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Streptococcus pneumoniae in childrens

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https://www.readbyqxmd.com/read/29149199/epidemiology-and-clinical-profile-of-pathogens-responsible-for-the-hospitalization-of-children-in-sousse-area-tunisia
#1
Ines Brini, Aida Guerrero, Naila Hannachi, Jihene Bouguila, Dorothea Orth-Höller, Amira Bouhlel, Lamia Boughamoura, Benjamin Hetzer, Wegene Borena, Britta Schiela, Dorothee Von Laer, Jalel Boukadida, Heribert Stoiber
This study aimed to identify a broad spectrum of respiratory pathogens from hospitalized and not-preselected children with acute respiratory tract infections in the Farhat Hached University-hospital of Sousse, Tunisia. Between September 2013 and December 2014, samples from 372 children aged between 1 month and 5 years were collected, and tested using multiplex real-time RT-PCR by a commercial assay for 21 respiratory pathogens. In addition, samples were screened for the presence of Streptococcus pneumoniae 16S rDNA using real-time PCR...
2017: PloS One
https://www.readbyqxmd.com/read/29121208/dynamics-of-bacterial-colonization-with-streptococcus-pneumoniae-haemophilus-influenzae-and-moraxella-catarrhalis-during-symptomatic-and-asymptomatic-viral-upper-respiratory-infection
#2
Gregory P DeMuri, James E Gern, Jens C Eickhoff, Susan V Lynch, Ellen R Wald
Background: Virus is detected in about 80% of upper respiratory tract infections (URIs) in children and is also detectable in the nasopharynx of 30% of asymptomatic children. The effect of asymptomatic viral infection on the dynamics of bacterial density and colonization of the nasopharynx has not been reported. Objective: To assess the presence and density of Streptococcus pneumoniae, Haemophilus influenzae and Moraxella catarrhalis in the nasopharynx of 4 to 7 year old children during URI and when well...
November 7, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29119074/case-report-on-a-defective-antibody-response-against-pneumococcal-serotype-9v-in-a-patient-with-a-single-episode-of-pneumonia
#3
Diana van Kessel, Thijs Hoffman, Heleen van Velzen-Blad, Bob Meek, Suzan van Mens, Jan Grutters, Ger Rijkers
Background: Patients with recurrent respiratory tract infections and an impaired response to pneumococcal polysaccharide vaccination are diagnosed with a specific antibody deficiency. In adult patients with pneumococcal pneumonia an impaired antibody response to the infecting pneumococcal serotype can sometimes be found. It is unknown whether these patients are unable to produce an adequate anti-polysaccharide antibody response to pneumococcal vaccination after recovery. Case presentation: The authors describe a case of invasive pneumonia caused by Streptococcus pneumoniae serotype 9V in a previously healthy 35-year-old female...
2017: Pneumonia
https://www.readbyqxmd.com/read/29118167/invasive-disease-caused-simultaneously-by-dual-serotypes-of-streptococcus-pneumoniae
#4
Kedibone Ndlangisa, Mignon du Plessis, Mushal Allam, Nicole Wolter, Linda de Gouveia, Keith P Klugman, Cheryl Cohen, Rebecca A Gladstone, Anne von Gottberg
There are at least 98 known pneumococcal serotypes. Invasive pneumococcal (IPD) disease is usually caused by a single serotype, and dual serotype IPD is rare. To assess factors associated with dual serotype IPD, patient information obtained through laboratory-based surveillance for IPD from 2005 through 2014 in South Africa was reviewed. Genomes of isolate pairs from co-infected individuals were sequenced to determine their molecular characteristics. For 30 (91%) of 33 patients with dual serotypes, one or both isolates were a pneumococcal conjugate vaccine (PCV13) serotype...
November 8, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/29113587/streptococcus-pneumoniae-burden-and-nasopharyngeal-inflammation-during-acute-otitis-media
#5
Matthew C Morris, Michael E Pichichero
Streptococcus pneumoniae (Spn) is a common respiratory pathogen and a frequent cause of acute otitis media (AOM) in children. The first step in bacterial pathogenesis of AOM is the establishment of asymptomatic colonization in the nasopharynx. We studied Spn bacterial burden in conjunction with neutrophil recruitment and inflammatory gene transcription and cytokine secretion in samples of nasal wash collected from normal and otitis-prone children during health, viral upper respiratory infection without middle ear involvement (URI) and AOM...
November 2017: Innate Immunity
https://www.readbyqxmd.com/read/29096010/macrolides-in-children-with-community-acquired-pneumonia-panacea-or-placebo
#6
Christopher C Blyth, Jeffrey S Gerber
Pneumonia, most often caused by a respiratory virus, is common in childhood. Mycoplasma pneumoniae also is detected frequently, particularly in older children in the era of pneumococcal conjugate vaccination. Despite recommendations for β-lactam antibiotics, macrolide antibiotics, including erythromycin, clarithromycin, and azithromycin, are prescribed frequently to children with acute lower respiratory infection. However, the significance of detecting "atypical" pathogens, including M pneumoniae, in children remains contentious...
October 31, 2017: Journal of the Pediatric Infectious Diseases Society
https://www.readbyqxmd.com/read/29089242/first-description-of-a-catalase-negative-staphylococcus-aureus-from-a-healthy-carrier-with-a-novel-nonsense-mutation-in-the-kata-gene
#7
Krisztina Laub, Katalin Kristóf, Tamás Tirczka, Adrienn Tóthpál, Szilvia Kardos, Eszter Kovács, Judit Sahin-Tóth, Andrea Horváth, Orsolya Dobay
We have screened 2568 healthy individuals (mostly children) for Staphylococcus aureus and Streptococcus pneumoniae nasal carriage between 2010 and 2012. Out of the isolated 751 S. aureus strains, we found one methicillin-sensitive catalase-negative S. aureus (CNSA). Our CNSA isolate possessed a novel nonsense point mutation in the katA gene leading to early truncation of the protein product. The strain was resistant to penicillin and erythromycin, but sensitive to all other tested antibiotics and carried the enterotoxin A gene...
October 26, 2017: International Journal of Medical Microbiology: IJMM
https://www.readbyqxmd.com/read/29077699/pneumococcal-conjugate-vaccine-and-pneumonia-prevention-in-children-with-congenital-heart-disease
#8
Fortino Solórzano-Santos, Lilia Espinoza-García, Glorinella Aguilar-Martínez, Luisa Beirana-Palencia, Gabriela Echániz-Avilés, Guadalupe Miranda-Novales
BACKGROUND: A successful strategy to prevent Streptococcus pneumoniae infections is the administration of pneumococcal conjugate vaccines (PCVs). OBJECTIVE: To analyze the effectiveness of the 7- and 13-valent PCV for the prevention of all-cause pneumonia. MATERIALS AND METHODS: A retrospective cohort of children younger than 5 years of age, with congenital heart disease (CHD) and different vaccination schedules, was analyzed. History of vaccination was confirmed with verifiable records...
September 2017: Revista de Investigación Clínica; Organo del Hospital de Enfermedades de la Nutrición
https://www.readbyqxmd.com/read/29076932/evaluation-of-the-clinical-utility-of-a-real-time-pcr-assay-for-the-diagnosis-of-streptococcus-pneumoniae-bacteremia-in-children-a-retrospective-diagnostic-accuracy-study
#9
Jane Murphy, Sadhbh O' Rourke, Mary Corcoran, Nicola O' Sullivan, Robert Cunney, Richard Drew
BACKGROUND: The widespread uptake of pneumococcal vaccines has substantially reduced the incidence of invasive pneumococcal disease, such that pneumococcal bacteremia in children is now considered a relatively rare event. The objective of this study was to ascertain the clinical utility of a Streptococcus pneumoniae real-time PCR assay compared with standard blood culture for the diagnosis of pneumococcal bacteremia in children in the post-vaccine era. METHODS: A systematic retrospective review of laboratory and patient records from Children's University Hospital, Temple Street during a 6 year period was performed...
October 25, 2017: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/29071076/burden-of-bacterial-upper-respiratory-tract-pathogens-in-school-children-of-nepal
#10
Sangita Thapa, Shishir Gokhale, Annavarapu Laxminarasimha Sharma, Lokendra Bahadur Sapkota, Shamshul Ansari, Rajendra Gautam, Sony Shrestha, Puja Neopane
INTRODUCTION: Respiratory tract infections are one of the most common human infections in all age group and important cause of mortality and morbidity worldwide. Most bacterial upper respiratory tract infections are vaccine preventable. This study aimed to determine the prevalence of carrier state of bacterial upper respiratory tract pathogens among school children. It also aimed to study their antibiograms. METHODS: The specimen from posterior pharyngeal wall and tonsils were collected from 204 participants on calcium alginate coated swabs (HiMedia)...
2017: BMJ Open Respiratory Research
https://www.readbyqxmd.com/read/29069315/the-impact-of-pneumococcal-vaccination-on-bacterial-and-viral-pneumonia-in-western-australian-children-record-linkage-cohort-study-of-469-589-births-1996-2012
#11
Parveen Fathima, Christopher C Blyth, Deborah Lehmann, Faye J Lim, Tasnim Abdalla, Nicholas de Klerk, Hannah C Moore
Background: Pneumococcal conjugate vaccine (PCV) was included in Australia's National Immunisation Program for all children from 2005. We assessed the impact of PCV on all-cause and pathogen-specific pneumonia hospitalisations in Western Australian (WA) children aged ≤16 years. Methods: All hospitalisations with pneumonia-related ICD-10AM diagnosis codes occurring in WA-born children (1996-2012) were linked to pathology records. Age-specific incidence rate ratios and temporal trends for all-cause and pathogen-specific pneumonia hospitalisations were calculated pre- and post-PCV introduction...
October 23, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29043423/preliminary-report-from-the-world-health-organisation-chest-radiography-in-epidemiological-studies-project
#12
REVIEW
Nasreen Mahomed, Nicholas Fancourt, John de Campo, Margaret de Campo, Aliu Akano, Thomas Cherian, Olivia G Cohen, David Greenberg, Stephen Lacey, Neera Kohli, Henrique M Lederman, Shabir A Madhi, Veronica Manduku, Eric D McCollum, Kate Park, Jose Luis Ribo-Aristizabal, Naor Bar-Zeev, Katherine L O'Brien, Kim Mulholland
Childhood pneumonia is among the leading infectious causes of mortality in children younger than 5 years of age globally. Streptococcus pneumoniae (pneumococcus) is the leading infectious cause of childhood bacterial pneumonia. The diagnosis of childhood pneumonia remains a critical epidemiological task for monitoring vaccine and treatment program effectiveness. The chest radiograph remains the most readily available and common imaging modality to assess childhood pneumonia. In 1997, the World Health Organization Radiology Working Group was established to provide a consensus method for the standardized definition for the interpretation of pediatric frontal chest radiographs, for use in bacterial vaccine efficacy trials in children...
October 2017: Pediatric Radiology
https://www.readbyqxmd.com/read/29043417/community-acquired-pneumonia-in-children-a-changing-spectrum-of-disease
#13
REVIEW
David M le Roux, Heather J Zar
Pneumonia remains the leading cause of death in children outside the neonatal period, despite advances in prevention and management. Over the last 20 years, there has been a substantial decrease in the incidence of childhood pneumonia and pneumonia-associated mortality. New conjugate vaccines against Haemophilus influenzae type b and Streptococcus pneumoniae have contributed to decreases in radiologic, clinical and complicated pneumonia cases and have reduced hospitalization and mortality. The importance of co-infections with multiple pathogens and the predominance of viral-associated disease are emerging...
October 2017: Pediatric Radiology
https://www.readbyqxmd.com/read/29034852/comparison-of-direct-plating-and-broth-enrichment-culture-methods-for-detection-of-potential-bacterial-pathogens-in-respiratory-secretions
#14
Ravinder Kaur, Jareth Wischmeyer, Matthew Morris, Michael E Pichichero
OBJECTIVE: We compared the recovery of potential respiratory bacterial pathogens and normal flora from nasopharyngeal specimens collected from children during health and at the onset of acute otitis media (AOM) by selective direct-plating and overnight broth-enrichment. METHODS: Overall, 3442 nasal wash (NW) samples collected from young children were analysed from a 10-year prospective study. NWs were cultured by (1) direct-plating to TSAII/5 % sheep blood agar and chocolate agar plates and (2) overnight broth-enrichment in BacT/ALERT SA-broth followed by plating...
October 16, 2017: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/29032897/prevnar-13-vaccine-failure-in-a-mouse-model-for-vitamin-a-deficiency
#15
Rhiannon R Penkert, Amy Iverson, Jason W Rosch, Julia L Hurwitz
Streptococcus pneumoniae (pneumococcus) is responsible for serious pediatric respiratory infections, and kills close to one million children under the age of five each year. Unfortunately, the Prevnar-13 vaccine (PCV-13) that is used to protect children from the serious consequences of pneumococcus infections is not always successful. Given that vitamin A deficiency (VAD) is known to affect children in both developed and developing countries, we asked if VAD could be responsible, at least in part, for PCV-13 vaccine failures...
November 1, 2017: Vaccine
https://www.readbyqxmd.com/read/29027126/etiology-and-risk-factors-determining-poor-outcome-of-severe-pneumonia-in-under-five-children
#16
Suresh Kumar Jakhar, Mukul Pandey, Dheeraj Shah, V G Ramachandran, Rumpa Saha, Natasha Gupta, Piyush Gupta
OBJECTIVES: To determine the etiology of severe pneumonia (pneumonia with chest indrawing) in under-five children, and to study the risk factors for poor outcomes viz., 'treatment failure', 'need for change in antibiotics', 'prolonged hospital stay', 'need for mechanical ventilation' and 'mortality.' METHODS: Children (age 2 mo to 5 y) with pneumonia and chest drawing were enrolled prospectively from October 2012 through September 2013. Clinical history was recorded, and examination, anthropometry and investigations (including chest X-ray, blood culture and nasopharyngeal swab culture) were performed...
October 13, 2017: Indian Journal of Pediatrics
https://www.readbyqxmd.com/read/29027028/determination-of-avidity-of-igg-against-protein-antigens-from-streptococcus-pneumoniae-assay-development-and-preliminary-application-in-clinical-settings
#17
D C Andrade, I C Borges, N Ekström, T Jartti, T Puhakka, A Barral, H Kayhty, O Ruuskanen, C M Nascimento-Carvalho
The measurement of antibody levels is a common test for the diagnosis of Streptococcus pneumoniae infection in research. However, the quality of antibody response, reflected by avidity, has not been adequately evaluated. We aimed to evaluate the role of avidity of IgG against eight pneumococcal proteins in etiologic diagnosis. Eight pneumococcal proteins (Ply, CbpA, PspA1 and 2, PcpA, PhtD, StkP-C, and PcsB-N) were used to develop a multiplex bead-based avidity immunoassay. The assay was tested for effects of the chaotropic agent, multiplexing, and repeatability...
October 12, 2017: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/29020313/trends-in-invasive-pneumococcal-disease-ipd-in-cancer-patients-after-the-introduction-of-7-valent-pneumococcal-conjugate-vaccine-pcv7-a-20-year-longitudinal-study-at-a-major-urban-cancer-center
#18
Yeon Joo Lee, Yao-Ting Huang, Seong Jin Kim, Marina Kerpelev, Victoria Gonzalez, Anna Kaltsas, Genovefa Papanicolaou
Background: Rates of invasive pneumococcal disease (IPD) declined since routine childhood immunization with the 7-valent pneumococcal conjugate vaccine (PCV7) in 2000. We studied the impact of PCV7 on the incidence of IPD in cancer patients. Methods: This was a retrospective analysis of adult and pediatric patients treated at Memorial Sloan Kettering Cancer Center from 1992 to 2012. Recovery of Streptococcus pneumoniae from a sterile site defined IPD. IPD incidence was calculated as cases per 1,000 unique patient-visits per year (UPV)...
August 17, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29020218/pan-serotype-reduction-in-progression-of-streptococcus-pneumoniae-to-otitis-media-after-rollout-of-pneumococcal-conjugate-vaccines
#19
Joseph A Lewnard, Noga Givon-Lavi, Daniel M Weinberger, Marc Lipsitch, Ron Dagan
Background: Reductions in otitis media (OM) burden following rollout of pneumococcal conjugate vaccines (PCVs) have exceeded predictions of vaccine impact. In settings with active surveillance, reductions in OM caused by vaccine-targeted pneumococcal serotypes have co-occurred with reductions in OM caused by other pathogens carried in the upper-respiratory tract of children. To understand these changes, we investigated the progression of vaccine-targeted and non-vaccine pneumococcal serotypes from carriage to OM before and after vaccine rollout...
July 29, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28991319/-etiology-and-evolution-of-the-osteoarticular-infections-2009-2015-pediatric-hospital-pereira-rossell-uruguay
#20
Carlos Zuníno, Alejandra Vomero, Soledad Pandolfo, Claudia Gutiérrez, Gabriela Algorta, M Catalina Pírez, Gustavo Giachetto
BACKGROUND: The most frequent osteoarticular infections (OAI) etiological agent is Staphylococcus aureus. The prevalence of other microorganisms has changed after the introduction of new vaccines. AIM: To describe the etiology and evolution of the OAIs in children hospitalized in Pediatric Hospital Pereira Rossell between 2009 and 2015. PATIENTS AND METHODS: Joint fluid and bone puncture studies of hospitalized children suspected of OAI. Epidemiological characteristics, isolated microorganisms, complementary tests, initial treatment, complications, and days of hospitalization were analyzed...
June 2017: Revista Chilena de Infectología: órgano Oficial de la Sociedad Chilena de Infectología
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