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Streptococcus group B

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https://www.readbyqxmd.com/read/28318766/bacille-calmette-gu%C3%A3-rin-bcg-vaccination-at-birth-and-antibody-responses-to-childhood-vaccines-a-randomised-clinical-trial
#1
Thomas Nørrelykke Nissen, Nina Marie Birk, Gaby Smits, Dorthe Lisbeth Jeppesen, Lone Graff Stensballe, Mihai G Netea, Fiona van der Klis, Christine Stabell Benn, Ole Pryds
INTRODUCTION: BCG vaccination has been associated with beneficial non-specific effects on child health. Some immunological studies have reported heterologous effects of vaccines on antibody responses to heterologous vaccines. Within a randomised clinical trial of Bacille Calmette-Guérin (BCG) vaccination at birth, The Danish Calmette Study, we investigated the effect of BCG at birth on the antibody response to the three routine vaccines against DiTeKiPol/Act-Hib and Prevenar 13 in a subgroup of participants...
March 15, 2017: Vaccine
https://www.readbyqxmd.com/read/28315021/clinical-strains-of-streptococcus-agalactiae-carry-two-different-variants-of-pathogenicity-island-xii
#2
Eugenia Kuleshevich, Joseph Ferretti, Ilda Santos Sanches, Natesan Balasubramanian, Barbara Spellerberg, Androulla Efstratiou, Paula Kriz, Kornelia Grabovskaya, Olga Arjanova, Alevtina Savitcheva, Valentin Shevchenko, Anton Rysev, Alexander Suvorov
Streptococcus agalactiae or Group B streptococci (GBS) are a common cause of serious diseases of newborns and adults. GBS pathogenicity largely depends on genes located on the accessory genome including several pathogenicity islands (PAI). The present paper is focused on the structure and molecular epidemiological analysis of one of the GBS pathogenicity islands-the pathogenicity island PAI XII (Glaser et al. Mol Microbiol 45(6):1499-1513, 2002). This PAI was found to be composed of three different mobile genetic elements: a composite transposon (PAI-C), a genomic islet (PAI-B), and a pathogenicity island associated with gene sspB1 (PAI-A)...
March 18, 2017: Folia Microbiologica
https://www.readbyqxmd.com/read/28304326/group-b-streptococcus-colonization-and-hiv-in-pregnancy-a-cohort-study-in-nigeria
#3
R Biobaku Oluwafunmilola, O Olaleye Atinukek, F Adefusi Olorunwa, A Adeyemi Babalola, O Onipede Anthony, M Loto Olabisi, O Imaralu John
BACKGROUND: Group B streptococcus (GBS) is a leading cause of maternal and neonatal infectious morbidity. HIV is prevalent among pregnant women in Nigeria. AIM: To determine the rates of anogenital GBS colonization in our institution and compare GBS colonization rates between HIV positive and negative pregnant women. METHODS: A cross-sectional comparative study was conducted over 6 months. Patients were separated according to their HIV status: positive and negative...
March 16, 2017: Journal of Neonatal-perinatal Medicine
https://www.readbyqxmd.com/read/28301990/risk-factors-for-community-acquired-bacterial-meningitis
#4
Lene Fogt Lundbo, Thomas Benfield
BACKGROUND: Bacterial meningitis is a significant burden of disease and mortality in all age groups worldwide despite the development of effective conjugated vaccines. The pathogenesis of bacterial meningitis is based on complex and incompletely understood host-pathogen interactions. Some of these are pathogen-specific, while some are shared between different bacteria. METHODS: We searched the database PubMed to identify host risk factors for bacterial meningitis caused by the pathogens Streptococcus pneumoniae, Neisseria meningitidis and Haemophilus influenzae type b, because they are three most common causative bacteria beyond the neonatal period...
June 2017: Infectious Diseases
https://www.readbyqxmd.com/read/28295891/molecular-serotyping-virulence-gene-profiling-and-pathogenicity-of-streptococcus-agalactiae-isolated-from-tilapia-farms-in-thailand-by-multiplex-pcr
#5
Korntip Kannika, Duangjai Pisuttharachai, Prapansak Srisapoome, Janenuj Wongtavatchai, Hidehiro Kondo, Ikuo Hirono, Sasimanas Unajak, Nontawith Areechon
AIMS: This study aimed to biotype Streptococcus agalactiae isolated from tilapia farms in Thailand based on molecular biotyping methods and to determine the correlation between the serotype and virulence of bacteria. In addition to a biotyping (serotyping) technique based on multiplex PCR of cps genes, in this study, we developed multiplex PCR typing of Group B streptococcus (GBS) virulence genes to examine 3 clusters of virulence genes and their correlation to the pathogenicity of S...
March 13, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28293224/prevalence-of-m75-streptococcus-pyogenes-strains-harboring-slaa-gene-in-patients-affected-by-pediatric-obstructive-sleep-apnea-syndrome-in-central-italy
#6
Elisa Viciani, Francesca Montagnani, Giacinta Tordini, Antonio Romano, Lorenzo Salerni, Andrea De Luca, Paolo Ruggiero, Andrea G O Manetti
Recently we reported an association between pediatric obstructive sleep apnea syndrome (OSAS) and Group A streptococcus (GAS) sub-acute chronic tonsil colonization. We showed that GAS may contribute to tonsil hyperplasia via a streptolysin O (SLO)-dependent cysteinyl leukotrienes (CysLTs) production, which can trigger T and B cell proliferation. In the present study, we characterized the GAS strains isolated from pediatric OSAS patients in comparison with a panel of age and sex matched GAS strains unrelated to OSAS, but isolated in the same area and during the same period ranging from 2009 to 2013...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28292338/antibacterial-effect-of-calcium-hydroxide-with-or-without-chlorhexidine-as-intracanal-dressing-in-primary-teeth-with-apical-periodontitis
#7
Lea A B Silva, Priscilla C Romualdo, Raquel A B Silva, Maria C M Souza-Gugelmin, Luciana C Pazelli, Aldevina C De Freitas, Gisele Faria, Paulo Nelson-Filho
PURPOSE: The purpose of this study was to evaluate in vivo the antibacterial effect of calcium hydroxide (CH) dressings, with or without chlorhexidine (CHX), on human primary teeth with apical periodontitis. METHODS: Forty root canals in 40 children were selected. A first microbiological sample was obtained after coronal opening, and the teeth were randomly assigned to Group 1 (root canals filled with CH paste) and Group 2 (CH paste plus 1.0 percent CHX). After 30 days, the dressing was removed and the canals were allowed to remain empty for 72 hours...
January 15, 2017: Pediatric Dentistry
https://www.readbyqxmd.com/read/28287001/transplacental-passage-of-vancomycin
#8
Craig V Towers, Beth Weitz
OBJECTIVE: To evaluate a larger number of patients receiving a vancomycin dosing regimen of 20 mg/kg IV every 8 hours for Group B streptococcus (GBS) chemoprophylaxis and analyze maternal and neonatal cord blood levels at delivery. METHODS: We prospectively enrolled every mother that entered labor with a positive GBS culture and a high-risk penicillin allergy with resistance to clindamycin or unknown sensitivity. Maternal and cord blood vancomycin levels were obtained at delivery...
March 12, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28283948/evaluation-of-the-potency-neutralizing-antibody-response-and-stability-of-a-recombinant-fusion-protein-vaccine-for-streptococcus-pyogenes
#9
E Burlet, H HogenEsch, A Dunham, G Morefield
Streptococcus pyogenes or group A streptococcus (GAS) is a Gram-positive bacterium that can cause a wide range of diseases, including pharyngitis, impetigo, scarlet fever, necrotizing fasciitis, rheumatic fever, and streptococcal toxic shock syndrome. Despite the increasing burden on global health caused by GAS, there is currently no licensed vaccine available. In this study, we evaluated immunogenicity, induction of neutralizing antibodies, and stability of a new recombinant fusion protein vaccine that targets infections from GAS...
March 10, 2017: AAPS Journal
https://www.readbyqxmd.com/read/28276804/screening-for-early-onset-invasive-group-b-streptococcal-disease-in-neonates-in-an-irish-hospital-2001-2014-a-retrospective-audit
#10
Maryke Nielsen, Naveed Sheikh, Eoin Fitzgerald, Mary Meehan, David LeBlanc, Maeve Eogan, Afif El-Khuffash, Richard J Drew
Group B Streptococcus (GBS) is the most common cause of early-onset neonatal sepsis and meningitis. In babies with no clinical suspicion of infection, who are at risk of early-onset invasive disease based on maternal risk factors, blood cultures are taken to detect bacteraemia. In our institution, lumbar punctures are performed in infants with clinical signs of sepsis but not in infants who are well at the time of screening. Between 2001 and 2014, there were 112,361 live births weighing >500 g, of whom 13,959 (12...
February 6, 2017: Infectious Diseases
https://www.readbyqxmd.com/read/28275739/rapid-kinetics-of-serum-iga-after-vaccination-with-prevnar-%C3%A2-13-followed-by-pneumovax-%C3%A2-23
#11
Rebecca R Crowther, Christine M Collins, Cheryl Conley, Osvaldo J Lopez
Streptococcus pneumoniae is a causative agent of community-acquired pneumonias. The recommendations of the 2012 Advisory Committee on Immunization Practices include vaccination with Prevnar(®)13 (protein-polysaccharide conjugate vaccine; PCV), followed by Pneumovax(®)23 (polysaccharide-based vaccine; PSV) in adults 65+ or the immunocompromised. In this experiment, a group of 4 healthy volunteers were vaccinated with PCV followed by PSV 60 days later. ELISAs were optimized to study kinetics of IgA, IgM, total IgG and its four subclasses against 14 polysaccharides of the pneumococcal capsule...
February 2017: Heliyon
https://www.readbyqxmd.com/read/28274774/group-b-streptococcal-colonization-and-transmission-dynamics-in-pregnant-women-and-their-newborns-in-nigeria-implications-for-prevention-strategies
#12
Nubwa Medugu, Kenneth C Iregbu, Robert E Parker, Jessica Plemmons, Pallavi Singh, Lamidi I Audu, Efena Efetie, H Dele Davies, Shannon D Manning
OBJECTIVES: Because few studies have been conducted on group B Streptococcus (GBS) in Nigeria, we sought to estimate GBS colonization and transmission frequencies for 500 women and their newborns and identify risk factors for both outcomes. METHODS: GBS strains were characterized for antibiotic susceptibilities, capsule (cps) genotype, pilus island profile, and multilocus sequence type (ST). RESULTS: In all, 171 (34.2%) mothers and 95 (19...
March 5, 2017: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/28264907/increased-pilus-production-conferred-by-a-naturally-occurring-mutation-alters-host-pathogen-interaction-in-favor-of-carriage-in-streptococcus-pyogenes
#13
Anthony R Flores, Randall J Olsen, Concepcion Cantu, Kyler B Pallister, Fermin E Guerra, Jovanka M Voyich, James M Musser
Studies of the human pathogen group A Streptococcus (GAS) define the carrier phenotype as increased ability to adhere to and persist on epithelial surfaces and decreased ability to cause disease. We tested the hypothesis that a single amino acid change (Arg135Gly) in a highly conserved sensor kinase (LiaS) of a poorly defined GAS regulatory system contributes to a carrier phenotype through increased pilus production. When introduced into an emm serotype-matched invasive strain, the carrier allele (liaS(R135G)) recapitulated a carrier phenotype defined by increased ability to adhere to mucosal surfaces and decreased ability to cause disease...
March 6, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28260599/peritonsillar-abscess-clinical-aspects-of-microbiology-risk-factors-and-the-association-with-parapharyngeal-abscess
#14
REVIEW
Tejs Ehlers Klug
PTA is a collection of pus located between the tonsillar capsule and the pharyngeal constrictor muscle. It is considered a complication of acute tonsillitis and is the most prevalent deep neck infection (approximately 2000 cases annually in Denmark) and cause of acute admission to Danish ENT departments. Teenagers and young adults are most commonly affected and males may predominate over females. However, no studies of age- and gender-stratified incidence rates have previously been published. Furthermore, smoking may be associated with increased risk of peritonsillar abscess (PTA) development, although the magnitude of the association has not been estimated...
March 2017: Danish Medical Journal
https://www.readbyqxmd.com/read/28260100/expression-profile-of-baff-in-peripheral-blood-from-patients-of-iga-nephropathy-correlation-with-clinical-features-and-streptococcus%C3%A2-pyogenes-infection
#15
Nuoyan Zheng, Jinjin Fan, Bing Wang, Dongxian Wang, Pinning Feng, Qiongqiong Yang, Xueqing Yu
B cells are critically important for the pathogenesis of IgA nephropathy (IgAN). The present study aimed to investigate the abundance of B cell activating factor (BAFF), which belongs to the tumor necrosis factor superfamily, in the peripheral blood of patients with IgAN. The different forms of BAFF in peripheral blood and its association with clinical features and immunological factors were analyzed. mRNA levels of BAFF and other associated genes in the peripheral blood mononuclear cells (PBMCs) of patients with IgAN and controls were analyzed by quantitative polymerase chain reaction...
February 10, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28257899/short-read-whole-genome-sequencing-for-determination-of-antimicrobial-resistance-mechanisms-and-capsular-serotypes-of-current-invasive-streptococcus-agalactiae-recovered-in-the-united-states
#16
Benjamin J Metcalf, Sopio Chochua, Robert E Gertz, Paulina A Hawkins, Jessica Ricaldi, Zhongya Li, Hollis Walker, Theresa Tran, Joy Rivers, Saundra Mathis, Delois Jackson, Anita Glennen, Ruth Lynfield, Lesley McGee, Bernard Beall
OBJECTIVES: Our objective was to evaluate and exploit a whole genome sequence (WGS) bioinformatics pipeline for predicting antimicrobial resistance and capsular serotypes from invasive group B streptococci (iGBS). METHODS: For 1975 iGBS recovered during 2015 from CDC's Active Bacterial Core surveillance, we compared pipeline predictions to broth dilution testing. Fifty-six isolates from earlier surveillance were included for testing β-lactams.. Conventional serotyping was compared to WGS-based assignments for 302 isolates...
February 28, 2017: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/28239081/clinical-features-of-spontaneous-bacterial-peritonitis-a-10-year-experience-from-a-single-center
#17
Ha Young Na, Jeong Han Kim, Won Hyeok Choe, So Young Kwon, Byung Chul Yoo
Background/Aims: Spontaneous bacterial peritonitis (SBP) is one of critical complications in liver cirrhosis patients with ascites. We aimed to review clinical course of SBP patients in a 10-year period from single center. Methods: This study enrolled SBP patients between 2005 and 2015. Their medical records were reviewed. The laboratory findings of serum and ascites were examined, and characteristics of isolated microorganisms in ascites were analyzed. Results: Total 51 patients were enrolled...
February 25, 2017: Korean Journal of Gastroenterology, Taehan Sohwagi Hakhoe Chi
https://www.readbyqxmd.com/read/28237500/prospects-for-preventing-infant-invasive-gbs-disease-through-maternal-vaccination
#18
Shabir A Madhi, Ziyaad Dangor
Group B streptococcus (GBS) is a leading cause of neonatal sepsis, with the highest incidence (1.3 per 1000 live births) reported from Africa. Although the incidence of invasive GBS disease is reportedly low in South Asia, there is disconnect between prevalence of maternal recto-vaginal colonization and the incidence of early-onset disease (EOD). This is possibly due to case-ascertainment biases that omit investigation of newborns dying on day-0 of life, which accounts for >90% of EOD. Furthermore, GBS is associated with approximately 15% of all infection related stillbirths...
February 22, 2017: Vaccine
https://www.readbyqxmd.com/read/28236250/group-b-streptococcal-disease-in-infants-in-the-first-year-of-life-a-nationwide-surveillance-study-in-japan-2011-2015
#19
Kousaku Matsubara, Kiyoshi Hoshina, Masatoshi Kondo, Isao Miyairi, Yoshiya Yukitake, Yusuke Ito, Kisei Minami, Ryuichi Genkawa
PURPOSE: This study aimed to describe the epidemiology of childhood group B streptococcus (GBS) disease including late late-onset disease (LLOD) and to clinically characterize recurrent cases and twin-sibling cases in Japan. METHODS: We collected information on infants (<1 year of age) with invasive GBS disease and institutional information about births and transfers through a nationwide questionnaire between 2011 and 2015. RESULTS: We identified 133 infants with early-onset disease (EOD), 274 late-onset disease (LOD), and 38 LLOD from 149 institutes...
February 25, 2017: Infection
https://www.readbyqxmd.com/read/28217556/group-b-streptococcus-induces-neutrophil-recruitment-to-gestational-tissues-and-elaboration-of-extracellular-traps-and-nutritional-immunity
#20
Vishesh Kothary, Ryan S Doster, Lisa M Rogers, Leslie A Kirk, Kelli L Boyd, Joann Romano-Keeler, Kathryn P Haley, Shannon D Manning, David M Aronoff, Jennifer A Gaddy
Streptococcus agalactiae, or Group B Streptococcus (GBS), is a gram-positive bacterial pathogen associated with infection during pregnancy and is a major cause of morbidity and mortality in neonates. Infection of the extraplacental membranes surrounding the developing fetus, a condition known as chorioamnionitis, is characterized histopathologically by profound infiltration of polymorphonuclear cells (PMNs, neutrophils) and greatly increases the risk for preterm labor, stillbirth, or neonatal GBS infection...
2017: Frontiers in Cellular and Infection Microbiology
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