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Pneumococcal invasive disease

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https://www.readbyqxmd.com/read/28216181/changing-trends-in-serotypes-of-s-pneumoniae-isolates-causing-invasive-and-non-invasive-diseases-in-unvaccinated-population-in-mexico-2000-2014
#1
María Noemí Carnalla-Barajas, Araceli Soto-Noguerón, Miguel Angel Sánchez-Alemán, Fortino Solórzano-Santos, María Elena Velazquez-Meza, Gabriela Echániz-Aviles
OBJECTIVE: Introduction of pneumococcal conjugate vaccines (PCV) targeted against a limited number of serotypes substantially decreased invasive (IPD) and non-invasive pneumococcal diseases (NIPD) but it was accompanied by non-vaccine type replacement disease. After 9 years of introduction of PCV in Mexico, we analyze the evidence of the indirect effects on IPD and NIPD serotype distribution among groups not targeted to receive the vaccine. METHODS: From January 2000 to December 2014, pneumococcal strains isolated from IPD and NIPD cases from patients ≥5 years of age from participant hospitals of the SIREVA II (Sistema Regional de Vacunas) network, were serotyped...
February 16, 2017: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/28215915/serotype-distribution-and-antimicrobial-susceptibility-of-streptococcus-pneumoniae-isolates-from-adult-patients-in-jakarta-indonesia
#2
Wahyu Finasari Said, Edy Sukoto, Miftahuddin Majid Khoeri, July Kumalawati, Dodi Safari
Currently, the data on pneumococcal invasive disease in the Indonesian population are limited. In this study, we investigated the serotype distribution and antimicrobial susceptibility of Streptococcus pneumoniae. These samples were isolated from the sputum of adult patients with non-specific clinical symptoms aged 18-87 years in Jakarta, Indonesia, from August to October 2014. Of the 349 sputum specimens, thirteen isolates were identified as S. pneumoniae strains (4%), with two strains each for serotype 19F, 3, and 15A, and one strain each for serotype/serogroup 13, 23A, 6, 34, 17F, 16F, and untypeable...
February 16, 2017: Journal of Infection and Public Health
https://www.readbyqxmd.com/read/28211009/pneumococcal-predictive-proteins-selected-by-microbial-genomic-approach-are-serotype-cross-reactive-and-bind-to-host-extracellular-matrix-proteins
#3
Ana Paula Corrêa Argondizzo, Cláudio Marcos Rocha-de-Souza, Marta de Almeida Santiago, Ricardo Galler, Joice Neves Reis, Marco Alberto Medeiros
Streptococcus pneumoniae is a colonizer of the human nasopharynx, which accounts for most of the community-acquired pneumonia cases and can cause non-invasive and invasive diseases. Current available vaccines are serotype-specific and the use of recombinant proteins associated with virulence is an alternative to compose vaccines and to overcome these problems. In a previous work, we describe the identification of proteins in S. pneumoniae by reverse vaccinology and the genetic diversity of these proteins in clinical isolates...
February 17, 2017: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/28209711/serotype-3-pneumococci-sequester-platelet-derived-human-thrombospondin-1-via-the-adhesin-and-immune-evasion-protein-hic
#4
Ulrike Binsker, Thomas P Kohler, Krystin Krauel, Sylvia Kohler, Johanna Habermeyer, Hansjörg Schwertz, Sven Hammerschmidt
Streptococcus pneumoniae serotype 3 strains emerge frequently within clinical isolates of invasive diseases. Bacterial invasion into deeper tissues is associated with colonization and immune evasion mechanisms. Thus, pneumococci express a versatile repertoire of surface proteins sequestering and interacting specifically with components of the human extracellular matrix and serum. Hic, a PspC-like pneumococcal surface protein possesses vitronectin and Factor H binding activity. Here, we show that heterologously expressed Hic domains interact, similar to the classical PspC molecule, with human matricellular thrombospondin-1 (hTSP-1)...
February 16, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28207888/effect-of-the-different-13-valent-pneumococcal-conjugate-vaccination-uptakes-on-the-invasive-pneumococcal-disease-in-children-analysis-of-a-hospital-based-and-population-based-surveillance-study-in-madrid-spain-2007-2015
#5
Juan Picazo, Jesús Ruiz-Contreras, Juan Casado-Flores, Sagrario Negreira, Fernando Baquero, Teresa Hernández-Sampelayo, Enrique Otheo, Cristina Méndez
In the Community of Madrid, the 13-valent pneumococcal conjugate vaccine (PCV13) replaced the 7-valent (PCV7) in the fully government-funded Regional Immunization Program (RIP) in May, 2010, but was later excluded in May, 2012, and included again in January, 2015. These unique changes allowed us to assess the impact of the different pneumococcal vaccination policies on PCV13 uptake in infants and on the incidence rate (IR) of invasive pneumococcal disease (IPD) in children <15 years old. In this prospective, active, surveillance study, we estimated PCV13 uptakes, IR and incidence rate ratios (IRR) for total IPD and for IPD caused by PCV13- and non-PCV13 serotypes in children <15 years, stratified by age, in four periods with different vaccination policies: fully government-funded PCV7 vaccination, fully government-funded PCV13, mixed public/private funding and only private funding...
2017: PloS One
https://www.readbyqxmd.com/read/28198169/-consensus-document-on-pneumococcal-vaccination-in-adults-at-risk-by-age-and-underlying-clinical-conditions-2017-update
#6
F González-Romo, J J Picazo, A García Rojas, M Labrador Horrillo, V Barrios, M C Magro, P Gil Gregorio, R de la Cámara, A Rodríguez, J Barberán, F Botía Martínez, M Linares Rufo, I Jimeno Sanz, J M Portolés, F Sanz Herrero, J Espinosa Arranz, V García-Sánchez, M Galindo Izquierdo, E Mascarós
Invasive pneumococcal disease (IPD) and pneumococcal pneumonia (PP) represent an important health problem among aging adults and those with certain underlying pathologies and some diseases, especially immunosuppressed and some immunocompetent subjects, who are more susceptible to infections and present greater severity and worse evolution. Among the strategies to prevent IPD and PP, vaccination has its place, although vaccination coverage in this group is lower than desirable. Nowadays, there are 2 vaccines available for adults...
February 15, 2017: Revista Española de Quimioterapia: Publicación Oficial de la Sociedad Española de Quimioterapia
https://www.readbyqxmd.com/read/28193634/purified-streptococcus-pneumoniae-endopeptidase-o-pepo-enhances-particle-uptake-by-macrophages-in-a-tlr2-and-mir-155-dependent-manner
#7
Hua Yao, Hong Zhang, Kai Lan, Hong Wang, Yufeng Su, Dagen Li, Zhixin Song, Fang Cui, Yibing Yin, Xuemei Zhang
Insights into the host-microbial virulence factors interaction, especially the immune-signaling mechanisms, could provide novel prevention and treatment options for pneumococcal diseases. Streptococcus pneumoniae endopeptidase O (PepO) is a newly discovered and ubiquitously expressed pneumococcal virulence protein. A PepO-mutant strain showed impaired adherence to and invasion of host cells compared with their isogenic wild-type strains. It is still unknown whether PepO is involved in host defense response against pneumococcal infection...
February 13, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28190742/pcv13-serotype-decrease-in-italian-adolescents-and-adults-in-the-post-pcv13-era-herd-protection-from-children-or-secular-trend
#8
Francesco Nieddu, Maria Moriondo, Elisa De Vitis, Silvia Ricci, Giuseppe Indolfi, Massimo Resti, Caterina Vocale, Maria Paola Landini, Assunta Sartor, Chiara Azzari
BACKGROUND AND AIM OF THE WORK: In 2010 PCV13 replaced PCV7 in the pediatric vaccination schedule for Italian children. While a strong herd effect was demonstrated for PCV7, a possible herd effect due to PCV13 is still under debate. Our aim was to evaluate differences in the distribution of pneumococcal serotypes between the pre and post-PCV13 eras in unvaccinated Italian adolescents and adults with laboratory-confirmed pneumococcal infection from 3 Italian Regions with a high rate of PCV13 vaccination of children...
February 9, 2017: Vaccine
https://www.readbyqxmd.com/read/28173960/exploratory-efficacy-endpoints-in-the-community-acquired-pneumonia-immunization-trial-in-adults-capita
#9
Chris Webber, Michael Patton, Scott Patterson, Beate Schmoele-Thoma, Susanne M Huijts, Marc J M Bonten
BACKGROUND: The Community-Acquired Pneumonia Immunization Trial in Adults (CAPiTA) assessed vaccine-type community-acquired pneumonia (VT-CAP) and vaccine-type invasive pneumococcal disease (VT-IPD) prevention with 13-valent pneumococcal conjugate vaccine (PCV13) in adults aged ⩾65years. We report vaccine efficacy (VE) of PCV13 for the remaining 23 exploratory endpoints and serotype distributions for pneumococcal CAP and IPD. METHODS: This was a parallel-group, randomised, placebo-controlled, double-blind trial comparing single-dose PCV13 with placebo...
March 1, 2017: Vaccine
https://www.readbyqxmd.com/read/28161422/il-17a-and-complement-contribute-to-killing-of-pneumococci-following-immunization-with-a-pneumococcal-whole-cell-vaccine
#10
Ivana B Campos, Muriel Herd, Kristin L Moffitt, Ying-Jie Lu, Michelle Darrieux, Richard Malley, Luciana C C Leite, Viviane M Gonçalves
The pneumococcal whole cell vaccine (PWCV) has been investigated as an alternative to polysaccharide-based vaccines currently in use. It is a non-encapsulated killed vaccine preparation that induces non-capsular antibodies protecting mice against invasive pneumococcal disease (IPD) and reducing nasopharyngeal (NP) carriage via IL-17A activation of mouse phagocytes. Here, we show that PWCV induces antibody and IL-17A production to protect mice against challenge in a fatal aspiration-sepsis model after only one dose...
February 1, 2017: Vaccine
https://www.readbyqxmd.com/read/28161295/serotype-distribution-and-antimicrobial-susceptibility-of-streptococcus-pneumoniae-strains-isolated-in-japan-after-introduction-of-the-routine-immunization-program
#11
Haruko Miyazaki, Rie Shibuya, Naoko Midorikawa, Bin Chang, Makoto Ohnishi, Tetsuya Matsumoto
Pneumococcal vaccines have reduced the incidences of Streptococcus pneumoniae infections among children and adults, but a relative increase in the prevalence of non-vaccine serotypes has been reported. To follow the changing epidemiology of pneumococcal diseases, capsular serotyping and antimicrobial susceptibility testing was performed on 534 pneumococcal isolates obtained from a hospital in Japan after routine immunization was launched, between October 2014 and May 2016. Serotype distributions and antimicrobial susceptibilities were evaluated among the total patient population, and were compared by age and sample groups and by serotype group, respectively...
February 1, 2017: Journal of Infection and Chemotherapy: Official Journal of the Japan Society of Chemotherapy
https://www.readbyqxmd.com/read/28152029/clonal-and-serotype-dynamics-of-serogroup-6-isolates-causing-invasive-pneumococcal-disease-in-portugal-1999-2012
#12
Jorge Diamantino-Miranda, Sandra Isabel Aguiar, João André Carriço, José Melo-Cristino, Mário Ramirez
Although serogroup 6 was among the first to be recognized among Streptococcus pneumoniae, several new serotypes were identified since the introduction of pneumococcal conjugate vaccines (PCVs). A decrease of the 6B-2 variant among invasive pneumococcal disease (IPD), but not 6B-1, was noted post conjugate vaccine introduction, underpinned by a decrease of CC273 isolates. Serotype 6C was associated with adult IPD and increased in this age group representing two lineages (CC315 and CC395), while the same lineages expressed other serogroup 6 serotypes in children...
2017: PloS One
https://www.readbyqxmd.com/read/28149700/retrospective-study-of-prognostic-factors-in-pediatric-invasive-pneumococcal-disease
#13
Nan-Chang Chiu, Hsin Chi, Chun-Chih Peng, Hung-Yang Chang, Daniel Tsung-Ning Huang, Lung Chang, Wei-Te Lei, Chien-Yu Lin
Streptococcus pneumoniae remains the leading causative pathogen in pediatric pneumonia and bacteremia throughout the world. The invasive pneumococcal disease (IPD) is known as isolation of S. pneumoniae from a normally sterile site (e.g., blood, cerebrospinal fluid, synovial fluid, pericardial fluid, pleural fluid, or peritoneal fluid). The aim of this study is to survey the clinical manifestations and laboratory results of IPD and identify the prognostic factors of mortality. From January 2001 to December 2006, a retrospective review of chart was performed in a teaching hospital in Taipei...
2017: PeerJ
https://www.readbyqxmd.com/read/28139443/effectiveness-of-the-13-valent-pneumococcal-conjugate-vaccine-against-invasive-pneumococcal-disease-in-south-african-children-a-case-control-study
#14
Cheryl Cohen, Claire von Mollendorf, Linda de Gouveia, Sarona Lengana, Susan Meiring, Vanessa Quan, Arthermon Nguweneza, David P Moore, Gary Reubenson, Mamokgethi Moshe, Shabir A Madhi, Brian Eley, Ute Hallbauer, Heather Finlayson, Sheeba Varughese, Katherine L O'Brien, Elizabeth R Zell, Keith P Klugman, Cynthia G Whitney, Anne von Gottberg
BACKGROUND: The 13-valent pneumococcal conjugate vaccine (PCV13) was designed to include disease-causing serotypes that are important in low-income and middle-income countries. Vaccine effectiveness estimates are scarce in these settings. South Africa replaced PCV7 with PCV13 in 2011 using a 2 + 1 schedule. We aimed to assess the effectiveness of two or more doses of PCV13 against invasive pneumococcal disease in children with HIV infection and in those not infected with HIV. METHODS: Cases of invasive pneumococcal disease in children aged 5 years or younger were identified through national laboratory-based surveillance...
March 2017: Lancet Global Health
https://www.readbyqxmd.com/read/28135322/naturally-acquired-human-immunity-to-pneumococcus-is-dependent-on-antibody-to-protein-antigens
#15
Robert Wilson, Jonathan M Cohen, Mark Reglinski, Ricardo J Jose, Win Yan Chan, Helina Marshall, Corné de Vogel, Stephen Gordon, David Goldblatt, Fernanda C Petersen, Helen Baxendale, Jeremy S Brown
Naturally acquired immunity against invasive pneumococcal disease (IPD) is thought to be dependent on anti-capsular antibody. However nasopharyngeal colonisation by Streptococcus pneumoniae also induces antibody to protein antigens that could be protective. We have used human intravenous immunoglobulin preparation (IVIG), representing natural IgG responses to S. pneumoniae, to identify the classes of antigens that are functionally relevant for immunity to IPD. IgG in IVIG recognised capsular antigen and multiple S...
January 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28132873/detection-of-macrolide-resistance-genes-in-culture-negative-specimens-from-bangladeshi-children-with-invasive-pneumococcal-diseases
#16
Md Hasanuzzaman, Roly Malaker, Maksuda Islam, Abdullah H Baqui, Gary L Darmstadt, Cynthia G Whitney, Samir K Saha
OBJECTIVES: In recent years, an increasing prevalence of macrolide resistance among pneumococci in Bangladesh has been observed. However, the scenario remains incomplete, as few isolates (<1%) are available from pneumonia cases and most pneumococcal meningitis cases (>80%) are culture-negative. This study optimised a triplex PCR method to detect macrolide resistance genes (MRGs) (mefA and ermB) and cpsA from culture-negative pneumococcal cases to predict the prevalence and level of macrolide resistance...
January 26, 2017: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/28131730/distribution-of-capsular-types-and-drug-resistance-patterns-of-invasive-pediatric-streptococcus-pneumoniae-isolates-in-teheran-iran
#17
Hamidreza Houri, Abdolah Karimi, Yasaman Saee, Fatemeh Fallah, Mohamad Rahbar, Sedigheh Rafiei Tabatabaei
OBJECTIVES: To explore the serotype distribution and drug resistance patterns of invasive pneumococcal isolates from children under 5 years of age. METHODS: During a 32-month period, 585 clinical samples (including blood, cerebrospinal fluid (CSF), and synovial fluid) from children suspected of having meningitis, sepsis, pneumonia, or septic arthritis were analyzed using the BACTEC culture system. Positive cultures were examined using biochemical tests and lytA amplification for the identification of pneumococcal strains...
January 25, 2017: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/28125588/comparison-of-serotype-prevalence-of-pneumococci-isolated-from-middle-ear-lower-respiratory-tract-and-invasive-disease-prior-to-vaccination-in-iceland
#18
Martha Á Hjálmarsdóttir, Sigríður Júlía Quirk, Gunnsteinn Haraldsson, Helga Erlendsdóttir, Ásgeir Haraldsson, Karl G Kristinsson
BACKGROUND: Information on pneumococcal serotype distribution before vaccination is a prerequisite for evaluation of vaccine effect. The aim was to investigate the prevalence of pneumococcal serotypes isolated from middle ear (ME), lower respiratory tract (LRT) and from invasive disease (IPD) in Iceland prior to implementation of ten-valent pneumococcal Haemophilus influenzae protein D conjugate vaccine (PHiD-CV-10) into the infant vaccination program (April 2011). METHODS AND FINDINGS: All isolates cultured 2007-2011 from ME, LRT and IPD identified as pneumococci were serotyped and tested for susceptibility at the Clinical Microbiology Department, Landspitali University Hospital that serves approximately 85% of the Icelandic population...
2017: PloS One
https://www.readbyqxmd.com/read/28125317/pneumococcal-serotype-distribution-a-snapshot-of-recent-data-in-pediatric-and-adult-populations-around-the-world
#19
Yadong A Cui, Harshila Patel, William M O'Neil, Se Li, Patricia Saddier
S. pneumoniae infection remains a serious public health concern despite the availability of vaccines covering up to 23 of more than 94 known serotypes. The purpose of the present study was to monitor recent serotype distribution data. PubMed, EMBASE, Cochrane Reviews and Ingenta databases were searched. Serotype data covering invasive pneumococcal disease (IPD) and non-IPD were extracted from articles published from March 2014 to March 2015. Fifty-nine studies presented pneumococcal serotype prevalence by specific age categories...
January 26, 2017: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/28112068/coeliac-disease-and-invasive-pneumococcal-disease-a-population-based-cohort-study
#20
A Röckert Tjernberg, J Bonnedahl, M Inghammar, A Egesten, G Kahlmeter, P Nauclér, B Henriques-Normark, J F Ludvigsson
Severe infections are recognized complications of coeliac disease (CD). In the present study we aimed to examine whether individuals with CD are at increased risk of invasive pneumococcal disease (IPD). To do so, we performed a population-based cohort study including 29 012 individuals with biopsy-proven CD identified through biopsy reports from all pathology departments in Sweden. Each individual with CD was matched with up to five controls (n = 144 257). IPD events were identified through regional and national microbiological databases, including the National Surveillance System for Infectious Diseases...
January 23, 2017: Epidemiology and Infection
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