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https://www.readbyqxmd.com/read/29449834/peptidoglycan-recognition-protein-3-does-not-alter-the-outcome-of-pneumococcal-pneumonia-in-mice
#1
Anshu Shrivastav, Alexander N Dabrowski, Claudia Conrad, Nelli Baal, Holger Hackstein, Stephanie Plog, Kristina Dietert, Achim D Gruber, Philippe D N'Guessan, Sahar Aly, Norbert Suttorp, Janine Zahlten
Pneumococci frequently cause community-acquired pneumonia, a disease with high mortality rates, particularly in young children and in the elderly. Endogenous antimicrobial peptides and proteins such as PGLYRP3 may contribute to the progression and outcome of this disease. Since increasing antibiotic resistant strains occur all over the world, these endogenous antimicrobial molecules are interesting new targets for future therapies. In this study, the expression pattern of PGLYRP3 was analyzed in alveolar epithelial cells, alveolar macrophages and neutrophils...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29448981/treatment-and-prevention-of-invasive-pneumococcal-disease
#2
A R Domínguez-Alegría, V Pintado, I Barbolla
Invasive pneumococcal disease is a severe infection that mainly affects patients with associated comorbidity. The paediatric conjugate vaccination has resulted in a change in the adult vaccination strategy. The antibiotic resistance of pneumococcus is not currently a severe problem. Nevertheless, the World Health Organisation has included pneumococcus among the bacteria whose treatment requires the introduction of new drugs, such as ceftaroline and ceftobiprole. Although the scientific evidence is still limited, the combination of beta-lactams and macrolides is recommended as empiric therapy for bacteraemic pneumococcal pneumonia...
February 12, 2018: Revista Clínica Española
https://www.readbyqxmd.com/read/29448938/comparative-genomic-analysis-of-ten-clinical-streptococcus-pneumoniae-collected-from-a-malaysian-hospital-reveal-31-new-unique-drug-resistant-snps-using-whole-genome-sequencing
#3
Hassan Mahmood Jindal, Babu Ramanathan, Cheng Foh Le, Ranganath Gudimella, Rozaimi Razali, Rishya Manikam, Shamala Devi Sekaran
BACKGROUND: Streptococcus pneumoniae or pneumococcus is a leading cause of morbidity and mortality worldwide, specifically in relation to community-acquired pneumonia. Due to the overuse of antibiotics, S. pneumoniae has developed a high degree of resistance to a wide range of antibacterial drugs. METHODS: In this study, whole genome sequencing (WGS) was performed for 10 clinical strains of S. pneumoniae with different levels of sensitivity to standard antibiotics...
February 15, 2018: Journal of Biomedical Science
https://www.readbyqxmd.com/read/29447284/influenza-interaction-with-cocirculating-pathogens-and-its-impact-on-surveillance-pathogenesis-and-epidemic-profile-a-key-role-for-mathematical-modelling
#4
REVIEW
Lulla Opatowski, Marc Baguelin, Rosalind M Eggo
Evidence is mounting that influenza virus interacts with other pathogens colonising or infecting the human respiratory tract. Taking into account interactions with other pathogens may be critical to determining the real influenza burden and the full impact of public health policies targeting influenza. This is particularly true for mathematical modelling studies, which have become critical in public health decision-making. Yet models usually focus on influenza virus acquisition and infection alone, thereby making broad oversimplifications of pathogen ecology...
February 2018: PLoS Pathogens
https://www.readbyqxmd.com/read/29436406/management-of-suspected-paediatric-meningitis-a-multicentre-prospective-cohort-study
#5
Roshan Ramasamy, Louise Willis, Seilesh Kadambari, Dominic F Kelly, Paul T Heath, Simon Nadel, Andrew J Pollard, Manish Sadarangani
OBJECTIVE: To quantify delays during management of children with suspected meningitis. DESIGN: Multicentre prospective cohort study. SETTING: Three UK tertiary paediatric centres; June 2011-June 2012 PATIENTS: 388 children aged <16 years hospitalised with suspected meningitis or undergoing lumbar puncture (LP) during sepsis evaluation. MAIN OUTCOME MEASURES: Time of prehospital and in-hospital assessments, LP, antibiotic treatment and discharge; types of prehospital medical assessment and microbiological results...
February 7, 2018: Archives of Disease in Childhood
https://www.readbyqxmd.com/read/29387550/case-report-guillain-barre-syndrome-with-pneumococcus-a-new-association-in-pediatrics
#6
Hassan El Khatib, Amal Naous, Soha Ghanem, Ghassan Dbaibo, Mariam Rajab
Guillain-Barre Syndrome, an acute flaccid paralysis known to be caused by recent Gastro-intestinal infections mainly campylobacter, and Respiratory infections mainly mycoplasma pneumoniae and influenza. One reported case of severe invasive pneumococcal disease in a 68 year old female, that presented with Austrian's triad of meningitis, pneumonia and endocarditis, and progressed to develop Guillain Barre syndrome, an association never been documented before. We present a case of 13 year old male, presented with hypoactivity and inability to bare his own weight, developed septic shock due to pneumococcus with Acute Respiratory Distress Syndrome, and was found to have neurological findings of Guillain-Barre Syndrome...
2018: IDCases
https://www.readbyqxmd.com/read/29384667/effects-of-simulated-smog-atmospheres-in-rodent-models-of-metabolic-and-immunologic-dysfunction
#7
Marie McGee Hargrove, Samantha J Snow, Robert W Luebke, Charles E Wood, Jonathan Krug, Q Todd Krantz, Charly King, Carey Copeland, Shaun D McCullough, Kymberly M Gowdy, Urmila Kodavanti, M Ian Gilmour, Stephen Gavett
Air pollution is a diverse and dynamic mixture of gaseous and particulate matter, limiting our understanding of associated adverse health outcomes. The biological effects of two simulated smog atmospheres (SA) with different compositions but similar air quality health indexes were compared in a non-obese diabetic rat model (Goto-Kakizaki, GK) and three mouse immune models (house dust mite (HDM) allergy, antibody response to heat-killed pneumococcus, and resistance to influenza A infection). In GK rats, both SA-PM (high particulate matter) and SA-O3 (high ozone) decreased cholesterol levels immediately after a 4-hour exposure, whereas only SA-O3 increased airflow limitation...
January 31, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29369425/roles-of-amphipathicity-and-hydrophobicity-in-the-micelle-driven-structural-switch-of-a-14-mer-peptide-core-from-a-choline-binding-repeat
#8
Hector Zamora-Carreras, Beatriz Maestro, Erik Strandberg, Anne S Ulrich, Jesús M Sanz, M Angeles Jimenez
Choline-binding repeats (CBRs) are ubiquitous sequences with a β-hairpin core that are found in the surface proteins of several microorganisms such as S. pneumoniae (pneumococcus). Previous studies on a 14-mer CBR sequence derived from the pneumoccal LytA autolysin (LytA₂₃₉-₂₅₂ peptide) have demonstrated a switch behaviour for this peptide, so that it acquires a stable, native-like β-hairpin conformation in aqueous solution but is reversibly transformed into an amphipathic α-helix in the presence of detergent micelles...
January 25, 2018: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29364418/-antibiotic-resistance-and-distribution-of-serotypes-of-invasive-pneumococcal-strains-isolated-from-hospitalized-adults-in-lima-peru
#9
Juan D Castro, Sofía M Siccha, Martha Egoavil, Eduardo Chaparro, Roger Hernandez, Wilda Silva, Olguita Del Águila, Andrés Saenz, Francisco Campos, Isabel Reyes, María E Castillo, Theresa J Ochoa
OBJECTIVES.: To describe the clinical characteristics, antibiotic resistance, and distribution of serotypes of bacterial strains that cause invasive pneumococcal disease (IPD) in adults. MATERIALS AND METHODS.: Case series. Pneumococcal strains were isolated from 2009 to 2011 from hospitalized adult patients with IPD in five hospitals and two laboratories located in Lima. RESULTS.: The analysis of data from 43 patients with IPD indicated that 58...
October 2017: Revista Peruana de Medicina Experimental y Salud Pública
https://www.readbyqxmd.com/read/29342498/patient-reminder-and-recall-interventions-to-improve-immunization-rates
#10
REVIEW
Julie C Jacobson Vann, Robert M Jacobson, Tamera Coyne-Beasley, Josephine K Asafu-Adjei, Peter G Szilagyi
BACKGROUND: Immunization rates for children and adults are rising, but coverage levels have not reached optimal goals. As a result, vaccine-preventable diseases still occur. In an era of increasing complexity of immunization schedules, rising expectations about the performance of primary care, and large demands on primary care providers, it is important to understand and promote interventions that work in primary care settings to increase immunization coverage. One common theme across immunization programs in many nations involves the challenge of implementing a population-based approach and identifying all eligible recipients, for example the children who should receive the measles vaccine...
January 18, 2018: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/29342160/expression-of-the-lux-genes-in-streptococcus-pneumoniae-modulates-pilus-expression-and-virulence
#11
Jenny A Herbert, Andrea M Mitchell, Ryan Ritchie, Jiangtao Ma, Kirsty Ross-Hutchinson, Timothy J Mitchell
Bioluminescence has been harnessed for use in bacterial reporter systems and for in vivo imaging of infection in animal models. Strain Xen35, a bioluminescent derivative of Streptococcus pneumoniae serotype 4 strain TIGR4 was previously constructed for use for in vivo imaging of infections in animal models. We have shown that strain Xen35 is less virulent than its parent TIGR4 and that this is associated with the expression of the genes for bioluminescence. The expression of the luxA-E genes in the pneumococcus reduces virulence and down regulates the expression of the pneumococcal pilus...
2018: PloS One
https://www.readbyqxmd.com/read/29337400/immunization-in-end-stage-renal-disease-the-perception-of-waiting-list-patients
#12
L F Camargo, A M Lother, M Mazzali, R S B Stucchi
BACKGROUND: The number of patients with chronic kidney disease is increasing worldwide, as well as the number of patients in kidney transplant waiting lists. In order to prevent infections related to immunosuppressive therapy, immunization guidelines for CKD patients before transplantation have been proposed. The aim of the present study was to evaluate adherence to immunization in a cohort of CKD patients in transplant waiting list and their renal replacement therapy clinics. METHODS: CKD patients older than 18 years old, receiving renal replacement therapy longer than12 months and included in kidney transplant waiting list at University of Campinas (Unicamp) were enrolled...
January 16, 2018: Transplant Infectious Disease: An Official Journal of the Transplantation Society
https://www.readbyqxmd.com/read/29329755/detection-of-xisco-gene-for-identification-of-streptococcus-pneumoniae-isolates
#13
Francisco Salvà-Serra, Gwendolyn Connolly, Edward R B Moore, Lucia Gonzales-Siles
We describe a PCR-assay differentiating Streptococcus pneumoniae from closely-related species of the Mitis group of the genus Streptococcus and identification of pneumococcus clinical isolates, based on the "Xisco" gene discriminatory marker. The complete "Xisco" gene sequence was observed in all S. pneumoniae genomes analyzed and absent in all non-pneumococcus genomes.
December 15, 2017: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/29318106/pneumococcal-vaccination-in-older-persons-where-are-we-today
#14
REVIEW
Paul Van Buynder, Robert Booy
Disease due to Streptococcus pneumoniae, the pneumococcus, remains a major source of illness in older persons. Globally, it remains the most important pathogen in respiratory infection deaths. Conjugated pneumococcal vaccines are used extensively in national pediatric programs, whereas a polysaccharide vaccine is used in all age groups, but mainly in the elderly and for high-risk groups. Recent data from the Netherlands led to the licensing in many countries of conjugated pneumococcal vaccines for older persons...
2018: Pneumonia
https://www.readbyqxmd.com/read/29311231/capsule-prolongs-survival-of-streptococcus-pneumoniae-during-starvation
#15
Shigeto Hamaguchi, M Ammar Zafar, Michael Cammer, Jeffrey N Weiser
Person-to-person transmission of Streptococcus pneumoniae (the pneumococcus) may occur via environmental sources in close contact with carriers. Pneumococcal polysaccharide capsules, the determinant of serotype (or type), are heterogeneous in structure and amount and these differences affect rates of transmission. In this study, we examined the contribution of capsule and its variations to the maintenance of pneumococcal viability under starvation conditions. S. pneumoniae retained its ability to colonize infant mice even after incubation for 24hrs in PBS at 25°C...
January 8, 2018: Infection and Immunity
https://www.readbyqxmd.com/read/29302645/community-acquired-pneumococcal-pneumonia-in-northwestern-nigeria-epidemiology-antimicrobial-resistance-and-outcome
#16
Garba Iliyasu, Farouq Dayyab Mohammad, Abdulrazaq Garba Habib
Background: Pneumococcus is the leading cause of community acquired pneumonia (CAP) worldwide, and the leading cause of mortality. Pneumococcal pneumonia is poorly studied in Nigeria. We describe the epidemiology including associated co-morbidities and outcome of pneumococcal pneumonia in North-western Nigeria. Material and methods: We conducted a prospective, hospital based study on patients with community acquired pneumococcal pneumonia. Detailed clinical evaluation and relevant laboratory investigations were carried out...
2018: African Journal of Infectious Diseases
https://www.readbyqxmd.com/read/29290490/-suboptimal-care-and-severe-bacterial-infection-in-the-french-caribbean-area
#17
E Goisque, E Launay, B Vrignaud, E Jolivet, F Henaff, C Gras-Leguen
OBJECTIVE: To study the frequency and types of suboptimal care in initial management of children suffering from a severe bacterial infection (SBI), in a French region where little is known about pediatric SBI epidemiology. METHOD: Retrospective single-center study over a 6-year period. Children between 3 months and 15 years of age, deceased or surviving and admitted to the pediatric intensive care unit of the university-affiliated hospital of Martinique for a community-onset SBI were included in this study...
December 28, 2017: Archives de Pédiatrie: Organe Officiel de la Sociéte Française de Pédiatrie
https://www.readbyqxmd.com/read/29290234/bacterial-meningitis-antibiotic-treatment
#18
R Cohen, J Raymond, L Hees, D Pinquier, E Grimprel, C Levy
The implementation of pneumococal conjugate vaccines (PCVs) 7 then 13 valent (Prevenar13®) in 2010-2011 has significantly changed the profile of pneumococcal meningitis. Since 3 years, the National Pediatric Meningitis Network of the Pediatric Infectious Disease Group (GPIP) and the National Reference Centre of Pneumococci have reported no cases of meningitis due to pneumococcus resistant to third-generation cephalosporins (3GC): cefotaxime or ceftriaxone. In the light of these new data, vancomycin should no longer be prescribed at the initial phase of pneumococcal meningitis treatment (confirmed or only suspected) and this antibiotic should only be added when 3GC minimum inhibitory concentration of the strain isolated is greater than 0...
December 2017: Archives de Pédiatrie: Organe Officiel de la Sociéte Française de Pédiatrie
https://www.readbyqxmd.com/read/29290229/antibiotic-treatment-of-lower-respiratory-tract-infections
#19
R Cohen, F Angoulvant, S Biscardi, F Madhi, F Dubos, Y Gillet
Lower respiratory tract infections, i.e., bronchitis, bronchiolitis, and pneumonia, are the second leading cause of antibiotic prescriptions. The vast majority of these infections are due to viruses and are self-limited diseases: most patients recover spontaneously. These two facts explain that antibiotic prescriptions must be limited to some clinical situations for which the diagnosis has to be done early. The first message of this manuscript is to strengthen non-antibiotic prescriptions in many situations such as bronchitis and bronchiolitis...
December 2017: Archives de Pédiatrie: Organe Officiel de la Sociéte Française de Pédiatrie
https://www.readbyqxmd.com/read/29277475/subtractive-genome-analysis-for-in-silico-identification-and-characterization-of-novel-drug-targets-in-streptococcus-pneumonia-strain-jja
#20
Abdul Wadood, Alam Jamal, Muhammad Riaz, Ajmal Khan, Reaz Uddin, Musharraf Jelani, Syed Sikander Azam
Streptococcus pneumoniae (pneumococcus) is a Gram-positive bacterium. Humans are the major target for the pneumococcus. The pneumococcus is a common etiological agent of many different diseases such as bacterial meningitis, pneumonia, otitis media (OM), sinusitis, and conjunctivitis. According to the WHO, the pneumococcus is responsible for causing 1 million deaths each year. In 2000, over 14 million children worldwide under the age of 5 years were diagnosed with a pneumococcal disease, with the highest incidence seen in Africa...
December 22, 2017: Microbial Pathogenesis
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