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https://www.readbyqxmd.com/read/28039663/whooping-cough-in-adults-a-series-of-severe-cases
#1
Katarzyna Zycinska, M Cieplak, M Chmielewska, A Nitsch-Osuch, A Klaczkow, M Hadzik-Blaszczyk, Z Kur, K A Wardyn
Bordetella pertussis is a gram-negative aerobic coccobacillus causing contagious respiratory tract disease called whooping cough. The virulence factors consist of pertussis toxin, filamentous hemagglutinin, fimbriae, lipooligosaccharide, and adenylate cyclase toxin. The disease causes a worldwide threat to public health despite a high vaccination coverage. The course of whooping cough in adults is frequently atypical, causing difficulty in diagnosis. In this report we present five patients hospitalized with Bordetella pertussis infection manifesting atypical and severe symptoms...
December 31, 2016: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28039302/camp-signaling-of-adenylate-cyclase-toxin-blocks-the-oxidative-burst-of-neutrophils-through-epac-mediated-inhibition-of-phospholipase-c-activity
#2
Ondrej Cerny, Karen E Anderson, Len R Stephens, Phillip T Hawkins, Peter Sebo
The adenylate cyclase toxin-hemolysin (CyaA) plays a key role in immune evasion and virulence of the whooping cough agent Bordetella pertussis. CyaA penetrates the complement receptor 3-expressing phagocytes and ablates their bactericidal capacities by catalyzing unregulated conversion of cytosolic ATP to the key second messenger molecule cAMP. We show that signaling of CyaA-generated cAMP blocks the oxidative burst capacity of neutrophils by two converging mechanisms. One involves cAMP/protein kinase A-mediated activation of the Src homology region 2 domain-containing phosphatase-1 (SHP-1) and limits the activation of MAPK ERK and p38 that are required for assembly of the NADPH oxidase complex...
December 30, 2016: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/27983896/how-often-people-google-for-vaccination-qualitative-and-quantitative-insights-from-a-systematic-search-of-the-web-based-activities-using-google-trends
#3
Nicola Luigi Bragazzi, Ilaria Barberis, Roberto Rosselli, Vincenza Gianfredi, Daniele Nucci, Massimo Moretti, Tania Salvatori, Gianfranco Martucci, Mariano Martini
Nowadays, more and more people surf the Internet seeking health-related information. Information and communication technologies (ICTs) can represent an important opportunities in the field of Public Health and vaccinology. The aim of our current research was to investigate a) how often people search the Internet for vaccination-related information, b) if this search is spontaneous or induced by media, and c) which kind of information is in particular searched. We used Google Trends (GT) for monitoring the interest for preventable infections and related vaccines...
December 16, 2016: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/27974800/near-atomic-resolution-cryo-em-analysis-of-the-salmonella-t3s-injectisome-basal-body
#4
L J Worrall, C Hong, M Vuckovic, W Deng, J R C Bergeron, D D Majewski, R K Huang, T Spreter, B B Finlay, Z Yu, N C J Strynadka
The type III secretion (T3S) injectisome is a specialized protein nanomachine that is critical for the pathogenicity of many Gram-negative bacteria, including purveyors of plague, typhoid fever, whooping cough, sexually transmitted infections and major nosocomial infections. This syringe-shaped 3.5-MDa macromolecular assembly spans both bacterial membranes and that of the infected host cell. The internal channel formed by the injectisome allows for the direct delivery of partially unfolded virulence effectors into the host cytoplasm...
December 14, 2016: Nature
https://www.readbyqxmd.com/read/27929206/acute-bronchitis
#5
Scott Kinkade, Natalie A Long
Cough is the most common illness-related reason for ambulatory care visits in the United States. Acute bronchitis is a clinical diagnosis characterized by cough due to acute inflammation of the trachea and large airways without evidence of pneumonia. Pneumonia should be suspected in patients with tachypnea, tachycardia, dyspnea, or lung findings suggestive of pneumonia, and radiography is warranted. Pertussis should be suspected in patients with cough persisting for more than two weeks that is accompanied by symptoms such as paroxysmal cough, whooping cough, and post-tussive emesis, or recent pertussis exposure...
October 1, 2016: American Family Physician
https://www.readbyqxmd.com/read/27922235/high-frequency-of-pertussis-in-older-children-and-adolescents-with-prolonged-cough-in-turkey
#6
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
#7
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
#8
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
#9
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
#10
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
#11
Mariette Barbier, Dylan T Boehm, Emel Sen-Kilic, 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...
January 2017: Infection and Immunity
https://www.readbyqxmd.com/read/27795930/a-plant-from-the-altiplano-of-northern-chile-senecio-nutans-inhibits-the-vibrio-cholerae-pathogen
#12
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
#13
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
#14
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
#15
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
#16
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
#17
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
#18
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...
January 2017: Molecular Microbiology
https://www.readbyqxmd.com/read/27729960/old-disease-and-new-challenges-major-obstacles-of-current-strategies-in-the-prevention-of-pertussis
#19
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
#20
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...
February 2017: Immunobiology
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