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Streptococcus pneumoniae in childrens

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https://www.readbyqxmd.com/read/27922126/viral-and-bacterial-co-infection-in-severe-pneumonia-triggers-innate-immune-responses-and-specifically-enhances-ip-10-a-translational-study
#1
Jonathan Hoffmann, Daniela Machado, Olivier Terrier, Stephane Pouzol, Mélina Messaoudi, Wilma Basualdo, Emilio E Espínola, Rosa M Guillen, Manuel Rosa-Calatrava, Valentina Picot, Thomas Bénet, Hubert Endtz, Graciela Russomando, Gláucia Paranhos-Baccalà
Mixed viral and bacterial infections are widely described in community-acquired pneumonia; however, the clinical implications of co-infection on the associated immunopathology remain poorly studied. In this study, microRNA, mRNA and cytokine/chemokine secretion profiling were investigated for human monocyte-derived macrophages infected in-vitro with Influenza virus A/H1N1 and/or Streptococcus pneumoniae. We observed that the in-vitro co-infection synergistically increased interferon-γ-induced protein-10 (CXCL10, IP-10) expression compared to the singly-infected cells conditions...
December 6, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27919900/n-acetyl-l-cysteine-and-cysteamine-new-strategies-against-mixed-biofilms-of-non-encapsulated-streptococcus-pneumoniae-and-non-typeable-haemophilus-influenzae
#2
Mirian Domenech, Ernesto García
Acute otitis media, a polymicrobial disease of the middle ear cavity of children, is a significant public health problem worldwide. It is most frequently caused by encapsulated Streptococcus pneumoniae and non-typeable Haemophilus influenzae, although the widespread use of pneumococcal conjugate vaccines is apparently producing an increase in carriage of non-encapsulated S. pneumoniae Frequently, pneumococci and H. influenzae live together in the human nasopharynx forming a self-produced biofilm. Biofilms represent a global medical challenge since the inherent antibiotic resistance of their producers demands the use of high doses of antibiotics over prolonged periods...
December 5, 2016: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/27918383/etiology-of-acute-otitis-media-in-children-less-than-5-years-of-age-a-pooled-analysis-of-10-similarly-designed-observational-studies
#3
Melissa K Van Dyke, Jean-Yves Pirçon, Robert Cohen, Shabir A Madhi, Andrés Rosenblüt, Mercedes Macias Parra, Khalid Al-Mazrou, Gerhard Grevers, Pio Lopez, Laura Naranjo, Felix Pumarola, Nuntigar Sonsuwan, William P Hausdorff
BACKGROUND: Acute otitis media (AOM) is an important cause of childhood morbidity and antibiotic prescriptions. However, the relative importance of the well-known otopathogens, Streptococcus pneumoniae (Spn) and Haemophilus influenzae (Hflu), remains unclear due to a limited number of tympanocentesis-based studies that vary significantly in populations sampled, case definitions, and heptavalent pneumococcal conjugate vaccine (PCV7-CRM) use. METHODS: We conducted a pooled analysis of results from ten AOM etiology studies of similar design the protocols of which were derived from a common protocol and conducted in children 3 months to 5 years of age in different countries...
November 30, 2016: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/27916211/a-32-year-study-of-the-effect-of-pneumococcal-vaccines-on-invasive-streptococcus-pneumoniae-disease
#4
Ronald J Stanek, Nancy B Norton, Maurice A Mufson
BACKGROUND: Worldwide, Streptococcus pneumoniae commonly causes community-acquired pneumonia, meningitis, septicemia and otitis media. Invasive pneumococcal infection (IPD) represents the most serious presentation, occurs in approximately 1 in 4 cases and engenders case fatality rates (CFR) in pneumonia of 20-25% and meningitis of 35-40%. We investigated IPD for 32 years in an American city to assess the effect of differing pneumococcal vaccines on serotype occurrence and CFR among children and adults...
December 2016: American Journal of the Medical Sciences
https://www.readbyqxmd.com/read/27907156/increased-nasopharyngeal-density-and-concurrent-carriage-of-streptococcus-pneumoniae-haemophilus-influenzae-and-moraxella-catarrhalis-are-associated-with-pneumonia-in-febrile-children
#5
Sopio Chochua, Valérie D'Acremont, Christiane Hanke, David Alfa, Joshua Shak, Mary Kilowoko, Esther Kyungu, Laurent Kaiser, Blaise Genton, Keith P Klugman, Jorge E Vidal
BACKGROUND: We assessed nasopharyngeal (NP) carriage of five pathogens in febrile children with and without acute respiratory infection (ARI) of the upper (URTI) or lower tract, attending health facilities in Tanzania. METHODS: NP swabs collected from children (N = 960) aged 2 months to 10 years, and with a temperature ≥38°C, were utilized to quantify bacterial density of S. pneumoniae (Sp), H. influenzae (Hi), M. catarrhalis (Mc), S. aureus (Sa), and N. meningitidis (Nm)...
2016: PloS One
https://www.readbyqxmd.com/read/27889801/production-and-purification-of-an-untagged-recombinant-pneumococcal-surface-protein-a-pspa4pro-with-high-purity-and-low-endotoxin-content
#6
Douglas B Figueiredo, Eneas Carvalho, Mauricio P Santos, Stefanie Kraschowetz, Rafaela T Zanardo, Gilson Campani, Gabriel G Silva, Cíntia R Sargo, Antonio Carlos L Horta, Roberto de C Giordano, Eliane N Miyaji, Teresa C Zangirolami, Joaquin Cabrera-Crespo, Viviane Maimoni Gonçalves
Streptococcus pneumoniae is the main cause of pneumonia, meningitis, and other conditions that kill thousands of children every year worldwide. The replacement of pneumococcal serotypes among the vaccinated population has evidenced the need for new vaccines with broader coverage and driven the research for protein-based vaccines. Pneumococcal surface protein A (PspA) protects S. pneumoniae from the bactericidal effect of human apolactoferrin and prevents complement deposition. Several studies indicate that PspA is a very promising target for novel vaccine formulations...
November 26, 2016: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/27889249/analysis-of-streptococcus-pneumoniae-and-haemophilus-influenzae-isolated-from-middle-ear-fluid-before-and-after-the-introduction-of-government-subsidies-for-pneumococcal-and-h-%C3%A2-influenzae-type-b-vaccines-in-japan
#7
Tadashi Hoshino, Noriko Takeuchi, Chie Fukasawa, Shoko Hirose, Hideyuki Okui, Hiroko Sato, Mari Sato, Yukiko Arimoto, Atsuko Nakano, Naruhiko Ishiwada
This study aimed to identify trends in frequency, serotype, and antimicrobial susceptibility of Streptococcus pneumoniae and Haemophilus influenzae isolated from middle ear fluid specimens of children aged≤15 years (mean, 2 years), before and after the introduction of the 7-valent pneumococcal conjugate vaccine (PCV7) and the H. influenzae type b vaccine, at a pediatric facility in Japan. Sixty-six S. pneumoniae and 88 H. influenzae strains were isolated from 820 middle ear fluid samples. Serotyping and antimicrobial susceptibility testing were performed...
November 23, 2016: Journal of Infection and Chemotherapy: Official Journal of the Japan Society of Chemotherapy
https://www.readbyqxmd.com/read/27879558/impact-of-pneumococcal-conjugate-vaccines-on-selected-head-and-neck-infections-in-hospitalized-israeli-children
#8
Tal Marom, Shiran Bookstein Peretz, Orna Schwartz, Abraham Goldfarb, Yahav Oron, Sharon Ovnat Tamir
INTRODUCTION: Streptococcus pneumoniae is a major pathogen of pediatric head and neck infections (HNIs), e.g. acute otitis media (AOM), acute mastoiditis (AM), acute bacterial sinusitis (ABS) and meningitis. The aim of the study was to characterize the epidemiology of pneumococcal HNIs (pHNIs) before, during, and after the introduction of pneumococcal conjugate vaccines (PCVs). METHODS: Children 0-16 years who were hospitalized with HNIs in the Pediatrics Department in a general hospital between 1/1/2007-12/31/2014 were retrospectively identified...
November 22, 2016: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/27867430/evaluation-in-mouse-model-of-combined-virus-bacterial-vaccine-based-on-attenuated-influenza-a-h7n3-virus-and-the-group-b-streptococcus-recombinant-polypeptides
#9
Yulia A Desheva, Galina F Leontieva, Tatiana A Kramskaya, Tatiana A Smolonogina, Kornelia B Grabovskaya, Irina V Kiseleva, Larisa G Rudenko, Alexander N Suvorov
BACKGROUND: Secondary bacterial influenza complications are a common cause of excesses morbidity and mortality, which determines the need to develop means for specific prophylaxis. Group B streptococcal infection is especially common cause of pneumonia among children and the elderly with underlying conditions. Here we investigate in a mouse model the effects of combined intranasal immunization using live attenuated influenza vaccine and recombinant polypeptides based on group B Streptococcus surface proteins...
2016: Open Microbiology Journal
https://www.readbyqxmd.com/read/27859014/cord-blood-streptococcus-pneumoniae-specific-cellular-immune-responses-predict-early-pneumococcal-carriage-in-high-risk-infants-in-papua-new-guinea
#10
Jacinta P Francis, Peter C Richmond, Deborah Strickland, Susan L Prescott, William S Pomat, Audrey Michael, Marie A Nadal-Sims, Catherine J Edwards-Devitt, Patrick G Holt, Deborah Lehmann, Anita H J van den Biggelaar
Background In areas where Streptococcus pneumoniae is highly endemic, infants experience very early pneumococcal colonization of the upper respiratory tract with carriage often persisting into adulthood. We aimed to explore whether newborns in high risk areas have pre-existing pneumococcal-specific cellular immune responses that may affect early pneumococcal acquisition. Methods Cord blood mononuclear cells (CBMC) of 84 Papua New Guinean (PNG; high endemic) and 33 Australian (AUS; low endemic) newborns were stimulated in vitro with detoxified pneumolysin (dPly) or pneumococcal surface protein A (PspA; families 1 and 2) and compared for cytokine responses...
November 18, 2016: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/27847379/emergence-of-multidrug-resistant-pneumococcal-serotype-35b-among-u-s-children
#11
Liset Olarte, Sheldon L Kaplan, William J Barson, José R Romero, Philana Ling Lin, Tina Q Tan, Jill A Hoffman, John S Bradley, Laurence B Givner, Edward O Mason, Kristina G Hultén
Streptococcus pneumoniae serotype 35B is a nonvaccine serotype associated with high rates of penicillin nonsusceptibility. An increase in the proportion of multidrug-resistant (MDR) 35B isolates has been recently reported. The genetic events contributing to the emergence of MDR serotype 35B are unknown.The sequence type (ST) composition of 78 serotype 35B isolates obtained from pediatric patients with invasive pneumococcal disease from 1994 to 2014, and 48 isolates from pediatric patients with otitis media (noninvasive) from 2011 to 2014 was characterized by multilocus sequence typing (MLST)...
November 9, 2016: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/27832151/nationwide-trends-in-bacterial-meningitis-before-the-introduction-of-13-valent-pneumococcal-conjugate-vaccine-burkina-faso-2011-2013
#12
Dinanibè Kambiré, Heidi M Soeters, Rasmata Ouédraogo-Traoré, Isaïe Medah, Lassana Sangare, Issaka Yaméogo, Guetawendé Sawadogo, Abdoul-Salam Ouédraogo, Soumeya Hema-Ouangraoua, Lesley McGee, Velusamy Srinivasan, Flavien Aké, Malika Congo-Ouédraogo, Soufian Sanou, Absatou Ky Ba, Ryan T Novak, Chris Van Beneden
BACKGROUND: Following introduction of Haemophilus influenzae type b vaccine in 2006 and serogroup A meningococcal conjugate vaccine in 2010, Streptococcus pneumoniae (Sp) became the leading cause of bacterial meningitis in Burkina Faso. We describe bacterial meningitis epidemiology, focusing on pneumococcal meningitis, before 13-valent pneumococcal conjugate vaccine (PCV13) introduction in the pediatric routine immunization program in October 2013. METHODS: Nationwide population-based meningitis surveillance collects case-level demographic and clinical information and cerebrospinal fluid (CSF) laboratory results...
2016: PloS One
https://www.readbyqxmd.com/read/27832057/announcement-world-pneumonia-day-november-12-2016
#13
(no author information available yet)
November 12th marks the eighth annual World Pneumonia Day, observed to raise awareness of pneumonia as a global public health concern for persons of all ages and a leading infectious cause of death of children aged <5 years, causing approximately 900,000 child deaths annually (1). In the United States, the majority of the 53,000 annual pneumonia deaths occur in persons aged ≥65 years. Respiratory viruses, such as respiratory syncytial virus (RSV) and influenza, and Streptococcus pneumoniae bacteria are among the leading causes of pneumonia; RSV annually causes an average of 177,000 hospitalizations and 14,000 deaths in adults aged ≥65 years in the United States (1,2)...
November 11, 2016: MMWR. Morbidity and Mortality Weekly Report
https://www.readbyqxmd.com/read/27832022/pneumococcal-serotype-5-colonization-prevalence-among-newly-arrived-unaccompanied-children-one-year-after-an-outbreak-texas-2015
#14
Miwako Kobayashi, Lara Misegades, Katherine E Fleming-Dutra, Sana Ahmed, Ryan Gierke, Srinivas Nanduri, Jessica M Healy, Duong Nguyen, Maria da Gloria Carvalho, Fabiana Pimenta, Stephen H Waterman, Matthew R Moore, Curi Kim, Cynthia G Whitney
In 2014, an acute respiratory illness outbreak affected unaccompanied children from Central America entering the US; 9% of 774 surveyed children were colonized with Streptococcus pneumoniae serotype 5. In our 2015 follow-up survey of 475 children, serotype 5 was not detected, and an interim recommendation to administer 13-valent pneumococcal conjugate vaccine to all unaccompanied children was discontinued.
November 8, 2016: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/27830065/streptococcus-pneumoniae-serotype-19a-meningitis-in-well-vaccinated-immunocompetent-13-month-old-child-a-case-of-pcv13-failure
#15
Simon Kayemba-Kay's, Abdul Monem Badran, Cécile Lagneaux, Tamas Kovacs, Anne Heron
We report a 13-month-old immune-competent male child who was diagnosed with pneumococcal serotype 19A meningitis despite having received three PCV13 injections. Clinicians are reminded that bacterial meningitis can still occur, even in correctly vaccinated children. Investigations should include immune system screening along with abdominal ultrasound to exclude asplenia.
November 2016: Clinical Case Reports
https://www.readbyqxmd.com/read/27829063/pneumococcal-carriage-in-children-under-five-years-in-uganda-will-present-pneumococcal-conjugate-vaccines-be-appropriate
#16
Ann Lindstrand, Joan Kalyango, Tobias Alfvén, Jessica Darenberg, Daniel Kadobera, Freddie Bwanga, Stefan Peterson, Birgitta Henriques-Normark, Karin Källander
BACKGROUND: Pneumonia is the major cause of death in children globally, with more than 900,000 deaths annually in children under five years of age. Streptococcus pneumoniae causes most deaths, most often in the form of community acquired pneumonia. Pneumococcal conjugate vaccines (PCVs) are currently being implemented in many low-income countries. PCVs decrease vaccine-type pneumococcal carriage, a prerequisite for invasive pneumococcal disease, and thereby affects pneumococcal disease and transmission...
2016: PloS One
https://www.readbyqxmd.com/read/27806810/childhood-acute-bacterial-meningitis-clinical-spectrum-bacteriological-profile-and-outcome
#17
Attia Bari, Fatima Zeeshan, Aiza Zafar, Hassan Ejaz, Aisha Iftikhar, Ahsan Waheed Rathore
OBJECTIVE: To determine the disease pattern, etiological agents and outcome of childhood acute bacterial meningitis. STUDY DESIGN: Adescriptive study. PLACE AND DURATION OF STUDY: Department of Paediatric Medicine, The Children's Hospital, Lahore, from January to December 2012. METHODOLOGY: Atotal of 199 children between the ages of 1 month and 5 years, admitted with the diagnosis of meningitis on the basis of clinical findings and positive cerebrospinal fluid (CSF), were included...
October 2016: Journal of the College of Physicians and Surgeons—Pakistan: JCPSP
https://www.readbyqxmd.com/read/27798547/streptococcus-pneumoniae-serotypes-and-antibiotic-susceptibility-patterns-in-middle-ear-fluid-isolates-during-acute-otitis-media-and-nasopharyngeal-isolates-during-community-acquired-alveolar-pneumonia-in-central-romania
#18
Raluca-Ileana Lixandru, Cristian Falup-Pecurariu, Laura Bleotu, Alice Mercas, Eugene Leibovitz, Ron Dagan, David Greenberg, Oana Falup-Pecurariu
INTRODUCTION: Streptococcus pneumoniae is a common cause of community-acquired alveolar pneumonia (CAAP) and acute otitis media (AOM) in children. Romania has high rates of S. pneumoniae antibiotic resistance. The pneumococcal conjugated vaccines (PCVs) are not being used routinely in this country. The aims of the study were: 1) To compare pneumococcal antibiotic resistance patterns in AOM and CAAP in children from central Romania; and 2) to compare differences in the distribution of pneumococcal serotypes isolated from the middle ear fluid (MEF) of children with AOM and from the nasopharynx (NP) of children with CAAP...
October 25, 2016: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/27798013/safety-and-immunogenicity-of-a-new-13-valent-pneumococcal-conjugate-vaccine-versus-a-licensed-7-valent-pneumococcal-conjugate-vaccine-a-study-protocol-of-a-randomised-non-inferiority-trial-in-china
#19
Jing Jing Chen, Lin Yuan, Zhen Huang, Nian Min Shi, Yu Liang Zhao, Sheng Li Xia, Guo Hua Li, Rong Cheng Li, Yan Ping Li, Shu Yuan Yang, Jie Lai Xia
INTRODUCTION: The invasive pneumococcal diseases (IPDs) caused by Streptococcus pneumoniae pose an enormous threat to children under 5 years of age. However, routine use of pneumococcal conjugate vaccines could aid in reducing the incidence of IPDs. The purpose of this clinical trial is to assess the non-inferiority of the investigational 13-valent pneumococcal conjugate vaccine (PCV13) to the currently licensed 7-valent pneumococcal conjugate vaccine (PCV7). METHODS AND ANALYSIS: 1040 infants will receive a three-dose series of either PCV13 or PCV7 at ages 3, 4 and 5 months, respectively, and a booster dose at 12-15 months...
October 19, 2016: BMJ Open
https://www.readbyqxmd.com/read/27797408/most-preschool-children-hospitalised-for-acute-rhinosinusitis-had-orbital-complications-and-this-was-more-common-in-younger-children-and-boys
#20
L Schollin Ask, S Hultman Dennison, P Stjärne, A Granath, S Srivastava, M Eriksson, A Lindstrand, M Ryd Rinder
AIM: This study established the incidence of acute rhinosinusitis and related orbital complications in tertiary care in Stockholm County and surveyed the clinical outcomes. METHODS: This was a population-based, retrospective, observational study, from 1 July 2003 to 30 June 2007, of the hospital admissions records of 213 children up to five years old, with a diagnosis of sinusitis and related complications. RESULTS: Preseptal cellulitis was present in 171 of the 213 admissions, which equated to an incidence of orbital complications due to acute rhinosinusitis of 36 per 100,000 people per year (95% confidence interval 26-49)...
October 31, 2016: Acta Paediatrica
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