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Brenda Anna Kwambana-Adams, Franklin Asiedu-Bekoe, Badu Sarkodie, Osei Kuffour Afreh, George Khumalo Kuma, Godfred Owusu-Okyere, Ebenezer Foster-Nyarko, Sally-Ann Ohene, Charles Okot, Archibald Kwame Worwui, Catherine Okoi, Madikay Senghore, Jacob Kweku Otu, Chinelo Ebruke, Richard Bannerman, Kwame Amponsa-Achiano, David Opare, Gemma Kay, Timothy Letsa, Owen Kaluwa, Ebenezer Appiah-Denkyira, Victor Bampoe, Syed M A Zaman, Mark J Pallen, Umberto D'Alessandro, Jason M Mwenda, Martin Antonio
BACKGROUND: An outbreak of pneumococcal meningitis among non-infant children and adults occurred in the Brong-Ahafo region of Ghana between December 2015 and April 2016 despite the recent nationwide implementation of a vaccination programme for infants with the 13-valent pneumococcal conjugate vaccine (PCV13). METHODS: Cerebrospinal fluid (CSF) specimens were collected from patients with suspected meningitis in the Brong-Ahafo region. CSF specimens were subjected to Gram staining, culture and rapid antigen testing...
October 18, 2016: BMC Infectious Diseases
Martin Lappann, Andreas Otto, Madita Brauer, Dörte Becher, Ulrich Vogel, Kay Johswich
Neisseria meningitidis, the meningococcus, bears the potential of life-threatening invasive diseases, but it usually colonizes the nasopharynx without causing any symptoms. Within the nasopharynx, Neisseria meningitidis must face temperature changes depending on the ambient air temperature. Indeed, the nasopharyngeal temperature can be substantially lower than 37°C, the temperature commonly used in experimental settings. Here, we compared meningococcal biofilm formation, autoaggregation and cellular adherence between 32°C and 37°C and found a clear increase in all these phenotypes at 32°C, suggestive for a stronger in vivo colonization capability at this temperature...
September 26, 2016: Infection and Immunity
Giacomo Pongiglione, Alessandro Possidoni, Umberto di Luzio Paparatti, Anna Maria Costanzo, Giuliana Gualberti, Marco Bonvicini, Alessandro Rimini, Gabriella Agnoletti, Maria Pia Calabrò, Marco Pozzi, Roberto Tumbarello, Patrizia Salice, Patrizio Fiorini, Maria Giovanna Russo, Ornella Milanesi
Children affected by hemodynamically significant congenital heart disease (HSCHD) experience severe respiratory complications that can increase the frequency of hospitalizations. The aim of the SINERGY study was to describe the incidence of respiratory diseases and to collect information on active and passive immunoprophylaxis in the first 2 years of life. In this retrospective, multicenter, and epidemiologic study, children with HSCHD were enrolled across 11 Italian sites. Children born between December 31, 2007, and December 31, 2012, were observed during their first 2 years of life...
August 29, 2016: Pediatric Cardiology
Edmund Loh, Hayley Lavender, Felicia Tan, Alexander Tracy, Christoph M Tang
During colonisation of the upper respiratory tract, bacteria are exposed to gradients of temperatures. Neisseria meningitidis is often present in the nasopharynx of healthy individuals, yet can occasionally cause severe disseminated disease. The meningococcus can evade the human complement system using a range of strategies that include recruitment of the negative complement regulator, factor H (CFH) via factor H binding protein (fHbp). We have shown previously that fHbp levels are influenced by the ambient temperature, with more fHbp produced at higher temperatures (i...
August 2016: PLoS Pathogens
Carina Brehony, Charlene M C Rodrigues, Ray Borrow, Andrew Smith, Robert Cunney, E Richard Moxon, Martin C J Maiden
Serogroup B is the only major disease-associated capsular group of Neisseria meningitidis for which no protein-polysaccharide conjugate vaccine is available. This has led to the development of multi-component protein-based vaccines that target serogroup B invasive meningococcal disease (IMD), including Bexsero®, which was implemented for UK infants in 2015, and Trumenba®. Given the diversity of meningococcal protein antigens, post-implementation surveillance of IMD isolates, including characterisation of vaccine antigens, is essential for assessing the effectiveness of such vaccines...
September 7, 2016: Vaccine
David J Weber, William A Rutala
Health care personnel are commonly exposed to infectious agents via sharp injuries (eg, human immunodeficiency virus, hepatitis B virus, and hepatitis C virus), direct patient care (eg, pertussis and meningococcus), and the contaminated environment (eg, Clostridium difficile). An effective occupational program is a key aspect of preventing acquisition of an infection by offering the following: (1) education of health care personnel regarding proper handling of sharps, early identification and isolation of potentially infectious patients, and hand hygiene; (2) assuring immunity to vaccine-preventable diseases; and, (3) immediate availability of a medical evaluation after a nonprotected exposure to an infectious disease...
September 2016: Infectious Disease Clinics of North America
Maria Domina, Veronica Lanza Cariccio, Salvatore Benfatto, Mario Venza, Isabella Venza, Danilo Donnarumma, Erika Bartolini, Erica Borgogni, Marco Bruttini, Laura Santini, Angelina Midiri, Roberta Galbo, Letizia Romeo, Francesco Patanè, Carmelo Biondo, Nathalie Norais, Vega Masignani, Giuseppe Teti, Franco Felici, Concetta Beninati
We explore here the potential of a newly described technology, which is named PROFILER and is based on next generation sequencing of gene-specific lambda phage-displayed libraries, to rapidly and accurately map monoclonal antibody (mAb) epitopes. For this purpose, we used a novel mAb (designated 31E10/E7) directed against Neisserial Heparin-Binding Antigen (NHBA), a component of the anti-group B meningococcus Bexsero® vaccine. An NHBA phage-displayed library was affinity-selected with mAb 31E10/E7, followed by massive sequencing of the inserts present in antibody-selected phage pools...
2016: PloS One
O V Kotelnikova, A A Zinchenko, A A Vikhrov, A P Alliluev, O V Serova, E A Gordeeva, L S Zhigis, V S Zueva, O A Razgulyaeva, T D Melikhova, E A Nokel, E Yu Drozhzhina, L D Rumsh
Using the genome sequence of IgA1 protease of N. meningitidis of serogroup B, four recombinant proteins of different structure and molecular weight were constructed. These proteins were equal in inducing the formation of specific antibodies to IgA1 protease and had protective properties against meningococci. In the sera of immunized mice, anti-IgA1 protease antibodies were detected by whole-cell ELISA, which indicated the presence of IgA1 protease on the surface of these bacteria. We hypothesized that the protective properties of IgA1 protease-based antigens and IgA1 protease analogs could be realized not only via impairment of bacterium adhesion to the mucosa, but also via suppression of this pathogen in the organism...
July 2016: Bulletin of Experimental Biology and Medicine
Elena Capel, Aldert L Zomer, Thomas Nussbaumer, Christine Bole, Brigitte Izac, Eric Frapy, Julie Meyer, Haniaa Bouzinba-Ségard, Emmanuelle Bille, Anne Jamet, Anne Cavau, Franck Letourneur, Sandrine Bourdoulous, Thomas Rattei, Xavier Nassif, Mathieu Coureuil
UNLABELLED: Neisseria meningitidis is a leading cause of bacterial meningitis and septicemia, affecting infants and adults worldwide. N. meningitidis is also a common inhabitant of the human nasopharynx and, as such, is highly adapted to its niche. During bacteremia, N. meningitidis gains access to the blood compartment, where it adheres to endothelial cells of blood vessels and causes dramatic vascular damage. Colonization of the nasopharyngeal niche and communication with the different human cell types is a major issue of the N...
2016: MBio
L N Mazankova, O A Milovanova, D A Moiseenkova, I A Soldatova, E P Mikhalinova
AIM: To improve clinical/laboratory diagnosis of bacterial meningitis (BM) in children. MATERIAL AND METHODS: Fifty-seven patients, aged from 4 months to 12 years, with BM were examined. Bacteriological study of the mucus from the nasopharynx, sterility tests of blood and cerebrospinal fluid (CNF), clinical and biochemical tests, serological study of paired samples of plasma - indirect hemagglutination test, latex agglutination assay, immunological study of plasma and CNF with the determination of interferon -α, -β and -γ, interferon procalcitonin and neopterin with ELISA were performed at admission and after CNF remediation...
2016: Zhurnal Nevrologii i Psikhiatrii Imeni S.S. Korsakova
Luc Martinez, Béatrice Tugaut, François Raineri, Benoit Arnould, Didier Seyler, Pascale Arnould, Khadra Benmedjahed, Guillaume Coindard, François Denis, Jean-Luc Gallais, Didier Duhot
OBJECTIVES: Vaccination is an effective way to reduce morbidity and mortality related to infectious diseases. In France, primary care physicians are the main administrators of vaccines. Our objective was to conduct an exploratory qualitative study with primary care physicians to identify determinants of their commitment to vaccination. METHODS: A qualitative research study was conducted with 36 primary care physicians from different geographical regions in France...
January 2016: Santé Publique: Revue Multidisciplinaire Pour la Recherche et L'action
Luigi Scietti, Katia Sampieri, Irene Pinzuti, Erika Bartolini, Barbara Benucci, Alessia Liguori, Andreas F Haag, Paola Lo Surdo, Werner Pansegrau, Vincenzo Nardi-Dei, Laura Santini, Seguinde Arora, Xavier Leber, Simonetta Rindi, Silvana Savino, Paolo Costantino, Domenico Maione, Marcello Merola, Pietro Speziale, Matthew J Bottomley, Fabio Bagnoli, Vega Masignani, Mariagrazia Pizza, Meike Scharenberg, Jean-Marc Schlaeppi, Mikkel Nissum, Sabrina Liberatori
During bacterial pathogenesis extensive contacts between the human and the bacterial extracellular proteomes take place. The identification of novel host-pathogen interactions by standard methods using a case-by-case approach is laborious and time consuming. To overcome this limitation, we took advantage of large libraries of human and bacterial recombinant proteins. We applied a large-scale protein microarray-based screening on two important human pathogens using two different approaches: (I) 75 human extracellular proteins were tested on 159 spotted Staphylococcus aureus recombinant proteins and (II) Neisseria meningitidis adhesin (NadA), an important vaccine component against serogroup B meningococcus, was screened against ≈2300 spotted human recombinant proteins...
2016: Scientific Reports
L Pasquesoone, A Belkhou, L Gottrand, P Guerreschi, V Duquennoy-Martinot
Purpura fulminans is a pediatric life-threatening emergency with a significant mortality, combining: septic shock, extensive purpuric lesions and disseminated intravascular coagulation. The most frequent bacterial pathogen is the meningococcus. The medical management includes antibiotics, corticoids, vascular filling and catecholamines. Purpura fulminans is characterized by the extent of hemorrhagic and mainly thrombotic lesions, attributed to the alteration in the vascular endothelium functions. Damage of soft tissues combines large necrotic areas and more or less extensive distal ischemic lesions...
June 8, 2016: Annales de Chirurgie Plastique et Esthétique
R Buzelé, L Barbier, A Sauvanet, B Fantin
Splenectomy is attended by medical complications, principally infectious and thromboembolic; the frequency of complications varies with the conditions that led to splenectomy (hematologic splenectomy, trauma, presence of portal hypertension). Most infectious complications are caused by encapsulated bacteria (Meningococcus, Pneumococcus, Hemophilus). These occur mainly in children and somewhat less commonly in adults within the first two years following splenectomy. Post-splenectomy infections are potentially severe with overwhelming post-splenectomy infection (OPSI) and this justifies preventive measures (prophylactic antibiotics, appropriate immunizations, patient education) and demands prompt antibiotic management with third-generation cephalosporins for any post-splenectomy fever...
August 2016: Journal of Visceral Surgery
P Stefanelli, C Fazio, A Neri, A Ciammaruconi, E Balocchini, A Anselmo, C Azzari, G M Rossolini, P Vacca, A Fortunato, A Palozzi, S Fillo, F Lista, M Moriondo, F Nieddu, G Rezza
OBJECTIVES: To describe a spatio-temporal cluster of invasive meningococcal disease (IMD) due to serogroup C meningococci, occurred in a restricted area of Tuscany between January and October 2015, and the results of whole genome sequencing (WGS). METHODS: Surveillance activities and public health measures were implemented in the Region. Bacterial isolates from IMD cases were characterized by the National Reference Laboratory of the Istituto Superiore di Sanità (ISS), and WGS was performed on available strains...
August 2016: Journal of Infection
Alisa Kachikis, Janet A Englund
Immunizing the pregnant woman to protect both the mother and her infant from infection has been utilized increasingly over the last decade. New outbreaks of pandemic influenza and the resurgence of pertussis have resulted in policy changes and shifts in health authority recommendations for a number of vaccines aimed to protect both pregnant women and their infants in the first months of life. The ability of maternal immunoglobulin IgG antibodies to be transported readily across the healthy intact placenta depends on many different factors including gestational age in the pregnancy, nature and timing of the immunization and presence of maternal HIV or malaria infections...
July 5, 2016: Journal of Infection
Adam Finn, Begonia Morales-Aza, Paulina Sikora, Jessica Giles, Ryan Lethem, Matko Marlais, Valtyr Thors, Andrew J Pollard, Saul Faust, Paul Heath, Ian Vipond, Muriel Ferreira, Peter Muir, Luís Januário, Fernanda Rodrigues
BACKGROUND: Improved understanding of Neisseria meningitidis (Nm) carriage biology and better methods for detection and quantification would facilitate studies of potential impact of new vaccines on colonization and transmission in adolescents. METHODS: We performed plate cultures on 107 oropharyngeal swabs stored frozen in skim milk tryptone glucose glycerol (STGG) broth and previously positive for Nm. We compared quantitative polymerase chain reaction (qPCR) detection of Nm in 601 STGG-swabs with culture...
October 2016: Pediatric Infectious Disease Journal
Justin L Kandler, Concerta L Holley, Jennifer L Reimche, Vijaya Dhulipala, Jacqueline T Balthazar, Artur Muszyński, Russell W Carlson, William M Shafer
During infection, the sexually transmitted pathogen Neisseria gonorrhoeae (the gonococcus) encounters numerous host-derived antimicrobials, including cationic antimicrobial peptides (CAMPs) produced by epithelial and phagocytic cells. CAMPs have both direct and indirect killing mechanisms and help link the innate and adaptive immune responses during infection. Gonococcal CAMP resistance is likely important for avoidance of host nonoxidative killing systems expressed by polymorphonuclear granulocytes (e.g., neutrophils) and intracellular survival...
August 2016: Antimicrobial Agents and Chemotherapy
Ruby Paul, Karen Greaves, Siba Prosad Paul
No abstract text is available yet for this article.
May 2016: Emergency Nurse: the Journal of the RCN Accident and Emergency Nursing Association
M Thimmesch, E Bodart, P Gavage, J-P Misson, J Frère
INTRODUCTION: Neisseria meningitidis is a Gram-negative bacteria that can be highly pathogenic in humans and responsible for life-threatening and acute diseases. In a few cases, it can lead to an atypical form of sepsis-acute, subacute, or chronic-which, even if progression is slower, may carry the same risks for patients as conventional acute forms. CASES: Case 1 presented with recurrent fever, polyarthralgia, and generalized macular rash. Case 2 had fever for the previous 10days with neck pain and macular rash...
June 2016: Archives de Pédiatrie: Organe Officiel de la Sociéte Française de Pédiatrie
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