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Streptococcus group B

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https://www.readbyqxmd.com/read/28429163/antimicrobial-susceptibility-of-bacterial-isolates-from-patients-presenting-with-ear-nose-and-throat-ent-infections-in-the-german-community-healthcare-setting
#1
B Olzowy, M Kresken, M Havel, D Hafner, B Körber-Irrgang
Empiric initial antibiotic therapy of bacterial infections is based primarily upon the susceptibility of the most common causative pathogens. The purpose of this study was to provide susceptibility data on six bacterial species known to cause ear, nose and throat (ENT) infections. A total of 1066 isolates collected during a nationwide laboratory-based surveillance study were analysed. All Streptococcus pyogenes isolates were penicillin (PEN)-susceptible, indicating that natural penicillins can still be recommended as the first-line treatment for group A streptococcal tonsillopharyngitis...
April 20, 2017: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/28427348/comparative-genomics-and-evolution-of-the-amylase-binding-proteins-of-oral-streptococci
#2
Elaine M Haase, Yurong Kou, Amarpreet Sabharwal, Yu-Chieh Liao, Tianying Lan, Charlotte Lindqvist, Frank A Scannapieco
BACKGROUND: Successful commensal bacteria have evolved to maintain colonization in challenging environments. The oral viridans streptococci are pioneer colonizers of dental plaque biofilm. Some of these bacteria have adapted to life in the oral cavity by binding salivary α-amylase, which hydrolyzes dietary starch, thus providing a source of nutrition. Oral streptococcal species bind α-amylase by expressing a variety of amylase-binding proteins (ABPs). Here we determine the genotypic basis of amylase binding where proteins of diverse size and function share a common phenotype...
April 20, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28425925/evaluation-of-the-immunomodulatory-properties-of-streptococcus-suis-and-group-b-streptococcus-capsular-polysaccharides-on-the-humoral-response
#3
Cynthia Calzas, Morgan Taillardet, Insaf Salem Fourati, David Roy, Marcelo Gottschalk, Hugo Soudeyns, Thierry Defrance, Mariela Segura
Streptococcus suis and group B Streptococcus (GBS) are encapsulated streptococci causing septicemia and meningitis. Antibodies (Abs) against capsular polysaccharides (CPSs) have a crucial protective role, but the structure/composition of the CPS, including the presence of sialic acid, may interfere with the generation of anti-CPS Ab responses. We investigated the features of the CPS-specific Ab response directed against S. suis serotypes 2 and 14 and GBS serotypes III and V after infection or immunization with purified native or desialylated CPSs in mice...
April 20, 2017: Pathogens
https://www.readbyqxmd.com/read/28420662/outcome-of-a-screening-programme-for-the-prevention-of-neonatal-invasive-early-onset-group-b-streptococcus-infection-in-a-uk-maternity-unit-an-observational-study
#4
G Gopal Rao, G Nartey, T McAree, A O'Reilly, S Hiles, T Lee, S Wallace, R Batura, P Khanna, H Abbas, C Tilsed, R Nicholl, T Lamagni, P Bassett
BACKGROUND: Against a background of failure to prevent neonatal invasive early-onset group B Streptococcus infections (GBS) in our maternity unit using risk-based approach for intrapartum antibiotic prophylaxis, we introduced an antenatal GBS carriage screening programme to identify additional women to target for prophylaxis. OBJECTIVES: To describe the implementation and outcome of an antepartum screening programme for prevention of invasive early-onset GBS infection in a UK maternity unit...
April 18, 2017: BMJ Open
https://www.readbyqxmd.com/read/28417006/first-report-of-serotype-23b-streptococcus-pneumoniae-isolated-from-an-adult-patient-with-invasive-infection-in-japan
#5
A Takamatsu, M Kawaguchiya, B Chang, M Ito, Y Hirano, S Katsuta, S Matsuzaka, Y Serizawa, N Kobayashi
Serotype 23B Streptococcus pneumoniae was isolated from a 67-year-old Japanese patient with meningitis. This isolate was susceptible to penicillin G, while genotyped as gPISP with a mutation in a penicillin-binding motif in PBP2b. The 23B isolate was assigned to ST11996 that is related to CC439, a dominant group among serotype 23B.
May 2017: New Microbes and New Infections
https://www.readbyqxmd.com/read/28416607/human-milk-oligosaccharides-inhibit-growth-of-group-b-streptococcus
#6
Ann E Lin, Chloe A Autran, Alexandra Szyszka, Tamara Escajadillo, Mia Huang, Kamil Godula, Anthony R Prudden, Geert-Jan Boons, Amanda L Lewis, Kelly S Doran, Victor Nizet, Lars Bode
Streptococcus agalactiae (group B Streptococcus; GBS) is a leading cause of invasive bacterial infections in newborns, typically acquired vertically during childbirth secondary to maternal vaginal colonization. Human milk oligosaccharides (HMOs) have important nutritional and biological activities that guide development of the infant's immune system and shape the composition of normal gut microbiota. In this manner, HMOs help protect against pathogen colonization and reduce risk of infection. In the course of our studies of HMO-microbial interactions, we unexpectedly uncovered a novel HMO property to directly inhibit the growth of GBS, independent of host immunity...
April 17, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28412792/-isolation-of-cariogenic-streptococcus-mutans-and-the-inhibitory-effect-of-egg-yolk-antibody-on-caries
#7
X L Li, Z Zhang, Z X Li, N J Deng, B Zeng, Y M Chen
Objective: To isolate the cariogenic Streptococcus mutans (Sm) strains and study the therapeutical effect of egg yolk antibody (IgY) of the Sm on dental caries development. Methods: Sm strains were isolated from the children's dental plaque samples. Morphological, biochemical and molecular biological methods were applied to identify the serotype, acid producing and adhesion abilities of isolated Sm strains. After inactivation one of the Sm strains was used as antigen to immune laying hens to collect and extract the specific anti-Sm IgY...
April 9, 2017: Zhonghua Kou Qiang Yi Xue za Zhi, Zhonghua Kouqiang Yixue Zazhi, Chinese Journal of Stomatology
https://www.readbyqxmd.com/read/28402182/analysis-of-point-mutations-in-the-pbp2x-pbp2b-and-pbp1a-genes-of-streptococcus-agalactiae-and-their-relation-with-a-reduced-susceptibility-to-cephalosporins
#8
Giorgio Piccinelli, Giuseppe Carlentini, Franco Gargiulo, Arnaldo Caruso, Maria Antonia De Francesco
The emergence of group B Streptococcus (GBS) isolates with reduced penicillin susceptibility (PRGBS) and their tendency to be nonsusceptible to fluoroquinolones prompted us to analyze the possible presence of amino acid mutations in penicillin-binding proteins (PBPs) (PBP2X, PBP1A, and PBP2B) from a collection of fluoroquinolone-resistant GBS isolates. We analyzed 21 GBS isolates resistant to levofloxacin. Sequence analysis of genes for PBPs was performed. The minimal inhibitory concentrations (MICs) for penicillin, ceftibuten, cefaclor, cefixime, cefotaxime, and ceftizoxime were performed by the Etest method and by broth microdilution method...
April 12, 2017: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/28401320/the-virulence-factors-of-group-a-streptococcus-strains-isolated-from-invasive-and-non-invasive-infections-in-polish-and-german-centres-2009-2011
#9
M Strus, P B Heczko, E Golińska, A Tomusiak, A Chmielarczyk, M Dorycka, M van der Linden, A Samet, A Piórkowska
Streptococcus pyogenes (GAS) is one of the major human pathogenic bacteria that cause a wide range of diseases. Currently, increased incidence of streptococcal invasive infections is observed worldwide. In this study, we focused on the prevalence of genes encoding superantigens and type M proteins in the population of GAS strains from invasive versus non-invasive infections. We tested 253 GAS strains: 48 strains from patients with invasive infections (18 from wound/deep skin localization, 30 from women in labour) and 205 strains from non-invasive forms (147 from common infections of the upper respiratory, 49 from the vagina of females with genital tract infections and 9 from non-invasive wound and superficial skin infections)...
April 11, 2017: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/28398678/maternal-immunization
#10
Helen Y Chu, Janet A Englund
Pregnant women, neonates, and infants are at higher risk for severe infections due to vaccine-preventable diseases. Very young infants rarely respond well to vaccination due to poor immunogenicity and interference from maternal antibody. Maternal immunization protects the mother and fetus from disease and protects the infant through transplacental antibody transfer through the first 6 months of life. Currently, immunizations routinely recommended during pregnancy include inactivated influenza, tetanus toxoid, and acellular pertussis vaccines...
March 15, 2017: Birth Defects Res
https://www.readbyqxmd.com/read/28395627/advice-against-gbs-screening-approval
#11
(no author information available yet)
The government has been recommended not to approve screening for Group B Streptococcus (GBS) at 35 to 37 weeks of pregnancy so that the bacterium can be treated with antibiotics.
April 11, 2017: Nursing Children and Young People
https://www.readbyqxmd.com/read/28392142/memory-b-cell-response-to-a-pcv-13-booster-in-3-5year-old-children-primed-with-either-pcv-7-or-pcv-13
#12
Johannes Trück, Amber Thompson, Begonia Morales-Aza, Elizabeth A Clutterbuck, Merryn Voysey, Ed Clarke, Matthew D Snape, Dominic F Kelly, Adam Finn, Andrew J Pollard
Pneumococcal protein-polysaccharide conjugate vaccines provide direct protection against Streptococcus pneumoniae through the induction of persistent anti-polysaccharide antibodies, and by priming for a rapid secondary antibody response. Memory B cells (BMEM) generated during an initial immune response are responsible for both the more rapid and quantitatively greater secondary antibody response and are also thought to contribute to the ongoing production of plasma cells providing long-term antibody persistence...
April 6, 2017: Vaccine
https://www.readbyqxmd.com/read/28388469/higher-prevalence-of-colonization-with-gardnerella-vaginalis-and-gram-negative-anaerobes-in-patients-with-recurrent-miscarriage-and-elevated-peripheral-natural-killer-cells
#13
R J Kuon, R Togawa, K Vomstein, M Weber, T Goeggl, T Strowitzki, U R Markert, S Zimmermann, V Daniel, A H Dalpke, B Toth
The role of vaginal infections in recurrent miscarriage (RM) is discussed controversially and screening is not recommended in international guidelines. Peripheral and uterine NK cells (pNK, uNK) play an important role in the establishment of a healthy pregnancy and are targets of immune diagnostics in RM patients. The aim of this study was to analyze the composition of the vaginal microbiota in RM patients and to correlate the findings to clinical characteristics as well as NK cell parameters. In total, n=243 RM patients with ≥3 consecutive miscarriages were recruited between 11/2011 and 03/2016...
March 30, 2017: Journal of Reproductive Immunology
https://www.readbyqxmd.com/read/28387490/-an-rare-complication-of-scarlet-fever-invasive-group-a-streptococcal-infection-with-streptococcal-toxic-shock-syndrome
#14
H Warnier, Z Depuis, K Nyamugabo, B Desprechins, M-C Seghaye
Invasive Group A Streptococcus infections and streptococcal toxic shock syndrome are rare complications of common diseases in children such as scarlet fever or impetigo. These invasive diseases are particulary challenging because of their rapid progression and the lack of predisposing factors in most cases. Prompt diagnosis and treatment are mandatory to reduce the mortality associated with these severe diseases. We report the case of an 8- year-old girl who developped an invasive group A streptococcal disease with osteomyelitis and streptococcal toxic shock syndrome in the course of a classical scarlet fever...
March 2017: Revue Médicale de Liège
https://www.readbyqxmd.com/read/28387074/-female-genital-mutilations-the-condition-in-liege
#15
L Swenen, G Brichant, A Kaluanga, V Masson, M Nisolle
Due to current migration flows, the practising obstetrician is likely to encounter parturient women carriers of female genital mutilations (FGM). This article describes the obstetrical complications related to the latter. We compared a group of mutilated patients (n = 69) to a control group (n = 162) and studied the data concerning pregnancy, childbirth, newborn, postpartum and length of hospital stay. Among the mutilated patients, 44% were group B streptococcus carriers against 23 % in the control group (p inferior to 0...
January 2017: Revue Médicale de Liège
https://www.readbyqxmd.com/read/28384969/a-comparison-of-antibacterial-efficacy-of-0-5-sodium-fluoride-impregnated-miswak-and-plain-miswak-sticks-on-streprococcus-mutans-a-randomized-controlled-trial
#16
Romshi Raina, Vinod Kumar, Madhusudan Krishna, Sakshi Raina, Ashish Jaiswal, Arul Selvan, Chaitra Patil, Sneh Kalgotra
INTRODUCTION: Miswak (Salvadora persica) is a tooth cleaning stick made from the Salvodora Persica tree. It serves as a natural dentifrice with anti-bacterial, anti-plaque and anti-fungal properties. Fluoride, impregnated in chewing sticks will bestow comparable safety against dental caries as the fluoride containing dentifrice. AIM: The aim of the present study was to assess and compare the anti-bacterial effect of 0.5% sodium fluoride impregnated miswak and plain miswak sticks on Streptococcus mutans...
February 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28378545/opsonophagocytic-antibodies-to-serotype-ia-ib-and-iii-group-b-streptococcus-among-korean-infants-and-in-intravenous-immunoglobulin-products
#17
Han Wool Kim, Ji Hyen Lee, Hye Kyung Cho, Hyunju Lee, Ho Seong Seo, Soyoung Lee, Kyung Hyo Kim
Group B streptococcus (GBS) infection is a leading cause of sepsis and meningitis among infants, and is associated with high rates of morbidity and mortality in many countries. Protection against GBS typically involves antibody-mediated opsonization by phagocytes and complement components. The present study evaluated serotype-specific functional antibodies to GBS among Korean infants and in intravenous immunoglobulin (IVIG) products. An opsonophagocytic killing assay (OPA) was used to calculate the opsonization indices (OIs) of functional antibodies to serotypes Ia, Ib, and III in 19 IVIG products from 5 international manufacturers and among 98 Korean infants (age: 0-11 months)...
May 2017: Journal of Korean Medical Science
https://www.readbyqxmd.com/read/28367139/antibiotic-prevention-for-maternal-group-b-streptococcal-colonization-on-neonatal-gbs-related-adverse-outcomes-a-meta-analysis
#18
REVIEW
Shunming Li, Jingya Huang, Zhiyao Chen, Dan Guo, Zhenjiang Yao, Xiaohua Ye
Maternal colonization with group B Streptococcus (GBS) during pregnancy increases the risk of neonatal infection by vertical transmission. However, it remains unclear whether treating all colonized women during labor exposes a large number of their neonates to possible adverse effects without benefit. We performed a meta-analysis to assess the effect of intrapartum antibiotic prophylaxis on neonatal adverse outcomes. We identified studies by searching several English and Chinese electronic databases and reviewing relevant articles...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28356413/epidemiological-and-molecular-characterization-of-an-invasive-group-a-streptococcus-emm32-2-outbreak
#19
Jennifer E Cornick, Anmol M Kiran, Roberto Vivancos, Jon Van Aartsen, Jenny Clarke, Edward Bevan, Mansoor Alsahag, Maaike Alaearts, Laura Bricio-Moreno, Howard F Jenkinson, Angela H Nobbs, James Anson, Aras Kadiolgu, Neil French, Dean B Everett
An emm32.2 invasive Group A Streptococcus (iGAS) outbreak occurred in Liverpool from January 2010 to September 2012. This genotype had not previously been identified in Liverpool, but was responsible for 32% (14/44) of all iGAS cases reported during this time period. We performed case-case comparison of emm32.2 iGAS cases with non-emm32.2 control iGAS cases identified in the Liverpool population, over the same time period to assess patient risk factors for emm32.2 iGAS infection. The emm32.2 iGAS cases were confined to the adult population, we show that homelessness, intravenous drug use and alcohol abuse predisposed patients to emm32...
March 29, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28355251/immunization-with-a-streptococcal-multiple-epitope-recombinant-protein-protects-mice-against-invasive-group-a-streptococcal-infection
#20
Chih-Feng Kuo, Nina Tsao, I-Chen Hsieh, Yee-Shin Lin, Jiunn-Jong Wu, Yu-Ting Hung
Streptococcus pyogenes (group A Streptococcus; GAS) causes clinical diseases, including pharyngitis, scarlet fever, impetigo, necrotizing fasciitis and streptococcal toxic shock syndrome. A number of group A streptococcus vaccine candidates have been developed, but only one 26-valent recombinant M protein vaccine has entered clinical trials. Differing from the design of a 26-valent recombinant M protein vaccine, we provide here a vaccination using the polyvalence epitope recombinant FSBM protein (rFSBM), which contains four different epitopes, including the fibronectin-binding repeats domain of streptococcal fibronectin binding protein Sfb1, the C-terminal immunogenic segment of streptolysin S, the C3-binding motif of streptococcal pyrogenic exotoxin B, and the C-terminal conserved segment of M protein...
2017: PloS One
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