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Group B streptococcus

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https://www.readbyqxmd.com/read/28736993/molecular-characterization-of-streptococcus-pneumoniae-particularly-serotype19a-st320-that-emerged-in-krasnoyarsk-russia
#1
Irina N Protasova, Tsai-Wen Wan, Natalya V Bakhareva, Wei-Chun Hung, Wataru Higuchi, Yasuhisa Iwao, Tatyana A Yelistratova, Natalya A Ilyenkova, Yelena S Sokolovskaya, Galina P Martynova, Ivan V Reva, Galina V Reva, Sergey V Sidorenko, Lee-Jene Teng, Olga V Peryanova, Alla B Salmina, Tatsuo Yamamoto
Streptococcus pneumoniae, a common human pathogen, colonizes the nasopharynx and causes diseases including acute otitis media (AOM). We herein report pneumococcal serotype distributions in children before and after PCV7 vaccination and in patients with pneumococcal disease in Siberian Russia (Krasnoyarsk). Analyses included antimicrobial susceptibility testing, ST typing, a pulsed-field gel electrophoresis analysis, virulence-related surface protein gene (VSG) typing with novel primers, and a structural analysis by scanning electron microscopy...
July 23, 2017: Microbiology and Immunology
https://www.readbyqxmd.com/read/28736198/characterization-of-streptococcus-pneumoniae-invasive-serotype-19a-isolates-from-argentina-1993-2014
#2
Paula Gagetti, Diego Faccone, Vanesa Reijtman, Sofia Fossati, Marisa Rodriguez, Omar Veliz, Paola Ceriana, Mabel Regueira, Alejandra Corso
The aim of this study was to characterize Streptococcus pneumoniae serotype 19A isolates causing invasive pneumococcal disease in children, collected in Argentina between 1993 and 2014. A total of 176 isolates serotype 19A were analyzed. There was an increase in the proportion of serotype 19A isolates from 3% in 1993 to 6% in 2011, prior to the introduction of PCV13 in 2012, and from 2012 to 2014 its proportion gradually decreased. Penicillin resistance among serotype 19A isolates throughout the study period was 65...
July 20, 2017: Vaccine
https://www.readbyqxmd.com/read/28732495/carriage-and-serotype-distribution-of-streptococcus-agalactiae-in-third-trimester-pregnancy-in-southern-ghana
#3
Hans-Christian Slotved, Nicholas T K D Dayie, Josephine A N Banini, Niels Frimodt-Møller
BACKGROUND: The aim of this study was to determine the prevalence of Streptococcus agalactiae (group B streptococci, GBS) among healthy, pregnant women attending antenatal care at different study sites in the Greater Accra Region, Ghana. METHODS: Between 2010 and June 2013, recto-vaginal swab samples were collected from pregnant women attending antenatal care from two study sites in southern Ghana. The samples were collected within 35 and 37 weeks of the gestation period...
July 21, 2017: BMC Pregnancy and Childbirth
https://www.readbyqxmd.com/read/28735056/distribution-of-macrolide-resistance-mechanisms-in-bulgarian-clinical-isolates-of-streptococcus-pyogenes-during-the-years-of-2013-2016
#4
Adile A Muhtarova, Raina T Gergova, Ivan G Mitov
Streptococcus pyogenes, or group A streptococcus (GAS), is the main etiological agent of bacterial tonsillopharyngitis and a common cause of a wide variety of other mild to severe infections. OBJECTIVES: of the present study was to determine and evaluate the distribution of genetic mechanisms associated with certain phenotypes of macrolide resistance in Bulgarian GAS isolated during the years of 2013-2016. METHODS: All GAS strains were screened for the macrolide resistance genes erm(A), erm(B) and mef(A), using multiplex polymerase chain reaction (PCR)...
July 19, 2017: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/28735054/linezolid-activity-against-clinical-gram-positive-cocci-with-advanced-antimicrobial-drug-resistance-in-iran
#5
Hamidreza Houri, Hossein Kazemian, Hadi Sedigh Ebrahim-Saraie, Asieh Taji, Zahra Tayebi, Hamid Heidari
OBJECTIVES: The aim of the study was to investigate the linezolid activity against clinical Gram-positive cocci with advanced antimicrobial drug resistance. METHODS: A collection of methicillin resistant Staphylococcus aureus (MRSA), vancomycin resistant enterococci (VRE), penicillin non-susceptible Streptococcus pneumoniae (PNSP), and group B streptococci (GBS) were isolated from various clinical samples. Antimicrobial susceptibility tests were done using standard methods Subsequently, we investigated linezolid antibacterial activities, the first approved oxazolidinone against isolates by the standard broth microdilution method...
July 19, 2017: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/28721638/contribution-of-echocardiography-in-the-diagnosis-of-definitive-infective-endocarditis-the-infectious-disease-specialist-s-point-of-view
#6
B Davido, A Moussiegt, A Dinh, O Senard, L Deconinck, O Auzel, X Repesse, M Sirol, M Morgan, J Salomon
In 1994, the original Duke criteria introduced the usefulness of echocardiography for the diagnosis of definitive infective endocarditis (IE). Recently, the European Society of Cardiology (ESC) highlighted the need of complementary imaging to support the diagnosis of embolic events and cardiac involvement when echocardiography findings are negative or doubtful. We decided to study the usefulness of transthoracic and transesophageal echocardiography (TTE/TEE) for the diagnosis of definitive IE in patients who already benefited from complementary investigations...
July 18, 2017: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/28715920/genital-tract-gbs-and-rate-of-histologic-chorioamnionitis-in-patients-with-preterm-premature-rupture-of-membrane
#7
Krunal Patel, Shauna Williams, George Guirguis, Lisa Gittens-Williams, Joseph Apuzzio
INTRODUCTION: Histologic chorioamnionitis (HC) is a common finding in the placenta from patients with preterm premature rupture of membranes (PPROM). The purpose of this study is to determine if HC differs based on the Group B streptococcus (GBS) status in patients managed expectantly with PPROM <34 weeks gestation. METHODS: A retrospective study was performed of patients admitted with PPROM between 23 0/7 and 33 6/7 weeks from 2003 to 2014 at one institution...
July 17, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28713513/the-prevalence-and-risk-factors-of-group-b-streptococcus-colonization-in-iranian-pregnant-women
#8
Roksana Darabi, Sima Tadi, Mitra Mohit, Erfan Sadeghi, Gita Hatamizadeh, Bahareh Kardeh, Mina Etminan-Bakhsh, Yekta Parsa
BACKGROUND: Group B Streptococcus (GBS) is a leading cause of serious neonatal infections. Although great progress has been made in preventing prenatal GBS, its colonization rate in different regions of Iran remains unknown. AIM: To determine GBS colonization prevalence and its risk factors among Iranian pregnant women. METHODS: This prospective cross-sectional study was performed on 186 pregnant women, who attended Boo-Ali hospital which is affiliated with Islamic Azad University in Tehran, Iran, from March 2014 to June 2015...
May 2017: Electronic Physician
https://www.readbyqxmd.com/read/28709393/microbiome-associated-with-severe-caries-in-canadian-first-nations-children
#9
M Agnello, J Marques, L Cen, B Mittermuller, A Huang, N Chaichanasakul Tran, W Shi, X He, R J Schroth
Young Indigenous children in North America suffer from a higher degree of severe early childhood caries (S-ECC) than the general population, leading to speculation that the etiology and characteristics of the disease may be distinct in this population. To address this knowledge gap, we conducted the first microbiome analysis of an Indigenous population using modern molecular techniques. We investigated the caries-associated microbiome among Canadian First Nations children with S-ECC. Thirty First Nations children <72 mo of age with S-ECC and 20 caries-free children were recruited in Winnipeg, Canada...
July 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28706510/natural-killer-cell-functions-during-the-innate-immune-response-to-pathogenic-streptococci
#10
Paul Lemire, Tristan Galbas, Jacques Thibodeau, Mariela Segura
Dendritic cells (DCs) and NK cells play a crucial role in the first phase of host defense against infections. Group B Streptococcus (GBS) and Streptococcus suis are encapsulated streptococci causing severe systemic inflammation, leading to septicemia and meningitis. Yet, the involvement of NK cells in the innate immune response to encapsulated bacterial infection is poorly characterized. Here, it was observed that these two streptococcal species rapidly induce the release of IFN-γ and that NK cells are the major cell type responsible for this production during the acute phase of the infection...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28705964/draft-genome-sequences-of-seven-streptococcus-agalactiae-strains-isolated-from-camelus-dromedarius-at-the-horn-of-africa
#11
Julian Rothen, Tobias Schindler, Joël F Pothier, Mario Younan, Ulrich Certa, Claudia Daubenberger, Valentin Pflüger, Joerg Jores
We present draft whole-genome sequences of seven Streptococcus agalactiae strains isolated from Camelus dromedarius in Kenya and Somalia. These data are an extension to the group B Streptococcus (GBS) pangenome and might provide more insight into the underlying mechanisms of pathogenicity and antibiotic resistance of camel GBS.
July 13, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28705427/invasive-disease-by-streptococcus-pyogenes-patients-hospitalized-for-6-years
#12
Vanessa Arias-Constantí, Victoria Trenchs-Sainz de la Maza, Nuria Elvira Sanz-Marcos, Carmina Guitart-Pardellans, Amadeu Gené-Giralt, Carles Luaces-Cubells
INTRODUCTION AND OBJECTIVE: The last years an increase of severe cases of invasive disease (ID) due to Streptococcus pyogenes or streptococcus b-hemolytic group A (SGA) had been detected. The aim of this study was to analyze the epidemiology and the clinical features of ID due to SGA in a tertiary Pediatric Hospital. MATERIAL AND METHODS: Retrospective study in a Pediatric hospital, of all in-patients with final diagnosis of ID due to SGA during 6 years (2009-2014)...
July 10, 2017: Enfermedades Infecciosas y Microbiología Clínica
https://www.readbyqxmd.com/read/28696530/immunogenicity-and-safety-of-single-dose-13-valent-pneumococcal-conjugate-vaccine-in-pediatric-and-adolescent-oncology-patients
#13
Te-Yu Hung, Rishi S Kotecha, Christopher C Blyth, Sarah K Steed, Ruth B Thornton, Anne L Ryan, Catherine H Cole, Peter C Richmond
BACKGROUND: Children receiving immunosuppressive treatment for cancer are at high risk for invasive pneumococcal disease. The 13-valent pneumococcal conjugate vaccine (PCV13) can prevent pneumococcal disease in healthy children; however, there is an absence of literature regarding the benefit of PCV13 in immunocompromised children with cancer. METHODS: A prospective, open-label cohort study recruited children between ages 1 and 18 years who were receiving active immunosuppressive therapy (AIT) or were within 12 months after completing immunosuppressive therapy (CIT)...
July 11, 2017: Cancer
https://www.readbyqxmd.com/read/28695642/maternal-intra-partum-antibiotic-treatment-continues-to-exert-a-bactericidal-effect-on-the-umbilical-cord-and-peripheral-venous-blood-of-newborn-infants
#14
C Hershkovich-Shporen, R Bardenstein, I Blickstein, E S Shinwell, O Flidel-Rimon
AIM: It is unclear whether maternal intra-partum antibiotic treatment (IAT) continues to exert a bactericidal effect on common pathogens in neonates. We studied the in vitro bactericidal effect of IAT on the cord and peripheral venous blood of newborn infants. METHODS: Umbilical cord and peripheral venous blood from newborn infants born at Kaplan Medical Center, Israel, from April to October 2014 were studied for serum bactericidal titers against Group B Streptococcus (GBS) and Escherichia coli (E...
July 11, 2017: Acta Paediatrica
https://www.readbyqxmd.com/read/28694854/antimicrobial-resistant-pattern-and-capsular-typing-of-streptococcus-pneumoniae-isolated-from-children-in-sistan-baluchestan
#15
Zahra Gharailoo, Seyed Fazlollah Mousavi, Niloofar Halvani, Mohammad Mehdi Feizabadi
BACKGROUND: Ankyloglossia is an anatomic developmental anomaly determining by thick and short, fi brotic ferenum. Tongue changes have severe eff ects on occlusion and oropharyngeal structures. The aim of this study was to evaluate the position of hyoid in children 7-11 years` old with ankyloglossia in lateral cephalometric radiographs. MATERIALS AND METHOD: In this study 260 nasopharyngeal swabs were taken from non-vaccinated healthy children between 6 months to 6 years old at medical centers in Sistan-Baluchestan during August 2013 to January 2014...
September 2016: Mædica
https://www.readbyqxmd.com/read/28692184/traditional-empiric-antibiotic-treatment-is-still-effective-for-neonatal-fever
#16
Maytal Kristal, Vika Dor, Daniel Glikman
Fever may be the only sign of a serious bacterial infection (SBI) in neonates. Ampicillin plus cefotaxime (A+C) and ampicillin plus gentamicin (A+G) are commonly used as empiric therapies for Escherichia coli, Group B Streptococcus (GBS) and Listeria monocytogenes, which are the most likely neonatal SBI pathogens (1). Culture-based screening and prophylaxis has significantly lowered GBS infections and an alarming increase in the antimicrobial resistance rates of Gram-negative bacteria, including cefotaxime and gentamicin resistance, has been reported (1-3)...
July 10, 2017: Acta Paediatrica
https://www.readbyqxmd.com/read/28690591/characterization-of-the-microbiome-along-the-gastrointestinal-tract-of-growing-turkeys
#17
Toby J Wilkinson, A A Cowan, H E Vallin, L A Onime, Linda B Oyama, S J Cameron, Charlotte Gonot, J M Moorby, K Waddams, V J Theobald, D Leemans, S Bowra, C Nixey, Sharon A Huws
The turkey microbiome is largely understudied, despite its relationship with bird health and growth, and the prevalence of human pathogens such as Campylobacter spp. In this study we investigated the microbiome within the small intestine (SI), caeca (C), large intestine (LI), and cloaca (CL) of turkeys at 6, 10, and 16 weeks of age. Eight turkeys were dissected within each age category and the contents of the SI, C, LI, and CL were harvested. 16S rDNA based QPCR was performed on all samples and samples for the four locations within three birds/age group were sequenced using ion torrent-based sequencing of the 16S rDNA...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28684920/bacteriotherapy-with-streptococcus-salivarius-24smb-and-streptococcus-oralis-89a-nasal-spray-for-preventing-recurrent-acute-otitis-media-in-children-a-real-life-clinical-experience
#18
Ignazio La Mantia, Attilio Varricchio, Giorgio Ciprandi
Recurrence of acute otitis media (RAOM) is a relevant issue in the clinical practice. "Bacteriotherapy" has been proposed as an option in children with RAOM. Streptococcus salivarius 24SMB nasal spray has been previously demonstrated to reduce the risk of acute otitis media (AOM) in otitis-prone children. The current retrospective and observational study aimed to confirm this outcome in a real-life setting, such as the common pediatric practice. Group A (108 children) served as control; group B (159 children) was treated with S...
2017: International Journal of General Medicine
https://www.readbyqxmd.com/read/28673280/incidence-clinical-features-and-implications-on-outcomes-of-neonatal-late-onset-sepsis-with-concurrent-infectious-focus
#19
I-Hsyuan Wu, Ming-Horng Tsai, Mei-Yin Lai, Lee-Fen Hsu, Ming-Chou Chiang, Reyin Lien, Ren-Huei Fu, Hsuan-Rong Huang, Shih-Ming Chu, Jen-Fu Hsu
BACKGROUND: Neonatal bloodstream infection (BSI) is the most important cause of morbidity and mortality in the neonatal intensive care unit (NICU). Although most neonatal BSIs are primary bacteremia, some are associated with a focus of infection. This distinction is not well characterized. METHODS: All patients with neonatal late-onset sepsis (LOS) between January 2006 and December 2013 were enrolled. LOS was categorized as a BSI with a concurrent focus of infection if LOS occurred before or within 24 h after the diagnosis of a specific infectious entity, and as "primary bacteremia" if no concurrent focus of infection was identified...
July 3, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28673237/contribution-of-pilus-type-2b-to-invasive-disease-caused-by-a-streptococcus-agalactiae-st-17-strain
#20
Maddalena Lazzarin, Rong Mu, Monica Fabbrini, Claudia Ghezzo, C Daniela Rinaudo, Kelly S Doran, Immaculada Margarit
BACKGROUND: Group B Streptococcus (GBS) is a major cause of invasive disease especially in neonates. In GBS three structurally distinct pilus polymers have been identified as important virulence factors and promising vaccine candidates. The vast majority of Group B Streptococci belonging to the hypervirulent serotype III ST-17 lineage bear pilus types 1 and 2b. The purpose of this study was to investigate the relative contribution of these two pilus types to the pathogenesis of a ST-17 strain...
July 3, 2017: BMC Microbiology
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