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https://www.readbyqxmd.com/read/28935730/conservation-and-recombination-in-the-genome-sequence-of-haemophilus-influenzae-type-f-waphl1
#1
Allen C Bateman, Ailyn C Perez-Osorio, Zhen Li, Michael Tran, Alexander L Greninger
We report here the second draft genome sequence of a bloodstream isolate of Haemophilus influenzae serotype f. Three discrete 3.1- to 7.8-kb sites contained 80% of the variability in the genome, consistent with recombination in known virulence factors.
September 21, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28935107/glycoengineered-outer-membrane-vesicles-as-a-platform-for-vaccine-development
#2
Ezequiel Valguarnera, Mario F Feldman
As we enter into the postantibiotic era, vaccines to prevent bacterial infections previously treatable with antibiotics are urgently needed. Most successful antibacterial vaccines are glycoconjugates, composed of cell surface carbohydrates chemically attached to a carrier protein. Glycoconjugate vaccines provide a safe and consistent strategy against polysaccharide-encapsulated pathogens. The best examples are the conjugate vaccines against Haemophilus influenzae type b, Streptococcus pneumoniae, and Neisseria meningitidis, all based on capsular polysaccharides...
2017: Methods in Enzymology
https://www.readbyqxmd.com/read/28934367/exploring-the-salivary-microbiome-of-children-stratified-by-the-oral-hygiene-index
#3
Izumi Mashima, Citra F Theodorea, Boonyanit Thaweboon, Sroisiri Thaweboon, Frank A Scannapieco, Futoshi Nakazawa
Poor oral hygiene often leads to chronic diseases such as periodontitis and dental caries resulting in substantial economic costs and diminished quality of life in not only adults but also in children. In this study, the salivary microbiome was characterized in a group of children stratified by the Simplified Oral Hygiene Index (OHI-S). Illumina MiSeq high-throughput sequencing based on the 16S rRNA was utilized to analyze 90 salivary samples (24 Good, 31 Moderate and 35 Poor oral hygiene) from a cohort of Thai children...
2017: PloS One
https://www.readbyqxmd.com/read/28931240/influenza-like-illness-incidence-is-not-reduced-by-influenza-vaccination-in-a-cohort-of-older-adults-despite-effectively-reducing-laboratory-confirmed-influenza-virus-infections
#4
Josine van Beek, Reinier H Veenhoven, Jacob P Bruin, Renée A J van Boxtel, Marit M A de Lange, Adam Meijer, Elisabeth A M Sanders, Nynke Y Rots, Willem Luytjes
Background: Data on the relative contribution of influenza virus and other respiratory pathogens to respiratory infections in community-dwelling older adults (≥60 years) are needed. Methods: A prospective observational cohort study was performed in the Netherlands during 2 winters. Nasopharyngeal and oropharyngeal swabs were collected during influenza-like illness (ILI) episodes and from controls. Viruses and bacteria were identified by multiplex ligation-dependent probe amplification assay and conventional bacterial culture...
August 15, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28929964/-investigation-of-bacterial-and-viral-etiology-in-community-acquired-central-nervous-system-infections-with-molecular-methods
#5
Hasip Kahraman, Alper Tünger, Şebnem Şenol, Hörü Gazi, Meltem Avcı, Bahar Örmen, Nesrin Türker, Sabri Atalay, Şükran Köse, Sercan Ulusoy, Meltem Işıkgöz Taşbakan, Oğuz Reşat Sipahi, Tansu Yamazhan, Zeynep Gülay, Sema Alp Çavuş, Hüsnü Pullukçu
In this multicenter prospective cohort study, it was aimed to evaluate the bacterial and viral etiology in community-acquired central nervous system infections by standart bacteriological culture and multiplex polymerase chain reaction (PCR) methods. Patients hospitalized with central nervous system infections between April 2012 and February 2014 were enrolled in the study. Demographic and clinical information of the patients were collected prospectively. Cerebrospinal fluid (CSF) samples of the patients were examined by standart bacteriological culture methods, bacterial multiplex PCR (Seeplex meningitis-B ACE Detection (Streptococcus pneumoniae, Neisseria meningitidis, Haemophilus influenzae, Listeria monocytogenes, Group B streptococci) and viral multiplex PCR (Seeplex meningitis-V1 ACE Detection kits herpes simplex virus-1 (HSV1), herpes simplex virus-2 (HSV2), varicella zoster virus (VZV), cytomegalovirus (CMV), Epstein Barr virus (EBV) and human herpes virus 6 (HHV6)) (Seeplex meningitis-V2 ACE Detection kit (enteroviruses))...
July 2017: Mikrobiyoloji Bülteni
https://www.readbyqxmd.com/read/28929962/-determination-of-in-vitro-susceptibilities-of-brucella-spp-strains-against-11-different-antibacterial-gents-isolated-from-blood-cultures
#6
Recep Keşli, Hüseyin Bilgin, Halim Yılmaz
Brucellosis is a worldwide zoonotic disease and still continuous to be a major public health problem. In this study, it was aimed to identify the Brucella strains to the species level isolated from blood cultures, and to determine the rate of antimicrobial susceptibility against eleven antibacterial agents. A total of 106 Brucella spp. strains were included in the study, which were isolated from blood cultures in University of Health Sciences, Konya Training and Research Hospital, Medical Microbiology Laboratory between January 2011 and June 2013...
July 2017: Mikrobiyoloji Bülteni
https://www.readbyqxmd.com/read/28922613/the-etiology-of-community-acquired-pneumonia-among-children-under-5%C3%A2-years-of-age-in-mainland-china-2001-2015-a-systematic-review
#7
Guijun Ning, Xuxia Wang, Dan Wu, Zundong Yin, Yixing Li, Huaqing Wang, Weizhong Yang
BACKGROUND: The aim of this systematic review was to examine the etiology of community-acquired pneumonia (CAP) among Chinese children younger than 5 years and provide evidence for further cost-effectiveness analyses for vaccine development, diagnostic strategies and empirical treatments. METHODS: The literature review followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses statement. Data were obtained by searching PubMed, Embase, Web-of Science, and the Chinese databases Wanfang Data and China National Knowledge Infrastructure...
September 18, 2017: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/28922566/streptococcus-pneumoniae-and-chronic-endobronchial-infections-in-childhood
#8
Kim M Hare, Amanda J Leach, Heidi C Smith-Vaughan, Anne B Chang, Keith Grimwood
Streptococcus pneumoniae (pneumococcus) is the main cause of bacterial pneumonia worldwide and has been studied extensively in this context. However, its role in chronic endobronchial infections and accompanying lower airway neutrophilic infiltration has received little attention. Severe and recurrent pneumonia are risk factors for chronic suppurative lung disease (CSLD) and bronchiectasis; the latter causes considerable morbidity and, in some populations, premature death in children and adults. Protracted bacterial bronchitis (PBB) is another chronic endobronchial infection associated with substantial morbidity...
September 18, 2017: Pediatric Pulmonology
https://www.readbyqxmd.com/read/28921456/blood-brain-barrier-in-a-haemophilus-influenzae-type-a-in-vitro-infection-role-of-adenosine-receptors-a2a-and-a2b
#9
N Caporarello, M Olivieri, M Cristaldi, M Scalia, M A Toscano, C Genovese, A Addamo, M Salmeri, G Lupo, C D Anfuso
The blood-brain barrier (BBB) is mainly made up of tightly connected microvascular endothelial cells (BMECs), surrounded by pericytes (BMPCs) which regulate BBB tightness by providing soluble factors that control endothelial proliferation. Haemophilus influenzae type a (Hia) is able to reach the BBB, crossing it, thus causing meningitis. In this study, by using an in vitro model of BBB, performed with human BMECs and human BMPCs in co-culture, we demonstrated that, after Hia infection, the number of hBMPCs decreased whereas the number of hBMECs increased in comparison with non-infected cells...
September 18, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/28918379/infanrix-hexa-and-sudden-death-a-review-of-the-periodic-safety-update-reports-submitted-to-the-european-medicines-agency
#10
Jacob Puliyel, C Sathyamala
There have been a number of spontaneous reports of sudden unexpected death soon after the administration of Infanrix hexa (combined diphtheria, tetanus, acellular pertussis, hepatitis B, inactivated poliomyelitis and Haemophilus influenza type B vaccine). The manufacturer, GlaxoSmithKline (GSK), submits confidential periodic safety update reports (PSURs) on Infanrix hexa to the European Medicines Agency (EMA). The latest is the PSUR 19. Each PSUR contains an analysis of observed/expected sudden deaths, which shows that the number of observed deaths soon after immunisation is lower than that expected by chance...
September 5, 2017: Indian Journal of Medical Ethics
https://www.readbyqxmd.com/read/28913912/streptococcus-pneumoniae-colonization-of-the-nasopharynx-is-associated-with-increased-severity-during-respiratory-syncytial-virus-infection-in-young-children
#11
Jaelle C Brealey, Keith J Chappell, Sally Galbraith, Emmanuelle Fantino, Jane Gaydon, Sarah Tozer, Paul R Young, Patrick G Holt, Peter D Sly
BACKGROUND AND OBJECTIVE: Respiratory syncytial virus (RSV) is the most significant cause of acute respiratory infection (ARI) in early life. RSV and other respiratory viruses are known to stimulate substantial outgrowth of potentially pathogenic bacteria in the upper airways of young children. However, the clinical significance of interactions between viruses and bacteria is currently unclear. The present study aimed to clarify the effect of viral and bacterial co-detections on disease severity during paediatric ARI...
September 15, 2017: Respirology: Official Journal of the Asian Pacific Society of Respirology
https://www.readbyqxmd.com/read/28903749/modelling-the-effects-of-booster-dose-vaccination-schedules-and-recommendations-for-public-health-immunization-programs-the-case-of-haemophilus-influenzae-serotype-b
#12
Nadia A Charania, Seyed M Moghadas
BACKGROUND: Haemophilus influenzae serotype b (Hib) has yet to be eliminated despite the implementation of routine infant immunization programs. There is no consensus regarding the number of primary vaccine doses and an optimal schedule for the booster dose. We sought to evaluate the effect of a booster dose after receiving the primary series on the long-term disease incidence. METHODS: A stochastic model of Hib transmission dynamics was constructed to compare the long-term impact of a booster vaccination and different booster schedules after receiving the primary series on the incidence of carriage and symptomatic disease...
September 13, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28899468/-pathogen-distribution-and-bacterial-resistance-in-children-with-severe-community-acquired-pneumonia
#13
Yun-Yun Lu, Rong Luo, Zhou Fu
OBJECTIVE: To investigate the distribution of pathogens and bacterial resistance in children with severe community-acquired pneumonia (CAP). METHODS: A total of 522 children with severe CAP who were hospitalized in 2016 were enrolled as study subjects. According to their age, they were divided into infant group (402 infants aged 28 days to 1 year), young children group (73 children aged 1 to 3 years), preschool children group (35 children aged 3 to 6 years), and school-aged children group (12 children aged ≥6 years)...
September 2017: Zhongguo Dang Dai Er Ke za Zhi, Chinese Journal of Contemporary Pediatrics
https://www.readbyqxmd.com/read/28893741/prevention-and-assessment-of-infectious-diseases-among-children-and-adult-migrants-arriving-to-the-european-union-european-economic-association-a-protocol-for-a-suite-of-systematic-reviews-for-public-health-and-health-systems
#14
Kevin Pottie, Alain D Mayhew, Rachael L Morton, Christina Greenaway, Elie A Akl, Prinon Rahman, Dominik Zenner, Manish Pareek, Peter Tugwell, Vivian Welch, Joerg Meerpohl, Pablo Alonso-Coello, Charles Hui, Beverley-Ann Biggs, Ana Requena-Méndez, Eric Agbata, Teymur Noori, Holger J Schünemann
INTRODUCTION: The European Centre for Disease Prevention and Control is developing evidence-based guidance for voluntary screening, treatment and vaccine prevention of infectious diseases for newly arriving migrants to the European Union/European Economic Area. The objective of this systematic review protocol is to guide the identification, appraisal and synthesis of the best available evidence on prevention and assessment of the following priority infectious diseases: tuberculosis, HIV, hepatitis B, hepatitis C, measles, mumps, rubella, diphtheria, tetanus, pertussis, poliomyelitis (polio), Haemophilus influenza disease, strongyloidiasis and schistosomiasis...
September 11, 2017: BMJ Open
https://www.readbyqxmd.com/read/28893183/antimicrobial-resistance-in-africa-a-systematic-review
#15
Birkneh Tilahun Tadesse, Elizabeth A Ashley, Stefano Ongarello, Joshua Havumaki, Miranga Wijegoonewardena, Iveth J González, Sabine Dittrich
BACKGROUND: Antimicrobial resistance (AMR) is widely acknowledged as a global problem, yet in many parts of the world its magnitude is still not well understood. This review, using a public health focused approach, aimed to understand and describe the current status of AMR in Africa in relation to common causes of infections and drugs recommended in WHO treatment guidelines. METHODS: PubMed, EMBASE and other relevant databases were searched for recent articles (2013-2016) in accordance with the PRISMA guidelines...
September 11, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28890509/proposed-pharmacokinetic-pharmacodynamic-breakpoint-of-garenoxacin-and-other-quinolones
#16
Yuka Yamagishi, Tatsuya Shibata, Satoshi Nakagawa, Nobuhiko Nomura, Junichi Mitsuyama, Hiroshige Mikamo
The pharmacokinetic-pharmacodynamic (PK-PD) breakpoints (BPs) of garenoxacin (GRNX) and other oral quinolones were calculated using the Monte Carlo simulation (MCS) based on the distribution of changes in their plasma concentrations. PK-PD BPs of 400 mg once a day (QD) of GRNX for the free area under the curve/minimum inhibitory concentration (fAUC/MIC) for 30 of Streptococcus pneumoniae and 100 of Gram-negative bacteria: (G (-)) were 0.5 and 0.125 μg/mL, respectively. PK-PD BPs of other quinolones for S. pneumoniae/G(-) were 1/0...
September 11, 2017: Japanese Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28890441/haemophilus-influenzae-biofilms-in-primary-ciliary-dyskinesia-a-moving-story
#17
EDITORIAL
Amelia Shoemark
No abstract text is available yet for this article.
September 2017: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/28890436/primary-ciliary-dyskinesia-ciliated-airway%C3%A2-cells-show-increased-susceptibility-to-haemophilus-influenzae-biofilm-formation
#18
Woolf T Walker, Claire L Jackson, Raymond N Allan, Samuel A Collins, Michael J Kelso, Ardeshir Rineh, Nageshwar R Yepuri, Ben Nicholas, Laurie Lau, David Johnston, Peter Lackie, Saul N Faust, Jane S A Lucas, Luanne Hall-Stoodley
Non-typeable Haemophilus influenzae (NTHi) is the most common pathogen in primary ciliary dyskinesia (PCD) patients. We hypothesised that abnormal ciliary motility and low airway nitric oxide (NO) levels on airway epithelial cells from PCD patients might be permissive for NTHi colonisation and biofilm development.We used a primary epithelial cell co-culture model to investigate NTHi infection. Primary airway epithelial cells from PCD and non-PCD patients were differentiated to ciliation using an air-liquid interface culture and then co-cultured with NTHi...
September 2017: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/28889986/-haemophilus-quentini-in-the-urethra-of-men-complaining-of-urethritis-symptoms
#19
Kengo Horie, Shin Ito, Kyoko Hatazaki, Mitsuru Yasuda, Masahiro Nakano, Kyojiro Kawakami, Yasunori Fujita, Masafumi Ito, Takayuki Ezaki, Takashi Deguchi
We isolated a cryptic genospecies of Haemophilus influenzae referred to as 'Haemophilus quentini' in the urethra of 3 men complaining of urethritis symptoms. H. influenzae strains, which had been isolated from the urethra in 77 of 1518 men complaining of urethritis symptoms, identified by the conventional test, and stored, were re-cultured for this study. Sixty-seven strains surviving storage were screened by a PCR-based assay specific for the cryptic genital Haemophilus genospecies. Three strains (HI09003, HI11006, and HI14016) were screened by PCR and identified as 'H...
September 7, 2017: Journal of Infection and Chemotherapy: Official Journal of the Japan Society of Chemotherapy
https://www.readbyqxmd.com/read/28887305/structural-analyses-of-the-haemophilus-influenzae-peptidoglycan-synthase-activator-lpoa-suggest-multiple-conformations-in-solution
#20
Karthik Sathiyamoorthy, J Vijayalakshmi, Bhramara Tirupati, Lixin Fan, Mark A Saper
In many Gram-negative bacteria, the peptidoglycan synthase PBP1A requires the outer membrane lipoprotein LpoA for constructing a functional peptidoglycan required for bacterial viability. Previously, we have shown that the C-terminal domain of Haemophilus influenzae LpoA (HiLpoA) has a highly conserved, putative substrate-binding cleft between two α/β lobes. Here, we report a 2.0-Å-resolution crystal structure of the HiLpoA N-terminal domain. Two subdomains contain tetratricopeptide-like motifs that form a concave groove, but their relative orientation differs by ~45° from that observed in an NMR structure of the Escherichia coli LpoA N domain...
September 8, 2017: Journal of Biological Chemistry
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