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Group B streptococcus

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https://www.readbyqxmd.com/read/29150372/duration-of-group-a-streptococcus-pcr-positivity-following-antibiotic-treatment-of-pharyngitis
#1
Jason H Homme, Corryn S Greenwood, Lisa B Cronk, Lisa M Nyre, James R Uhl, Amy L Weaver, Robin Patel
BACKGROUND: Polymerase chain reaction (PCR) has high sensitivity and specificity for detection of group A streptococcus (GAS) in throat swabs and is routinely used for GAS pharyngitis diagnosis at our institution. Herein we defined the natural history of throat swab GAS PCR and culture positivity during and following treatment of GAS pharyngitis. METHODS: Fifty children with a PCR positive GAS throat swab were recruited for participation. Four additional throat swabs were collected over 2 weeks following the initial positive PCR result (during and following a standard course of antibiotic therapy) and tested for GAS using rapid real-time PCR and culture...
October 12, 2017: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/29149199/epidemiology-and-clinical-profile-of-pathogens-responsible-for-the-hospitalization-of-children-in-sousse-area-tunisia
#2
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/29148967/group-b-streptococcus-infections-caused-by-improper-sourcing-and-handling-of-fish-for-raw-consumption-singapore-2015-2016
#3
Man L Chau, Swaine L Chen, Min Yap, Sri H P Hartantyo, Paul K T Chiew, Charlene J Fernandez, Wai K Wong, Rockey K Fong, Wei L Tan, Brian Z Y Tan, Youming Ng, Kyaw T Aung, Kurosh S Mehershahi, Christopher Goh, Joanne S L Kang, Timothy Barkham, Adeline O K Leong, Ramona A Gutiérrez, Lee C Ng
We assessed microbial safety and quality of raw fish sold in Singapore during 2015-2016 to complement epidemiologic findings for an outbreak of infection with group B Streptococcus serotype III sequence type (ST) 283 associated with raw fish consumption. Fish-associated group B Streptococcus ST283 strains included strains nearly identical (0-2 single-nucleotide polymorphisms) with the human outbreak strain, as well as strains in another distinct ST283 clade (57-71 single-nucleotide polymorphisms). Our investigations highlight the risk for contamination of freshwater fish (which are handled and distributed separately from saltwater fish sold as sashimi) and the need for improved hygienic handling of all fish for raw consumption...
December 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/29148379/characterization-of-streptococcus-pyogenes-from-animal-clinical-specimens-spain
#4
Ana Isabel Vela, Pilar Villalón, Juan Antonio Sáez-Nieto, Gema Chacón, Lucas Domínguez, José Francisco Fernández-Garayzábal
Streptococcus pyogenes appears to be almost exclusively restricted to humans, with few reports on isolation from animals. We provide a detailed characterization (emm typing, pulsed-field gel electrophoresis [PFGE], and multilocus sequence typing [MLST]) of 15 S. pyogenes isolates from animals associated with different clinical backgrounds. We also investigated erythromycin resistance mechanisms and phenotypes and virulence genes. We observed 2 emm types: emm12 (11 isolates) and emm77 (4 isolates). Similarly, we observed 2 genetic linages, sequence type (ST) 26 and ST63...
December 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/29122072/inhibition-of-residual-cariogenic-bacteria-in-atraumatic-restorative-treatment-by-chlorhexidine-disinfection-or-incorporation
#5
Jooie S Joshi, Noor M Roshan, Basha Sakeenabi, P Poornima, N B Nagaveni, V V Subbareddy
PURPOSE: The purpose of this study was to compare the efficacy of chlorhexidine (CHX) cavity disinfection and of CHX containing glass ionomer cement (GIC) in inhibiting residual cariogenic bacteria. METHODS: Ninety, five- to nine-year-olds were randomly allocated to three groups: Group 1-CHX containing GIC; Group 2-CHX cavity disinfection; and Group 3-conventional GIC. Total viable count (TVC), Streptococcus mutans (SM), and Lactobacillus (LB) were analyzed pre-, post-, and three months after atraumatic restorative treatment (ART)...
July 15, 2017: Pediatric Dentistry
https://www.readbyqxmd.com/read/29117332/estimates-of-the-burden-of-group-b-streptococcal-disease-worldwide-for-pregnant-women-stillbirths-and-children
#6
Anna C Seale, Fiorella Bianchi-Jassir, Neal J Russell, Maya Kohli-Lynch, Cally J Tann, Jenny Hall, Lola Madrid, Hannah Blencowe, Simon Cousens, Carol J Baker, Linda Bartlett, Clare Cutland, Michael G Gravett, Paul T Heath, Margaret Ip, Kirsty Le Doare, Shabir A Madhi, Craig E Rubens, Samir K Saha, Stephanie J Schrag, Ajoke Sobanjo-Ter Meulen, Johan Vekemans, Joy E Lawn
Background: We aimed to provide the first comprehensive estimates of the burden of group B Streptococcus (GBS), including invasive disease in pregnant and postpartum women, fetal infection/stillbirth, and infants. Intrapartum antibiotic prophylaxis is the current mainstay of prevention, reducing early-onset infant disease in high-income contexts. Maternal GBS vaccines are in development. Methods: For 2015 live births, we used a compartmental model to estimate (1) exposure to maternal GBS colonization, (2) cases of infant invasive GBS disease, (3) deaths, and (4) disabilities...
November 6, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29117329/preterm-birth-associated-with-group-b-streptococcus-maternal-colonization-worldwide-systematic-review-and-meta-analyses
#7
Fiorella Bianchi-Jassir, Anna C Seale, Maya Kohli-Lynch, Joy E Lawn, Carol J Baker, Linda Bartlett, Clare Cutland, Michael G Gravett, Paul T Heath, Margaret Ip, Kirsty Le Doare, Shabir A Madhi, Samir K Saha, Stephanie Schrag, Ajoke Sobanjo-Ter Meulen, Johan Vekemans, Craig E Rubens
Background: Preterm birth complications are the leading cause of deaths among children <5 years of age. Studies have suggested that group B Streptococcus (GBS) maternal rectovaginal colonization during pregnancy may be a risk factor for preterm delivery. This article is the fifth of 11 in a series. We aimed to assess the association between GBS maternal colonization and preterm birth in order to inform estimates of the burden of GBS. Methods: We conducted systematic literature reviews (PubMed/Medline, Embase, Latin American and Caribbean Health Sciences Literature [LILACS], World Health Organization Library Information System [WHOLIS], and Scopus) and sought unpublished data from investigator groups on the association of preterm birth (<37 weeks' gestation) and maternal GBS colonization (GBS isolation from vaginal, cervical, and/or rectal swabs; with separate subanalysis on GBS bacteriuria)...
November 6, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29117328/maternal-disease-with-group-b-streptococcus-and-serotype-distribution-worldwide-systematic-review-and-meta-analyses
#8
Jennifer Hall, Nadine Hack Adams, Linda Bartlett, Anna C Seale, Theresa Lamagni, Fiorella Bianchi-Jassir, Joy E Lawn, Carol J Baker, Clare Cutland, Paul T Heath, Margaret Ip, Kirsty Le Doare, Shabir A Madhi, Craig E Rubens, Samir K Saha, Stephanie Schrag, Ajoke Sobanjo-Ter Meulen, Johan Vekemans, Michael G Gravett
Background: Infections such as group B Streptococcus (GBS) are an important cause of maternal sepsis, yet limited data on epidemiology exist. This article, the third of 11, estimates the incidence of maternal GBS disease worldwide. Methods: We conducted systematic literature reviews (PubMed/Medline, Embase, Latin American and Caribbean Health Sciences Literature [LILACS], World Health Organization Library Information System [WHOLIS], and Scopus) and sought unpublished data on invasive GBS disease in women pregnant or within 42 days postpartum...
November 6, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29117327/maternal-colonization-with-group-b-streptococcus-and-serotype-distribution-worldwide-systematic-review-and-meta-analyses
#9
Neal J Russell, Anna C Seale, Megan O'Driscoll, Catherine O'Sullivan, Fiorella Bianchi-Jassir, Juan Gonzalez-Guarin, Joy E Lawn, Carol J Baker, Linda Bartlett, Clare Cutland, Michael G Gravett, Paul T Heath, Kirsty Le Doare, Shabir A Madhi, Craig E Rubens, Stephanie Schrag, Ajoke Sobanjo-Ter Meulen, Johan Vekemans, Samir K Saha, Margaret Ip
Background: Maternal rectovaginal colonization with group B Streptococcus (GBS) is the most common pathway for GBS disease in mother, fetus, and newborn. This article, the second in a series estimating the burden of GBS, aims to determine the prevalence and serotype distribution of GBS colonizing pregnant women worldwide. Methods: We conducted systematic literature reviews (PubMed/Medline, Embase, Latin American and Caribbean Health Sciences Literature [LILACS], World Health Organization Library Information System [WHOLIS], and Scopus), organized Chinese language searches, and sought unpublished data from investigator groups...
November 6, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29117326/infant-group-b-streptococcal-disease-incidence-and-serotypes-worldwide-systematic-review-and-meta-analyses
#10
Lola Madrid, Anna C Seale, Maya Kohli-Lynch, Karen M Edmond, Joy E Lawn, Paul T Heath, Shabir A Madhi, Carol J Baker, Linda Bartlett, Clare Cutland, Michael G Gravett, Margaret Ip, Kirsty Le Doare, Craig E Rubens, Samir K Saha, Ajoke Sobanjo-Ter Meulen, Johan Vekemans, Stephanie Schrag
Background: Group B Streptococcus (GBS) remains a leading cause of neonatal sepsis in high-income contexts, despite declines due to intrapartum antibiotic prophylaxis (IAP). Recent evidence suggests higher incidence in Africa, where IAP is rare. We investigated the global incidence of infant invasive GBS disease and the associated serotypes, updating previous estimates. Methods: We conducted systematic literature reviews (PubMed/Medline, Embase, Latin American and Caribbean Health Sciences Literature [LILACS], World Health Organization Library Information System [WHOLIS], and Scopus) and sought unpublished data regarding invasive GBS disease in infants aged 0-89 days...
November 6, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29117325/risk-of-early-onset-neonatal-group-b-streptococcal-disease-with-maternal-colonization-worldwide-systematic-review-and-meta-analyses
#11
Neal J Russell, Anna C Seale, Catherine O'Sullivan, Kirsty Le Doare, Paul T Heath, Joy E Lawn, Linda Bartlett, Clare Cutland, Michael Gravett, Margaret Ip, Shabir A Madhi, Craig E Rubens, Samir K Saha, Stephanie Schrag, Ajoke Sobanjo-Ter Meulen, Johan Vekemans, Carol J Baker
Background: Early-onset group B streptococcal disease (EOGBS) occurs in neonates (days 0-6) born to pregnant women who are rectovaginally colonized with group B Streptococcus (GBS), but the risk of EOGBS from vertical transmission has not been systematically reviewed. This article, the seventh in a series on the burden of GBS disease, aims to estimate this risk and how it varies with coverage of intrapartum antibiotic prophylaxis (IAP), used to reduce the incidence of EOGBS. Methods: We conducted systematic reviews (Pubmed/Medline, Embase, Latin American and Caribbean Health Sciences Literature (LILACS), World Health Organization Library Information System [WHOLIS], and Scopus) and sought unpublished data from investigator groups on maternal GBS colonization and neonatal outcomes...
November 6, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29117323/group-b-streptococcal-disease-worldwide-for-pregnant-women-stillbirths-and-children-why-what-and-how-to-undertake-estimates
#12
Joy E Lawn, Fiorella Bianchi-Jassir, Neal J Russell, Maya Kohli-Lynch, Cally J Tann, Jennifer Hall, Lola Madrid, Carol J Baker, Linda Bartlett, Clare Cutland, Michael G Gravett, Paul T Heath, Margaret Ip, Kirsty Le Doare, Shabir A Madhi, Craig E Rubens, Samir K Saha, Stephanie Schrag, Ajoke Sobanjo-Ter Meulen, Johan Vekemans, Anna C Seale
Improving maternal, newborn, and child health is central to Sustainable Development Goal targets for 2030, requiring acceleration especially to prevent 5.6 million deaths around the time of birth. Infections contribute to this burden, but etiological data are limited. Group B Streptococcus (GBS) is an important perinatal pathogen, although previously focus has been primarily on liveborn children, especially early-onset disease. In this first of an 11-article supplement, we discuss the following: (1) Why estimate the worldwide burden of GBS disease? (2) What outcomes of GBS in pregnancy should be included? (3) What data and epidemiological parameters are required? (4) What methods and models can be used to transparently estimate this burden of GBS? (5) What are the challenges with available data? and (6) How can estimates address data gaps to better inform GBS interventions including maternal immunization? We review all available GBS data worldwide, including maternal GBS colonization, risk of neonatal disease (with/without intrapartum antibiotic prophylaxis), maternal GBS disease, neonatal/infant GBS disease, and subsequent impairment, plus GBS-associated stillbirth, preterm birth, and neonatal encephalopathy...
November 6, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29117322/stillbirth-with-group-b-streptococcus-disease-worldwide-systematic-review-and-meta-analyses
#13
Anna C Seale, Hannah Blencowe, Fiorella Bianchi-Jassir, Nicholas Embleton, Quique Bassat, Jaume Ordi, Clara Menéndez, Clare Cutland, Carmen Briner, James A Berkley, Joy E Lawn, Carol J Baker, Linda Bartlett, Michael G Gravett, Paul T Heath, Margaret Ip, Kirsty Le Doare, Craig E Rubens, Samir K Saha, Stephanie Schrag, Ajoke Sobanjo-Ter Meulen, Johan Vekemans, Shabir A Madhi
Background: There are an estimated 2.6 million stillbirths each year, many of which are due to infections, especially in low- and middle-income contexts. This paper, the eighth in a series on the burden of group B streptococcal (GBS) disease, aims to estimate the percentage of stillbirths associated with GBS disease. Methods: We conducted systematic literature reviews (PubMed/Medline, Embase, Literatura Latino-Americana e do Caribe em Ciências da Saúde, World Health Organization Library Information System, and Scopus) and sought unpublished data from investigator groups...
November 6, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29115413/evaluation-of-the-accuracy-and-sensitivity-of-high%C3%A2-throughput-sequencing-technology-using-known-microbiota
#14
Fanjing Meng, Tingtao Chen, Xin Wang, Xiaolei Wang, Hua Wei, Puyuan Tian, Huan Wang, Xiaoxiao Zhao, Liang Shen, Hongbo Xin
Next generation sequencing provides an excellent platform to explore microbiota in any given environment, and little work is required to evaluate the accuracy and sensitivity of high‑throughput sequencing technology. In the present study, a known microbiota containing Escherichia coli, Lactobacillus plantarum, Streptococcus thermophilus, Bifidobacterium bifidum, Bacillus subtilis, Enterococcus faecalis and Salmonella typhimurium was used to evaluate the high‑throughput sequencing technology. The results suggested that there were 122...
October 20, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29109718/siga-tgf-%C3%AE-1-il-10-and-tnf%C3%AE-in-colostrum-are-associated-with-infant-group-b-streptococcus-colonization
#15
Kirsty Le Doare, Katie Bellis, Amadou Faal, Jessica Birt, Daniel Munblit, Holly Humphries, Stephen Taylor, Fiona Warburton, Paul T Heath, Beate Kampmann, Andrew Gorringe
Background: Group B Streptococcus (GBS) is a major cause of mortality and morbidity in infants and is associated with transmission from a colonized mother at birth and via infected breastmilk. Although maternal/infant colonization with GBS is common, the majority of infants exposed to GBS remain unaffected. The association between breastmilk immune factors and infant colonization and disease prevention has not been elucidated. Objectives: We have investigated the association between SIgA and cytokines in breastmilk and infant GBS colonization and clearance...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29109702/genomic-comparison-among-lethal-invasive-strains-of-streptococcus-pyogenes-serotype-m1
#16
Gabriel R Fernandes, Aulus E A D Barbosa, Renan N Almeida, Fabíola F Dos S Castro, Marina de C P da Ponte, Celio Faria-Junior, Fernanda M P Müller, Antônio A B Viana, Dario Grattapaglia, Octavio L Franco, Sérgio A Alencar, Simoni C Dias
Streptococcus pyogenes, also known as group A Streptococcus (GAS), is a human pathogen that causes diverse human diseases including streptococcal toxic shock syndrome (STSS). A GAS outbreak occurred in Brasilia, Brazil, during the second half of the year 2011, causing 26 deaths. Whole genome sequencing was performed using Illumina platform. The sequences were assembled and genes were predicted for comparative analysis with emm type 1 strains: MGAS5005 and M1 GAS. Genomics comparison revealed one of the invasive strains that differ from others isolates and from emm 1 reference genomes...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29109175/the-streptococcus-agalactiae-stringent-response-enhances-virulence-and-persistence-in-human-blood
#17
Thomas A Hooven, Andrew J Catomeris, Maryam Bonakdar, Luke J Tallon, Ivette Santana-Cruz, Sandra Ott, Sean C Daugherty, Hervé Tettelin, Adam J Ratner
Streptococcus agalactiae (group B Streptococcus, GBS) causes serious infection in neonates. We previously reported a Tn-seq system for performing genome-wide assessment of gene fitness in GBS. In order to identify molecular mechanisms required for GBS to transition from a mucosal commensal lifestyle to bloodstream invasion, we performed Tn-seq on GBS coincubated with human whole blood. Our analysis identified 16 genes conditionally essential for GBS survival in blood, of which 75% were members of the capsular polysaccharide (cps) operon...
November 6, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/29107417/osteoarticular-and-skin-and-soft-tissue-infections-caused-by-streptococcus-agalactiae-in-elderly-patients-are-frequently-associated-with-bacteremia
#18
Corinne Ruppen, Julia Notter, Carol Strahm, Beat Sonderegger, Parham Sendi
Older persons (≥65 years) are at risk for invasive group B streptococcal (GBS) infections. The most frequent clinical syndromes in 174 infection episodes were osteoarticular (40%) and skin and soft-tissue infections (30%). In 36% of episodes, a companion microorganism was isolated, and in 45%, blood culture results were positive. Antibiotics were streamlined after species identification in 29% of monomicrobial infections. These findings have clinical and therapeutic implications for GBS infections in the elderly...
September 19, 2017: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/29106586/immunization-with-a-latch-peptide-provides-serotype-independent-protection-against-group-b-streptococcus-infection-in-mice
#19
Shun-Mei Lin, A-Yeung Jang, Yong Zhi, Shuang Gao, Sangyong Lim, Jae Hyang Lim, Joon Young Song, Paul M Sullam, Joon Heang Rhee, Ho Seong Seo
Streptococcus agalactiae (Group B streptococcus, GBS) is a leading cause of neonatal invasive diseases as well as of severe infections in the elderly. The GBS serine rich repeat glycoprotein, Srr1, acts as a critical virulent factor by facilitating GBS invasion into the central nervous system through interaction with the fibrinogen A chain. In this study, we found that Srr1 is highly conserved in GBS clinical isolates (86.7%). Following immunization with different Srr1 truncated peptides, we demonstrated that only mice immunized with Srr1 truncates containing the latch domain were protected against GBS meningitis...
November 2, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/29104937/novel-genes-required-for-the-fitness-of-streptococcus-pyogenes-in-human-saliva
#20
Luchang Zhu, Amelia R L Charbonneau, Andrew S Waller, Randall J Olsen, Stephen B Beres, James M Musser
Streptococcus pyogenes (group A streptococcus [GAS]) causes 600 million cases of pharyngitis each year. Despite this considerable disease burden, the molecular mechanisms used by GAS to infect, cause clinical pharyngitis, and persist in the human oropharynx are poorly understood. Saliva is ubiquitous in the human oropharynx and is the first material GAS encounters in the upper respiratory tract. Thus, a fuller understanding of how GAS survives and proliferates in saliva may provide valuable insights into the molecular mechanisms at work in the human oropharynx...
November 2017: MSphere
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