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https://www.readbyqxmd.com/read/27922235/high-frequency-of-pertussis-in-older-children-and-adolescents-with-prolonged-cough-in-turkey
#1
Aslı Aslan, Zafer Kurugöl, Şöhret Aydemir, Derya Gürsel, Güldane Koturoğlu
This study aimed to determine the frequency of B. pertussis infection among Turkish children with prolonged cough. Nasopharyngeal specimens were collected from 7-18 year old children, presenting with prolonged cough of two to four weeks' duration. Specimens were examined for B. pertussis by PCR. Of 101 children with prolonged cough, 20 (19.8%) had a positive PCR testing for B. pertussis. Children who were vaccinated ≥5 years previously had a 6.13-fold higher risk of PCR-confirmed pertussis than those who were vaccinated < 5 years before...
2016: Turkish Journal of Pediatrics
https://www.readbyqxmd.com/read/27905535/bordetella-pertussis-outer-membrane-vesicle-vaccine-confers-equal-efficacy-in-mice-with-milder-inflammatory-responses-compared-to-a-whole-cell-vaccine
#2
René H M Raeven, Jolanda Brummelman, Jeroen L A Pennings, Larissa van der Maas, Wichard Tilstra, Kina Helm, Elly van Riet, Wim Jiskoot, Cécile A C M van Els, Wanda G H Han, Gideon F A Kersten, Bernard Metz
The demand for improved pertussis vaccines is urgent due to the resurgence of whooping cough. A deeper understanding of the mode of action of pertussis vaccines is required to achieve this improvement. The vaccine-induced effects of a candidate outer membrane vesicle vaccine (omvPV) and a classical protective but reactogenic whole cell vaccine (wPV) were comprehensively compared in mice. The comparison revealed essential qualitative and quantitative differences with respect to immunogenicity and adverse effects for these vaccines...
December 1, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27869387/-trends-in-pertussis-mortality-and-morbidity-in-colombia-2002-2012
#3
Doris Cardona, María Osley Garzón, Mateo Calle, Maite Catalina Agudelo, Ángela Segura
Whooping cough is a public health problem that mainly affects children under one year of age with highly lethal outcomes. It is a re-emerging disease, which is preventable by immunization. Objective: To analyze mortality and morbidity trends of whooping cough in Colombia between 2002 and 2012. Materials and methods: We conducted a quantitative descriptive study of deaths by pertussis between 2002 and 2012 using data from death certificates registered by the Departamento Administrativo Nacional de Estadística, and cases reported to the Sistema Nacional de Vigilancia en Salud Pública, 2005-2012...
September 1, 2016: Biomédica: Revista del Instituto Nacional de Salud
https://www.readbyqxmd.com/read/27853066/concentrations-of-immunoglobulin-g-antibodies-against-pertussis-toxin-does-not-decrease-over-a-long-period-of-time-in-japan
#4
Yumi Sakakibara, Yoshio Ohtani, Torahiko Jinta, Toshihide Fujie, Yasunari Miyazaki, Naohiko Inase, Ryoichi Saito, Miho Akaza, Tetsuo Sasano, Yuki Sumi
Objective Adult patients with pertussis rarely show typical symptoms, such as paroxysmal coughing, inspiratory "whoop", or post-tussive vomiting. While a culture is regarded as the gold standard for diagnosis, the sensitivity is very low. Therefore, the diagnosis of pertussis in adults in clinical practice is mostly based on single-sample serology using an enzyme-linked immunosorbent assay (ELISA) with the pertussis toxin antigen. Various cut-off values for the anti-pertussis toxin IgG (PT-IgG) have been proposed...
2016: Internal Medicine
https://www.readbyqxmd.com/read/27851884/pertussis-in-poland-in-2014
#5
Iwona Paradowska-Stankiewicz, Jolanta Rudowska
INTRODUCTION: In Poland, they are still recorded high number of cases whooping cough - five-year median for 2005-2009 and 2010-2014 are similar and amount to 5.2 and 5.5 per 100 000 population. The trend of the incidence of pertussis in a high percentage of adults that was observed in years between 2009-2011 (the results of the National Research Epidemiology of Pertussis), in subsequent years, ie. 2012-2014 was halted. Still the most effective strategy to prevent illness is the vaccination according to the current vaccination calendar...
2016: Przegla̧d Epidemiologiczny
https://www.readbyqxmd.com/read/27849178/modulation-of-pertussis-and-adenylate-cyclase-toxins-by-sigma-factor-rpoe-in-bordetella-pertussis
#6
Mariette Barbier, Dylan Boehm, Emel Sen-Kiliç, Claire Bonnin, Theo Pinheiro, Casey Hoffman, Mary Gray, Erik Hewlett, F Heath Damron
Bordetella pertussis is a human pathogen that can infect the respiratory tract and cause the disease known as whooping cough. B. pertussis uses pertussis toxin (PT) and adenylate cyclase toxin (ACT) to kill and modulate host cells to allow the pathogen to survive and persist. B. pertussis encodes many uncharacterized transcription factors and very little is known about their functions. RpoE is a sigma factor which in other bacteria, responds to oxidative, heat, and other environmental stresses. RseA is a negative regulator of RpoE that sequesters the sigma factor to regulate gene expression based on conditions...
November 14, 2016: Infection and Immunity
https://www.readbyqxmd.com/read/27795930/a-plant-from-the-altiplano-of-northern-chile-senecio-nutans-inhibits-the-vibrio-cholerae-pathogen
#7
Adrian Paredes, Yanett Leyton, Carlos Riquelme, Glauco Morales
BACKGROUND: In the altiplano of Northern Chile the plant Senecio nutans is habitually used as an infusion to relieve the effects of altitude sickness (locally known as "puna"). It is also used to alleviate the bronchitis, whooping cough, asthma, stomachache, tiredness and fever. The extreme conditions under which these plant grow and scientific data that shows the inhibiting potential of the essential oils of plants of the genus Senecio represents great potential in the study of their application to control pathogens like Vibrio Cholera...
2016: SpringerPlus
https://www.readbyqxmd.com/read/27795250/complete-genome-sequences-of-four-different-bordetella-sp-isolates-causing-human-respiratory-infections
#8
Michael R Weigand, Yanhui Peng, Vladimir Loparev, Dhwani Batra, Katherine E Bowden, Pamela K Cassiday, Jamie K Davis, Taccara Johnson, Phalasy Juieng, Christine E Miner, Lori Rowe, Mili Sheth, M Lucia Tondella, Margaret M Williams
Species of the genus Bordetella associate with various animal hosts, frequently causing respiratory disease. Bordetella pertussis is the primary agent of whooping cough and other Bordetella species can cause similar cough illness. Here, we report four complete genome sequences from isolates of different Bordetella species recovered from human respiratory infections.
October 6, 2016: Genome Announcements
https://www.readbyqxmd.com/read/27779831/infectious-diseases-in-poland-in-2014
#9
Małgorzata Sadkowska-Todys, Andrzej Zieliński, Mirosław P Czarkowski
PURPOSE of the STUDY: The aim of the study is to assess epidemiological situation of infectious and parasitic diseases in Poland in 2014, and an indication of the potential health risks from communicable diseases occurring in other areas of the globe. MATERIAL AND METHODS: This paper is a summary of the analysis and evaluation of the results of epidemiological surveillance of infectious diseases in Poland in 2014, and those elements of European and global epidemiological background, which in this period had an impact on the epidemiological situation in Poland or constituted a threat...
2016: Przegla̧d Epidemiologiczny
https://www.readbyqxmd.com/read/27775243/design-and-synthesis-of-fluorescent-acyclic-nucleoside-phosphonates-as-potent-inhibitors-of-bacterial-adenylate-cyclases
#10
Petra Břehová, Markéta Šmídková, Jan Skácel, Martin Dračínský, Helena Mertlíková-Kaiserová, Monica P Soto Velasquez, Val J Watts, Zlatko Janeba
Bordetella pertussis adenylate cyclase toxin (ACT) and Bacillus anthracis edema factor (EF) are key virulence factors with adenylate cyclase (AC) activity that substantially contribute to the pathogenesis of whooping cough and anthrax, respectively. There is an urgent need to develop potent and selective inhibitors of bacterial ACs with prospects for the development of potential antibacterial therapeutics and to study their molecular interactions with the target enzymes. Novel fluorescent 5-chloroanthraniloyl-substituted acyclic nucleoside phosphonates (Cl-ANT-ANPs) were designed and synthesized in the form of their diphosphates (Cl-ANT-ANPpp) as competitive ACT and EF inhibitors with sub-micromolar potency (IC50 values: 11-622 nm)...
November 21, 2016: ChemMedChem
https://www.readbyqxmd.com/read/27761933/immunogenicity-and-protective-efficacy-of-recombinant-iron-superoxide-dismutase-protein-from-bordetella-pertussis-in-mice-models
#11
Çiğdem Yılmaz, Aycan Apak, Erkan Özcengiz, Gülay Özcengiz
Whooping cough (pertussis) is a highly contagious respiratory infection caused by Bordetella pertussis. Although availability of effective pertussis vaccines reportedly decreases the incidence of the disease, B. pertussis circulation in populations has not been eliminated. Thus, it is necessary to find new protein candidates with greater immune protective capacities than the currently available acellular pertussis vaccines. In this study, iron superoxide dismutase (FeSOD) gene (sodB) was cloned, expressed in Escherichia coli and recombinant FeSOD protein thence purified...
November 2016: Microbiology and Immunology
https://www.readbyqxmd.com/read/27754355/pertussis-toxin-exploits-host-cell-signaling-pathways-induced-by-meningitis-causing-e-coli-k1-rs218-and-enhances-adherence-of-monocytic-thp-1-cells-to-human-cerebral-endothelial-cells
#12
Laura Julia Starost, Sascha Karassek, Yasuteru Sano, Takashi Kanda, Kwang Sik Kim, Ulrich Dobrindt, Christian Rüter, Marcus Alexander Schmidt
Pertussis toxin (PTx), the major virulence factor of the whooping cough-causing bacterial pathogen Bordetella pertussis, permeabilizes the blood-brain barrier (BBB) in vitro and in vivo. Breaking barriers might promote translocation of meningitis-causing bacteria across the BBB, thereby facilitating infection. PTx activates several host cell signaling pathways exploited by the neonatal meningitis-causing Escherichia coli K1-RS218 for invasion and translocation across the BBB. Here, we investigated whether PTx and E...
October 13, 2016: Toxins
https://www.readbyqxmd.com/read/27731909/bordetella-adenylate-cyclase-toxin-interacts-with-filamentous-haemagglutinin-to-inhibit-biofilm-formation-in-vitro
#13
Casandra Hoffman, Joshua Eby, Mary Gray, F Heath Damron, Jeffrey Melvin, Peggy Cotter, Erik Hewlett
Bordetella pertussis, the causative agent of whooping cough, secretes and releases adenylate cyclase toxin (ACT), which is a protein bacterial toxin that targets host cells and disarms immune defenses. ACT binds filamentous haemagglutinin (FHA), a surface-displayed adhesin, and until now, the consequences of this interaction were unknown. A B. bronchiseptica mutant lacking ACT produced more biofilm than the parental strain; leading Irie et al. to propose the ACT-FHA interaction could be responsible for biofilm inhibition...
October 12, 2016: Molecular Microbiology
https://www.readbyqxmd.com/read/27729960/old-disease-and-new-challenges-major-obstacles-of-current-strategies-in-the-prevention-of-pertussis
#14
Iraj Sedighi, Abdollah Karimi, Ali Amanati
CONTEXT: Universal immunization against Bordetella pertussis has partially controlled the burden of the disease and its transmission. However, according to recent data, the epidemiology of this vaccine-preventable disease has changed. Now, younger infants, adolescents, and adults are at greater risk of infection. This article has studied the interaction between the various factors involved in the changing epidemiology of pertussis and the major obstacles faced by the current strategies in its prevention...
August 2016: Iranian Journal of Pediatrics
https://www.readbyqxmd.com/read/27692981/the-pertussis-hypothesis-bordetella-pertussis-colonization-in-the-pathogenesis-of-alzheimer-s-disease
#15
Keith Rubin, Steven Glazer
While a number of endogenous risk factors including age and genetics are established for Alzheimer's disease (AD), identification of acquired, potentially preventable or treatable causes, remains limited. In this paper, we review three epidemiologic case studies and present extensive biologic, immunologic and anatomic evidence to support a novel hypothesis that Bordetella pertussis (BP), the bacterium better known to cause whooping cough, is an important potential cause of AD. Cross-cultural documentation of nasopharyngeal subclinical BP colonization reflecting BP-specific mucosal immunodeficiency, proximate anatomy of intranasal mucosal surfaces to central nervous system (CNS) olfactory pathways, and mechanisms by which BP and BP toxin account for all hallmark pathology of AD are reviewed, substantiating biologic plausibility...
September 28, 2016: Immunobiology
https://www.readbyqxmd.com/read/27686875/understanding-uptake-of-immunisations-in-travelling-and-gypsy-communities-uniting-a-qualitative-interview-study
#16
Cath Jackson, Lisa Dyson, Helen Bedford, Francine M Cheater, Louise Condon, Annie Crocker, Carol Emslie, Lana Ireland, Philippa Kemsley, Susan Kerr, Helen J Lewis, Julie Mytton, Karen Overend, Sarah Redsell, Zoe Richardson, Christine Shepherd, Lesley Smith
BACKGROUND: Gypsies, Travellers and Roma (referred to as Travellers) are less likely to access health services, including immunisation. To improve immunisation rates, we need to understand what helps and hinders individuals in these communities in taking up immunisations. AIMS: (1) Investigate the barriers to and facilitators of acceptability and uptake of immunisations among six Traveller communities across four UK cities; and (2) identify possible interventions to increase uptake of immunisations in these Traveller communities that could be tested in a subsequent feasibility study...
September 2016: Health Technology Assessment: HTA
https://www.readbyqxmd.com/read/27679704/study-on-toxicity-reduction-and-potency-induction-in-whole-cell-pertussis-vaccine-by-developing-a-new-optimal-inactivation-condition-processed-on-bordetella-pertussis
#17
Naser Mohammadpour Dounighi, Mehdi Razzaghi-Abyane, Mojtaba Nofeli, Hossein Zolfagharian, Fereshteh Shahcheraghi
BACKGROUND: Whooping cough is caused by Bordetella pertussis, and it remains a public health concern. Whole-cell pertussis vaccines have been commonly employed for expanded immunization. There is no doubt of the efficacy of whole cell pertussis vaccine, but it is necessary to improve the vaccine to decrease its toxicity. OBJECTIVES: In this study, an inactivation process of dealing with pertussis bacteria is optimized in order to decrease the bacteria content in human doses of vaccines and reduce the vaccine's toxicity...
July 2016: Jundishapur Journal of Microbiology
https://www.readbyqxmd.com/read/27669900/biofilm-forming-potential-and-antimicrobial-susceptibility-of-newly-emerged-western-australian-bordetella-pertussis-clinical-isolates
#18
Dorji Dorji, Ross M Graham, Peter Richmond, Anthony Keil, Trilochan K Mukkur
Whooping cough caused by Bordetella pertussis is increasing in several countries despite high vaccine coverage. One potential reason for the resurgence is the emergence of genetic variants of the bacterium. Biofilm formation has recently been associated with the pathogenesis of B. pertussis. Biofilm formation of 21 Western Australian B. pertussis clinical isolates was investigated. All isolates formed thicker biofilms than the reference vaccine strain Tohama I while retaining susceptibility to ampicillin, erythromycin, azithromycin and streptomycin...
October 2016: Biofouling
https://www.readbyqxmd.com/read/27635001/complete-genome-sequences-of-bordetella-pertussis-vaccine-reference-strains-134-and-10536
#19
Michael R Weigand, Yanhui Peng, Vladimir Loparev, Dhwani Batra, Mark Burroughs, Taccara Johnson, Phalasy Juieng, Lori Rowe, M Lucia Tondella, Margaret M Williams
Vaccine formulations and vaccination programs against whooping cough (pertussis) vary worldwide. Here, we report the complete genome sequences of two divergent Bordetella pertussis reference strains used in the production of pertussis vaccines.
2016: Genome Announcements
https://www.readbyqxmd.com/read/27634997/complete-genome-sequence-of-bordetella-pertussis-strain-va-190-isolated-from-a-vaccinated-10-year-old-patient-with-whooping-cough
#20
Joshua C Eby, Lauren Turner, Bryan Nguyen, June Kang, Carly Neville, Louise Temple
The number of cases of pertussis has increased in the United States despite vaccination. We present the genome of an isolate of Bordetella pertussis from a vaccinated patient from Virginia. The genome was sequenced by long-read methodology and compared to that of a clinical isolate used for laboratory studies, D420.
2016: Genome Announcements
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