but deteriorates with advanced age. In particular, antibody levels and function are reduced in older people. Pneumococcal vaccines are recommended for people over 65 years of age. However, the benefits of polysaccharide and protein-conjugated vaccines in this population are small, due to both serotype replacement and incomplete protection against vaccine-serotype pneumococcal disease...
April 19, 2017: Clinical and Vaccine Immunology: CVI
https://www.readbyqxmd.com/read/28423326/rapid-molecular-profiling-of-defined-cell-types-using-viral-trap
#10
Alexander R Nectow, Maria V Moya, Mats I Ekstrand, Awni Mousa, Kelly L McGuire, Caroline E Sferrazza, Bianca C Field, Gabrielle S Rabinowitz, Kirsty Sawicka, Yupu Liang, Jeffrey M Friedman, Nathaniel Heintz, Eric F Schmidt
Translational profiling methodologies enable the systematic characterization of cell types in complex tissues, such as the mammalian brain, where neuronal isolation is exceptionally difficult. Here, we report a versatile strategy for profiling CNS cell types in a spatiotemporally restricted fashion by engineering a Cre-dependent adeno-associated virus expressing an EGFP-tagged ribosomal protein (AAV-FLEX-EGFPL10a) to access translating mRNAs by translating ribosome affinity purification (TRAP). We demonstrate the utility of this AAV to target a variety of genetically and anatomically defined neural populations expressing Cre recombinase and illustrate the ability of this viral TRAP (vTRAP) approach to recapitulate the molecular profiles obtained by bacTRAP in corticothalamic neurons across multiple serotypes...
April 18, 2017: Cell Reports
https://www.readbyqxmd.com/read/28423309/the-natural-product-cavinafungin-selectively-interferes-with-zika-and-dengue-virus-replication-by-inhibition-of-the-host-signal-peptidase
#11
David Estoppey, Chia Min Lee, Marco Janoschke, Boon Heng Lee, Kah Fei Wan, Hongping Dong, Philippe Mathys, Ireos Filipuzzi, Tim Schuhmann, Ralph Riedl, Thomas Aust, Olaf Galuba, Gregory McAllister, Carsten Russ, Martin Spiess, Tewis Bouwmeester, Ghislain M C Bonamy, Dominic Hoepfner
Flavivirus infections by Zika and dengue virus impose a significant global healthcare threat with no US Food and Drug Administration (FDA)-approved vaccination or specific antiviral treatment available. Here, we present the discovery of an anti-flaviviral natural product named cavinafungin. Cavinafungin is a potent and selectively active compound against Zika and all four dengue virus serotypes. Unbiased, genome-wide genomic profiling in human cells using a novel CRISPR/Cas9 protocol identified the endoplasmic-reticulum-localized signal peptidase as the efficacy target of cavinafungin...
April 18, 2017: Cell Reports
https://www.readbyqxmd.com/read/28423088/the-epidemiology-of-cryptococcosis-and-the-characterization-of-cryptococcus-neoformans-isolated-in-a-brazilian-university-hospital
#12
Paula Augusta Dias Fogaça de Aguiar, Reginaldo Dos Santos Pedroso, Aércio Sebastião Borges, Tomaz de Aquino Moreira, Lúcio Borges de Araújo, Denise Von Dolinger de Brito Röder
Cryptococcosis, a systemic disease caused by the fungus Cryptococcus neoformans/ Cryptococcus gattii is more severe in immunocompromised individuals. This study aimed to analyze the epidemiology of the disease, the molecular characteristics and the antifungal susceptibility of C. neoformans isolated from patients treated in a Brazilian university hospital. This retrospective study was conducted in the Clinical Hospital, Federal University of Uberlândia, and evaluated cases of cryptococcosis and strains of C...
April 13, 2017: Revista do Instituto de Medicina Tropical de São Paulo
https://www.readbyqxmd.com/read/28422567/evaluation-of-serotypes-5-and-8-capsular-polysaccharides-in-protection-against-staphylococcus-aureus-in-murine-models-of-infection
#13
Brian L Cheng, Travis B Nielsen, Paul Pantapalangkoor, Fan Zhao, Jean C Lee, Christopher P Montgomery, Brian Luna, Brad Spellberg, Robert S Daum
Staphylococcus aureus is the leading cause of nosocomial and community-acquired infections, including soft tissue and skin infections and bacteremia. However, efforts to develop an effective vaccine against S. aureus infections have not been successful. We evaluated serotypes 5 and 8 capsule polysaccharides (CP) CRM197 conjugates as vaccine candidates in murine models of bacteremia, lethal sepsis, and skin infection. The conjugate vaccines elicited a good antibody response, and active immunization of CP5-CRM or CP8-CRM conjugates protected against staphylococcal bacteremia...
April 19, 2017: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/28422128/epidemiology-of-45-616-suspect-cases-of-hand-foot-and-mouth-disease-in-chongqing-china-2011-2015
#14
Jian Tao, Xiao-Yan He, Yu Shi, Guohun Zhu, Shan Liu, Zhenzhen Zhang, Shi Tang, Rong Zhang, Bin Peng, Zhidai Liu, Junjie Tan, Qian Chen, Xingbin Wang, Liming Bao, Lin Zou, Penghui Zhang
Epidemiology and etiology of hand, foot, and mouth disease (HFMD) based on large sample size or evaluation of detection for more enterovirus serotypes are not well investigated in Chongqing of China. 45,616 suspect HFMD patients were prospectively enrolled among whom 21,615 were laboratory confirmed HFMD cases over a 5-year period (January 2011 to December 2015). Their epidemiological, clinical, and laboratory data were extracted and stratified by month, age, sex, disease severity, and enterovirus serotype...
April 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28422007/high-risk-of-dengue-type-2-outbreak-in-french-polynesia-2017
#15
Maite Aubry, Yoann Teissier, Mihiau Mapotoeke, Anita Teissier, Marine Giard, Didier Musso, Van-Mai Cao-Lormeau
In French Polynesia, the four serotypes of dengue virus (DENV-1 to -4) have caused 14 epidemics since the mid-1940s. From the end of 2016, an increasing number of Pacific Island Countries and Territories have reported DENV-2 outbreaks and in February 2017, DENV-2 infection was detected in French Polynesia in three travellers from Vanuatu. As DENV-2 has not been circulating in French Polynesia since December 2000, there is high risk for an outbreak to occur.
April 6, 2017: Euro Surveillance: Bulletin Européen sur les Maladies Transmissibles, European Communicable Disease Bulletin
https://www.readbyqxmd.com/read/28421811/characterization-of-ornithobacterium-rhinotracheale-field-isolates-from-hungary
#16
Réka Szabó, Enikő Wehmann, László Makrai, Csaba Nemes, Éva Gyuris, Ákos Thuma, Tibor Magyar
Ornithobacterium rhinotracheale is a widely distributed rod-shaped gram-negative bacterium that infects several avian species including chickens and turkeys. It is associated with respiratory signs, growth retardation, mortality, and reduced egg production thus causing severe economic losses to the poultry industries. In this study, 37 field isolates of O. rhinotracheale, collected from various locations in Hungary between 1997 and 2015, were identified and molecularly characterized by the analysis of partial 16S rRNA gene sequences, enterobacterial repetitive intergenic consensus (ERIC)-PCR and random amplified polymorphic DNA (RAPD) PCR assays with the OPG11, OPH19, and M13 primers...
April 19, 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28421694/molecular-engineering-and-plant-expression-of-an-immunoglobulin-heavy-chain-scaffold-for-delivery-of-a-dengue-vaccine-candidate
#17
Mi-Young Kim, Craig Van Dolleweerd, Alastair Copland, Matthew John Paul, Sven Hofmann, Gina R Webster, Emily Julik, Ivonne Ceballos-Olvera, Jorge Reyes-Del Valle, Moon-Sik Yang, Yong-Suk Jang, Rajko Reljic, Julian K Ma
In order to enhance vaccine uptake by the immune cells in vivo, molecular engineering approach was employed to construct a Polymeric Immunoglobulin G Scaffold (PIGS) that incorporates multiple copies of an antigen and targets the Fc gamma receptors on antigen-presenting cells. These self-adjuvanting immunogens were tested in the context of dengue infection, for which there is currently no globally licensed vaccine yet. Thus, the consensus domain III sequence (cEDIII) of dengue glycoprotein E was incorporated into PIGS and expressed in both tobacco plants and Chinese Ovary Hamster cells...
April 19, 2017: Plant Biotechnology Journal
https://www.readbyqxmd.com/read/28421169/high-prevalence-of-virulence-genes-in-specific-genotypes-of-atypical-enteropathogenic-escherichia-coli
#18
Yanmei Xu, Xiangning Bai, Yujuan Jin, Bin Hu, Hong Wang, Hui Sun, Ruyue Fan, Shanshan Fu, Yanwen Xiong
Atypical enteropathogenic Escherichia coli (aEPEC) strains are emerging enteropathogens that have been detected worldwide. A collection of 228 aEPEC strains (121 from diarrheal patients, 27 from healthy carriers, 47 from animals and 33 from raw meats) were investigated for serotypes, virulence gene profiles and phylogenetic relationships. Sixty-six O serogroups were identified. Serogroup O51 was the most prevalent, followed by O119, O26 and O76. For the 20 virulence genes detected, statistically significant differences were observed in the overall prevalence of efa1 (lifA), nleB, nleE, set/ent, paa, and ehxA genes among strains from diarrheal patients, healthy carriers, animals and raw meats, respectively...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28420823/listeria-monocytogenes-serotype-4b-strains-replicate-in-monocytes-macrophages-more-than-the-other-serotypes
#19
Rie Hasebe, Ryo Nakao, Aiko Ohnuma, Takeshi Yamasaki, Hirofumi Sawa, Shinji Takai, Motohiro Horiuchi
We analyzed the pathogenicity of various serotypes of Listeria monocytogenes using a Balb/c mouse intravenous injection model. The survival rates of mice inoculated with strains NS1/2b (serotype 1/2b), NS3b (serotype 3b) and NS 4b (serotype 4b) were 60%, 63.6% and 63.6%, respectively. Although the survival rates were similar, the bacterial growth in the liver of NS3b-infected mice was 144.5-fold higher than that in the liver of NS4b-infected mice. Histopathological analyses suggest that the NS4b strain replicated more in monocytes/macrophages, whereas the NS3b strain replicated more in hepatocytes...
April 17, 2017: Journal of Veterinary Medical Science
https://www.readbyqxmd.com/read/28420553/incidence-of-respiratory-viral-infections-and-associated-factors-among-children-attending-a-public-kindergarten-in-taipei-city
#20
Chun-Yi Lu, Li-Min Huang, Tsui-Yien Fan, A-Ling Cheng, Luan-Yin Chang
BACKGROUND: Kindergarteners frequently encounter various infectious diseases, so surveillance of viral infectious diseases would provide information for their health promotion. METHODS: We enrolled kindergarten attendees, age 2-5 years, during the academic years of 2006 and 2007 in a Taipei City kindergarten. Daily monitoring of illness and regular biweekly physical examinations were undertaken. Multiple infections were defined as one child having two or more laboratory-confirmed viral infections with different viruses or different serotypes during one academic year...
April 15, 2017: Journal of the Formosan Medical Association, Taiwan Yi Zhi
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