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Streptococcus group B

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https://www.readbyqxmd.com/read/29447223/virome-and-bacteriome-characterization-of-children-with-pneumonia-and-asthma-in-mexico-city-during-winter-seasons-2014-and-2015
#1
Jose A Romero-Espinoza, Yazmin Moreno-Valencia, Rodrigo H Coronel-Tellez, Manuel Castillejos-Lopez, Andres Hernandez, Aaron Dominguez, Angel Miliar-Garcia, Arturo Barbachano-Guerrero, Rogelio Perez-Padilla, Alejandro Alejandre-Garcia, Joel A Vazquez-Perez
BACKGROUND: Acute asthma exacerbations and pneumonia are important causes of morbidity and mortality in children and may coexist in the same children, although symptom overlap may lead to difficulties in diagnosis. Microbial and viral diversity and differential abundance of either may play an important role in infection susceptibility and the development of acute and chronic respiratory diseases. OBJECTIVES: To describe the virome and bacteriome present in the upper respiratory tract of hospitalized children with a clinical diagnosis of asthma and pneumonia during an acute exacerbation and an acute respiratory illness ARI episode respectively...
2018: PloS One
https://www.readbyqxmd.com/read/29445511/management-of-group-b-streptococcus-positive-pregnant-women-at-maternity-homes-in-japan-a-questionnaire-survey-of-compliance-among-midwives
#2
Kotomi Yamaguchi, Kazutomo Ohashi
Background: Per the 2014 Japanese Midwives Association (JMA) guidelines, midwives were allowed to manage the deliveries for group B streptococcus (GBS)-positive pregnant women in labour at maternity homes without the supervision of a medical doctor if they complied with the guidelines of the Japan Society of Obstetrics and Gynecology (JSOG), wherein midwives working for maternity homes are expected to cooperate with commissioned obstetricians and paediatricians in cooperative medical facilities...
2018: Maternal Health, Neonatology and Perinatology
https://www.readbyqxmd.com/read/29442290/the-optimisation-of-the-expression-of-recombinant-surface-immunogenic-protein-of-group-b-streptococcus-in-escherichia-coli-by-response-surface-methodology-improves-humoral-immunity
#3
Diego A Díaz-Dinamarca, José I Jerias, Daniel A Soto, Jorge A Soto, Natalia V Díaz, Yessica Y Leyton, Rodrigo A Villegas, Alexis M Kalergis, Abel E Vásquez
Group B Streptococcus (GBS) is the leading cause of neonatal meningitis and a common pathogen in livestock and aquaculture industries around the world. Conjugate polysaccharide and protein-based vaccines are under development. The surface immunogenic protein (SIP) is a conserved protein in all GBS serotypes and has been shown to be a good target for vaccine development. The expression of recombinant proteins in Escherichia coli cells has been shown to be useful in the development of vaccines, and the protein purification is a factor affecting their immunogenicity...
February 13, 2018: Molecular Biotechnology
https://www.readbyqxmd.com/read/29433694/antibioth%C3%A3-rapie-des-infections-n%C3%A3-onatales-bact%C3%A3-riennes-pr%C3%A3-coces-chez-les-nouveau-n%C3%A3-s-n%C3%A3-s-%C3%A3-partir-de-34-semaines-d%C3%A2-am%C3%A3-norrh%C3%A3-e
#4
O Romain
All newborns superior to 34 weeks of gestationnal age (GA) are concerned by these guidelines of the French Society of Neonatology and the French Society of Pediatrics. Only newborns at risk of Early-Onset Neonatal Bacterial Infection who are clinically symptomatic have to be treated with probabilistic antibiotherapy treatment. The antibiotic combination of choice is amoxicillin + gentamicin. The two exceptions that justify dual therapy with Cefotaxime and Gentamicin are the bacteriological documentation of Escherichia coli and/or the presence of clinical signs of severity...
December 2017: Archives de Pédiatrie: Organe Officiel de la Sociéte Française de Pédiatrie
https://www.readbyqxmd.com/read/29433693/pharmacocin%C3%A3-tique-et-pharmacodynamie-des-antibiotiques-est-ce-diff%C3%A3-rent-en-n%C3%A3-onatologie
#5
R Cohen, M Tauzin, S Béchet, L Caeymaex
Pharmacokinetic and pharmacodynamics (PK/PD) data on antimicrobial agents enable physicians to optimize their use in clinical practice. Neonates exhibit a large inter-individual variability in antibiotic levels due to immaturity and maturational changes in the first weeks of life. This variability explains the large therapeutic margins needed to ensure an optimal efficacy of antibiotics. These pharmacokinetic characteristics have to be taken into account when treating neonatal sepsis, along with pharmacodynamics targets for each antibiotic and notably minimal inhibitory concentration for usual causes of neonatal bacterial infections (group B streptococcus and Escherichia coli)...
December 2017: Archives de Pédiatrie: Organe Officiel de la Sociéte Française de Pédiatrie
https://www.readbyqxmd.com/read/29425317/human-cervical-mucus-plugs-exhibit-insufficiencies-in-antimicrobial-activity-towards-group-b-streptococcus
#6
Jay Vornhagen, Phoenicia Quach, Verónica Santana-Ufret, Varchita Alishetti, Alyssa Brokaw, Blair Armistead, Hai Qing Tang, James W MacDonald, Theodor K Bammler, Kristina M Adams Waldorf, Niels Uldbjerg, Lakshmi Rajagopal
Preterm birth is a leading cause of neonatal mortality and lacks an effective therapy. Ascending microbial infections from the lower genital tract lead to infection of the placenta, amniotic fluid and fetus causing preterm birth or stillbirth. Directly in the path of an ascending infection is the cervical mucus plug (CMP), a dense mucoid structure in the cervical canal with potential antimicrobial properties. In this study, we aimed to define the components of CMP responsible for antimicrobial activity against a common lower genital tract organism associated with preterm birth and stillbirths, namely Group B Streptococcus (GBS)...
February 7, 2018: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/29416049/protective-effect-of-group-b-streptococcus-type-iii-polysaccharide-conjugates-against-maternal-colonization-ascending-infection-and-neonatal-transmission-in-rodent-models
#7
Emiliano Chiarot, Angela Spagnuolo, Silvia Maccari, Eleonora Naimo, Alessandra Acquaviva, Raffaella Cecchi, Bruno Galletti, Monica Fabbrini, Elena Mori, Paolo Ruggiero, Guido Grandi, Maria Rita Fontana, Giuliano Bensi, Immaculada Margarit
Group B Streptococcus (GBS) is a normal inhabitant of recto-vaginal mucosae in up to 30% of healthy women. Colonization is a major risk factor for perinatal infection which can lead to severe complications such as stillbirth and neonatal invasive disease. Intra-partum antibiotic prophylaxis in colonized women is a safe and cost-effective preventive measure against early-onset disease in the first days of life, but has no effect on late-onset manifestations or on early maternal infection. Maternal immunization with capsular polysaccharide-based vaccines shows promise for the prevention of both early-onset and late-onset neonatal infections, although ability to prevent maternal colonization and ascending infection has been less studied...
February 7, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29409961/evaluation-of-hibergene-loop-mediated-isothermal-amplification-assay-for-detection-of-group-b-streptococcus-in-recto-vaginal-swabs-a-prospective-diagnostic-accuracy-study
#8
Anya Curry, Gillian Bookless, Karen Donaldson, Susan J Knowles
OBJECTIVES: To prospectively evaluate HiberGene's loop-mediated isothermal amplification (LAMP) assay for detection of Group B Streptococcus (GBS) in maternal recto-vaginal swabs and compare it to enrichment culture. METHODS: Following ethical approval and informed written consent, two low vaginal and rectal swabs were obtained from 400 pregnant women. One swab was tested for GBS using the rapid LAMP assay (index test), the second swab was tested using enrichment culture (reference standard)...
February 1, 2018: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/29407234/pathogenic-features-of-streptococcus-mutans-isolated-from-dental-prosthesis-patients-and-diagnosed-cancer-patients-with-dental-prosthesis
#9
Sultan Ali S Alanazi, Khalid Tawfik Alduaiji A, Bharathraj Shetty, Hamad Awadh Alrashedi, B L Guruprasanna Acharya, Sajith Vellappally, Darshan Devang Divakar
Though S. mutans, virulence, and pathogenesis are characterized reports are limited to the status of its carriage and virulence in patients with oral cancer and prosthesis. In this present study, we investigated the pathogenic characteristics of twenty strains of S. mutans of healthy subjects, fifteen of prosthesis patients, and eleven from oral cancer. The putative virulence gene and other factors, such as the ability to adhere to the oral epithelial cells, production of glycan and lactic acid of these strains were examined as...
January 30, 2018: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29399583/status-of-group-b-streptococcal-vaccine-development
#10
Shun Mei Lin, Yong Zhi, Ki Bum Ahn, Sangyong Lim, Ho Seong Seo
Streptococcus agalactiae (group B streptococcus, GBS) is a leading causal organism of neonatal invasive diseases and severe infections in the elderly. Despite significant advances in the diagnosis and treatment of GBS infections and improvement in personal hygiene standards, this pathogen is still a global health concern. Thus, an effective vaccine against GBS would augment existing strategies to substantially decrease GBS infection. In 2014, World Health Organization convened the first meeting for consultation on GBS vaccine development, focusing on the GBS maternal immunization program, which was aimed at reducing infections in neonates and young infants worldwide...
January 2018: Clinical and Experimental Vaccine Research
https://www.readbyqxmd.com/read/29398277/maternal-immunization-against-group-b-streptococcus-world-health-organization-research-and-development-technological-roadmap-and-preferred-product-characteristics
#11
REVIEW
Johan Vekemans, Vasee Moorthy, Martin Friede, Mark R Alderson, Ajoke Sobanjo-Ter Meulen, Carol J Baker, Paul T Heath, Shabir A Madhi, Kirsty Mehring-Le Doare, Samir K Saha, Stephanie Schrag, David C Kaslow
Group B streptococcus, found in the vagina or lower gastrointestinal tract of about 10-40% of women of reproductive age, is a leading cause of early life invasive bacterial disease, potentially amenable to prevention through maternal immunization during pregnancy. Following a consultation process with global stakeholders, the World Health Organization is herein proposing priority research and development pathways and preferred product characteristics for GBS vaccines, with the aim to facilitate and accelerate vaccine licensure, policy recommendation for wide scale use and implementation...
February 2, 2018: Vaccine
https://www.readbyqxmd.com/read/29390957/streptococcus-agalactiae-meningoencephalitis-associated-with-gastroesophageal-reflux-disease-and-chronic-proton-pump-inhibitors-use-in-a-9%C3%A2-month-old-infant-a-case-report
#12
Victoria Bîrluţiu, Codruța Mihaela Luca, Rareș-Mircea Bîrluțiu
BACKGROUND: Streptococcus agalactiae (Group B Streptococcus) is recognized as the etiologic agent of newborn and infant meningitis, aged up to 90 days, starting from the colonization of the maternal genital or gastrointestinal tract, but it is rarely responsible for meningitis in old infants. CASE PRESENTATION: We present the case of a 9 month-old infant diagnosed with S. agalactiae meningoencephalitis associated with chronic gastroesophageal reflux disease treated with a proton pump inhibitor (PPI)...
February 1, 2018: BMC Pediatrics
https://www.readbyqxmd.com/read/29382496/-orbital-cellulitis-complicated-by-subperiosteal-abscess-due-to-streptococcus-pyogenes-infection
#13
José Daniel Ruíz Carrillo, Edwin Vázquez Guerrero, Mónica Cecilia Mercado Uribe
BACKGROUND: Orbital cellulitis is an infectious disease that is very common in pediatric patients, in which severe complications may develop. Etiological agents related to this disease are Haemophilus influenzae B, Staphylococcus aureus, Streptococcus pneumoniae and Moraxella catarrhalis, which correspond to 95% of cases. Moreover, Streptococcus beta hemolytic and anaerobic microorganisms may also be present corresponding to < 5% of the cases. We present an uncommon case of cellulitis complicated by sub-periosteal abscess caused by Streptococcus pyogenes (Group A beta hemolytic streptococcus)...
March 2017: Boletín Médico del Hospital Infantil de México
https://www.readbyqxmd.com/read/29378883/the-endopeptidase-pepo-regulates-the-speb-cysteine-protease-and-is-essential-for-the-virulence-of-invasive-m1t1-streptococcus-pyogenes
#14
Stephan Brouwer, Amanda J Cork, Cheryl-Lynn Y Ong, Timothy C Barnett, Nicholas P West, Kevin S McIver, Mark J Walker
Streptococcus pyogenes (Group A Streptococcus, GAS) causes a wide range of human infections. The pathogenesis of GAS infections is dependent on the temporal expression of numerous secreted and surface-associated virulence factors that interact with host proteins. Streptococcal pyrogenic exotoxin B (SpeB) is one of the most extensively studied toxins produced by GAS, and the coordinate growth phase-dependent regulation of speB expression is linked to disease severity phenotypes. Here we identified the endopeptidase PepO as a novel growth phase-dependent regulator of SpeB in the invasive GAS M1-serotype strain 5448...
January 29, 2018: Journal of Bacteriology
https://www.readbyqxmd.com/read/29378799/a-vaginal-tract-signal-detected-by-the-gbs-saers-system-elicits-transcriptomic-changes-and-enhances-murine-colonization
#15
Laura C Cook, Hong Hu, Mark Maienschein-Cline, Michael J Federle
Streptococcus agalactiae (Group B Streptococcus, GBS) can colonize the human vaginal tract leading to both superficial and serious infections in adults and neonates. To study bacterial colonization of the reproductive tract in a mammalian system, we employ a murine vaginal carriage model. Using RNASeq, the transcriptome of GBS growing in vivo during vaginal carriage was determined. Over one-quarter of the genes in GBS are found to be differentially regulated during in vivo colonization as compared to laboratory cultures...
January 29, 2018: Infection and Immunity
https://www.readbyqxmd.com/read/29374589/functional-activity-of-maternal-and-cord-antibodies-elicited-by-an-investigational-group-b-streptococcus-trivalent-glycoconjugate-vaccine-in-pregnant-women
#16
Monica Fabbrini, Fabio Rigat, Giovanna Tuscano, Emiliano Chiarot, Gilbert Donders, Roland Devlieger, Sara Filippini, Elisabetta Frigimelica, Pietro Forte, Frederick Wittke, Scott A Halperin, Karen Slobod, Guido Grandi, Immaculada Margarit
OBJECTIVES: The main aim of this exploratory study was to evaluate functional activity of antibodies elicited by a maternal Group B Streptococcus (GBS) investigational vaccine composed of capsular polysaccharides Ia, Ib, and III conjugated to genetically detoxified Diphtheria toxin CRM197. The second objective was to investigate the relationship between serotype-specific IgG concentrations and functional activity in maternal and cord sera. METHODS: Maternal and cord sera collected at baseline and at delivery from vaccine and placebo recipients during a double-blind placebo-controlled Phase II study (www...
January 29, 2018: Journal of Infection
https://www.readbyqxmd.com/read/29373267/mediastinal-subcutaneous-and-multiple-muscular-abscesses-caused-by-group-b-streptococcus-serotype-viii-in-a-type-2-diabetes-mellitus-patient
#17
Yuka Omura, Yoshiki Kusama, Noriko Takeuchi, Naruhiko Ishiwada
We report a case of mediastinal subcutaneous and multiple muscular abscesses caused by group B streptococcus serotype VIII in a type 2 diabetes mellitus patient. The patient arrived at the hospital with the chief complaint of immobility, and blood examination results suggested an acute infection and poorly controlled diabetes mellitus. Group B streptococcal bacteria were cultured from the patient's blood, and identified as serotype VIII upon further analysis. The patient recovered without any sequelae after percutaneous drainage, antibiotic therapy, and intensive glycemic control...
January 17, 2018: Journal of Infection and Chemotherapy: Official Journal of the Japan Society of Chemotherapy
https://www.readbyqxmd.com/read/29371153/pilus-encoding-islets-in-s-agalactiae-and-its-association-with-antibacterial-resistance-and-serotype-distribution
#18
Farzaneh Khodaei, Mohammad Najafi, Alka Hasani, Enayatollah Kalantar, Esmail Sharifi, Abbas Amini, Mohammad Aghazadeh
Group B Streptococcus (GBS) is a versatile organism which uses multiple virulence factors which bind to the surface of epithelial cells. Pili are one of virulence factors detected in recent years. A total of 90 isolates were collected from invasive and non-invasive isolates among adults throughout 2014-2015. Isolates were serotyped at molecular level based on capsular polysaccharide (cps) serotyping and analyzed for pilus island profiles, scpB gene, and hvgA gene presence. Isolates were subjected to antimicrobial susceptibility towards penicillin, tetracycline, erythromycin, clindamycin, moxifloxacin, levofloxacin, and vancomycin by disk diffusion method and MICs for erythromycin and clindamycin were determined by broth dilution methods...
January 22, 2018: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29360883/mucosal-immunization-with-pspa-pneumococcal-surface-protein-a-adsorbed-nanoparticles-targeting-the-lungs-for-protection-against-pneumococcal-infection
#19
Tasson C Rodrigues, Maria Leonor S Oliveira, Alessandra Soares-Schanoski, Stefanni L Chavez-Rico, Douglas B Figueiredo, Viviane M Gonçalves, Daniela M Ferreira, Nitesh K Kunda, Imran Y Saleem, Eliane N Miyaji
Burden of pneumonia caused by Streptococcus pneumoniae remains high despite the availability of conjugate vaccines. Mucosal immunization targeting the lungs is an attractive alternative for the induction of local immune responses to improve protection against pneumonia. Our group had previously described the development of poly(glycerol adipate-co-ω-pentadecalactone) (PGA-co-PDL) polymeric nanoparticles (NPs) adsorbed with Pneumococcal surface protein A from clade 4 (PspA4Pro) within L-leucine microcarriers (nanocomposite microparticles-NCMPs) for mucosal delivery targeting the lungs (NP/NCMP PspA4Pro)...
2018: PloS One
https://www.readbyqxmd.com/read/29349041/unusual-cause-of-severe-diabetic-ketoacidosis-precipitated-by-streptococcus-bovis-equinus-sbsec-bacteremia-case-report-and-review-of-literature
#20
Sana Idrees, Sonali Gupta, Miguel Mantilla, Pradeep Goyal, Ilja Hulinsky
Diabetic ketoacidosis is a feared complication in patients with diabetes mellitus and poses high risk of mortality and morbidity unless treated in timely manner. Infection is one of the most common precipitating factors for the development of diabetic ketoacidosis. Bacteremia with Group A and Group B beta hemolytic streptococcal strains are well known, however nonenterococcal Group D strains such as the Streptococcus bovis/Streptococcus equinus complex (SBSEC) still remains an understudied entity. Here we present a case of a 35-year-old Type I diabetic female presenting with severe diabetic ketoacidosis with overlapping features of hyperosmolar hyperglycemia, precipitated by Streptococcus alactolyticus bacteremia, successfully treated with four-week course of parenteral ceftriaxone...
2018: IDCases
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