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Pneumococcal invasive disease

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https://www.readbyqxmd.com/read/28326311/increased-incidence-of-adult-pneumococcal-pneumonia-during-school-holiday-periods
#1
Priya Daniel, Chamira Rodrigo, Thomas Bewick, Carmen Sheppard, Sonia Greenwood, Tricia M McKeever, Mary Slack, Wei Shen Lim
Child contact is a recognised risk factor for adult pneumococcal disease. Peaks in invasive pneumococcal disease incidence observed during winter holidays may be related to changes in social dynamics. This analysis was conducted to examine adult pneumococcal community-acquired pneumonia (CAP) incidence during school holiday periods. Between September 2008 and 2013, consecutive adults admitted to hospitals covering the Greater Nottingham area with a diagnosis of CAP were studied. Pneumococcal pneumonia was detected using culture and antigen detection methods...
January 2017: ERJ Open Research
https://www.readbyqxmd.com/read/28326061/come-an-essential-response-regulator-negatively-regulates-the-expression-of-the-capsular-polysaccharide-locus-and-attenuates-the-bacterial-virulence-in-streptococcus-pneumoniae
#2
Yuqiang Zheng, Xuemei Zhang, Xiaofang Wang, Libin Wang, Jinghui Zhang, Yibing Yin
The capsular polysaccharide (CPS) of Streptococcus pneumoniae is the main virulence factors required for effective colonization and invasive disease. The capacity to regulate CPS production at the transcriptional level is critical for the survival of S. pneumoniae in different host niches, but little is known about the transcription regulators of cps locus. In the present study, we isolated and identified the response regulator ComE, the master competence switch in transformation of S. pneumoniae, as a transcriptional regulator of cps locus by DNA affinity chromatography-pulldown, MALDI-TOF mass spectrometry (MS) and electrophoretic mobility shift assay (EMSA)...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28321436/pneumococcal-antibody-titers-a-comparison-of-patients-receiving-intravenous-immunoglobulin-versus-subcutaneous-immunoglobulin
#3
Pamella F Abghari, Pavadee Poowuttikul, Elizabeth Secord
Purpose: Immunoglobulin replacement is the mainstay treatment in patients with humoral immunodeficiencies, yet a handful of patients continue to develop sinopulmonary infections while on therapy. The objective of our study was to compare immunoglobulin G (IgG) pneumococcal antibody levels in patients with humoral immune deficiencies who have been on intravenous immunoglobulin (IVIG) replacement for at least 1 year to those on subcutaneous immunoglobulin (SCIG) therapy for at least 1 year. Methods: A retrospective chart review was completed on 28 patients...
2017: Global Pediatric Health
https://www.readbyqxmd.com/read/28300529/sex-differences-in-invasive-pneumococcal-disease-and-the-impact-of-pneumococcal-conjugate-vaccination-in-the-netherlands-2004-to-2015
#4
Gertjan H J Wagenvoort, Elisabeth A M Sanders, Bart J Vlaminckx, Hester E de Melker, Arie van der Ende, Mirjam J Knol
Implementation of pneumococcal conjugate vaccines in the Netherlands (PCV7 in 2006 and PCV10 in 2011) for infants caused a shift in serotypes in invasive pneumococcal disease (IPD). We explored sex differences in serotype-specific IPD incidence before and after vaccine introduction. Incidences in the pre-PCV7 (June 2004-May 2006), post-PCV7 (June 2008-May 2011) and post-PCV10 period (June 2013-May 2015), stratified by age, were compared. Incidence was higher in men for all age groups (overall in men: 16.7, 15...
March 9, 2017: Euro Surveillance: Bulletin Européen sur les Maladies Transmissibles, European Communicable Disease Bulletin
https://www.readbyqxmd.com/read/28284682/childhood-pneumococcal-disease-in-africa-a-systematic-review-and-meta-analysis-of-incidence-serotype-distribution-and-antimicrobial-susceptibility
#5
REVIEW
Pui-Ying Iroh Tam, Beth K Thielen, Stephen K Obaro, Ann M Brearley, Alexander M Kaizer, Haitao Chu, Edward N Janoff
BACKGROUND: Determining the incidence, disease-associated serotypes and antimicrobial susceptibility of invasive pneumococcal disease (IPD) among children in Africa is essential in order to monitor the impact of these infections prior to widespread introduction of the pneumococcal conjugate vaccine (PCV). METHODS: To provide updated estimates of the incidence, serotype distribution, and antimicrobial susceptibility profile of Streptococcus pneumoniae causing disease in Africa, we performed a systematic review of articles published from 2000 to 2015 using Ovid Medline and Embase...
March 8, 2017: Vaccine
https://www.readbyqxmd.com/read/28266699/rapidly-progressive-and-almost-lethal-pneumonia
#6
Juancarlo Martínez-González, Carlos Robles-Arias, William Rodríguez-Cintrón
We herein describe the case of a 65-year-old male patient who presented with Osler's triad, which is the combination of endocarditis, pneumonia, and meningitis. This report is even more unusual since the pathogen isolated was the invasive and virulent strain of Streptococcus pneumoniae serotype 3. The clinical entity described is also called Austrian syndrome. Even though rare in this antibiotic era, the syndrome remains one of high morbidity and mortality. This particular case is of paramount importance for the clinician reader...
March 2017: Puerto Rico Health Sciences Journal
https://www.readbyqxmd.com/read/28262334/long-term-mortality-after-ipd-and-bacteremic-versus-non-bacteremic-pneumococcal-pneumonia
#7
Gertjan H J Wagenvoort, Elisabeth A M Sanders, Hester E de Melker, Arie van der Ende, Bart J Vlaminckx, Mirjam J Knol
BACKGROUND: Short-term mortality after invasive pneumococcal disease (IPD) and pneumococcal pneumonia is high but data on long-term mortality (including the comparison between bacteremic and non-invasive/non-bacteremic pneumococcal pneumonia) within the first years after diagnosis are scarce. METHODS: Adult patients with 'non-pneumonia' IPD and 'invasive pneumonia' (from 2004 to 2012) and with 'bacteremic' vs 'non-invasive/non-bacteremic (NI/NB)' pneumococcal pneumonia (from 2008 to 2012) diagnosed by negative blood culture but a positive urinary antigen test (UAT) were identified in a Dutch hospital...
March 2, 2017: Vaccine
https://www.readbyqxmd.com/read/28246534/forecasting-trends-in-invasive-pneumococcal-disease-among-elderly-adults-in-quebec
#8
Z Zhou, G Deceuninck, B Lefebvre, P De Wals
Background. In Canada, the current recommendation is to offer PPV23 to adults ≥ 65 years. PCV13 is now licensed for adults. Methods. Invasive pneumococcal disease (IPD) cases in adults 65-74 years of age in the Quebec notifiable diseases registry were classified into five serotype categories. Poisson regression models were fitted to monthly rates observed in 2000-2014 and predictions were made for 2015-2024, using theoretical assumptions regarding indirect effects of childhood vaccination and serotype replacement...
2017: Canadian Journal of Infectious Diseases & Medical Microbiology
https://www.readbyqxmd.com/read/28242069/conjugation-of-peg-hexadecane-markedly-increases-the-immunogenicity-of-pneumococcal-polysaccharide-conjugate-vaccine
#9
Xin Chang, Weili Yu, Shaoyang Ji, Lijuan Shen, Aijuan Tan, Tao Hu
Streptococcus pneumoniae is a serious Gram-positive pathogen that can lead to an invasive pneumococcal disease with high mortality rate. Pneumococcal capsular polysaccharide (PS) is a key virulence determinant and its immunogenicity can be increased by conjugation with a carrier protein. However, the PS-specific cellular and humoral immunity of pneumococcal conjugate vaccine needs further improvement. Hexadecane (HD) is an element of lipid that decorates the surface of nearly all microbial classes. Polyethylene glycol (PEG)-HD conjugate (PEG-HD) is soluble and can act as an adjuvant...
February 24, 2017: Vaccine
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
#10
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
#11
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
#12
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
#13
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
#14
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
#15
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
#16
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
#17
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
#18
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
#19
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
#20
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
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