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Group B streptococcus

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https://www.readbyqxmd.com/read/28929964/-investigation-of-bacterial-and-viral-etiology-in-community-acquired-central-nervous-system-infections-with-molecular-methods
#1
Hasip Kahraman, Alper Tünger, Şebnem Şenol, Hörü Gazi, Meltem Avcı, Bahar Örmen, Nesrin Türker, Sabri Atalay, Şükran Köse, Sercan Ulusoy, Meltem Işıkgöz Taşbakan, Oğuz Reşat Sipahi, Tansu Yamazhan, Zeynep Gülay, Sema Alp Çavuş, Hüsnü Pullukçu
In this multicenter prospective cohort study, it was aimed to evaluate the bacterial and viral etiology in community-acquired central nervous system infections by standart bacteriological culture and multiplex polymerase chain reaction (PCR) methods. Patients hospitalized with central nervous system infections between April 2012 and February 2014 were enrolled in the study. Demographic and clinical information of the patients were collected prospectively. Cerebrospinal fluid (CSF) samples of the patients were examined by standart bacteriological culture methods, bacterial multiplex PCR (Seeplex meningitis-B ACE Detection (Streptococcus pneumoniae, Neisseria meningitidis, Haemophilus influenzae, Listeria monocytogenes, Group B streptococci) and viral multiplex PCR (Seeplex meningitis-V1 ACE Detection kits herpes simplex virus-1 (HSV1), herpes simplex virus-2 (HSV2), varicella zoster virus (VZV), cytomegalovirus (CMV), Epstein Barr virus (EBV) and human herpes virus 6 (HHV6)) (Seeplex meningitis-V2 ACE Detection kit (enteroviruses))...
July 2017: Mikrobiyoloji Bülteni
https://www.readbyqxmd.com/read/28924558/non-hemolytic-group-b-streptococcus-as-a-cause-of-chemotherapy-port-infection
#2
Ray-Young Tsao, Larry Lutwick
No abstract text is available yet for this article.
2017: IDCases
https://www.readbyqxmd.com/read/28923955/leaderless-secreted-peptide-signaling-molecule-alters-global-gene-expression-and-increases-virulence-of-a-human-bacterial-pathogen
#3
Hackwon Do, Nishanth Makthal, Arica R VanderWal, Mandy Rettel, Mikhail M Savitski, Nikolai Peschek, Kai Papenfort, Randall J Olsen, James M Musser, Muthiah Kumaraswami
Successful pathogens use complex signaling mechanisms to monitor their environment and reprogram global gene expression during specific stages of infection. Group A Streptococcus (GAS) is a major human pathogen that causes significant disease burden worldwide. A secreted cysteine protease known as streptococcal pyrogenic exotoxin B (SpeB) is a key virulence factor that is produced abundantly during infection and is critical for GAS pathogenesis. Although identified nearly a century ago, the molecular basis for growth phase control of speB gene expression remains unknown...
September 18, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28923300/influence-of-co-infection-complicated-with-human-papillomavirus-on-cervical-intraepithelial-neoplasia-development-in-patients-with-atypical-squamous-cells-of-undetermined-significance
#4
Hisami Kiseki, Yutaka Tsukahara, Natsumi Tajima, Ayako Tanaka, Aya Horimoto, Naohiko Hashimura
AIM: Human papillomaviruses (HPV) infection is a primary cause of the development of cervical precancerous lesions and cervical cancer. However, the influence of other infections on intraepithelial neoplasia (CIN) development has not been fully elucidated. We evaluated the association between co-infection and CIN development in subjects with atypical squamous cells of undetermined significance (ASCUS). METHOD: Data for ASCUS subjects who had undergone testing for high risk HPV (HR-HPV) and pathological diagnosis were analyzed...
September 8, 2017: Journal of Infection and Chemotherapy: Official Journal of the Japan Society of Chemotherapy
https://www.readbyqxmd.com/read/28923133/genetic-evidence-for-a-novel-variant-of-the-pilus-island-1-backbone-protein-in-group-b-streptococcus
#5
Sarah Teatero, Alefiya Neemuchwala, Kunlin Yang, Janice Gomes, Taryn B T Athey, Irene Martin, Walter Demczuk, Allison McGeer, Nahuel Fittipaldi
PURPOSE: Pili contribute significantly to the pathogenesis of infection of group B Streptococcus (GBS) by facilitating adhesion and invasion of host cells. GBS pilin subunits (the backbone pilin protein, BP, and the ancillary pilin proteins, AP) as well as the specific enzymes required for pilus assembly are encoded by genes located in two separate genomic regions, known as pilus island 1 (PI-1) and PI-2. Our aim was to characterize the pilus profile of a collection of GBS isolates from metropolitan Toronto, Canada...
September 19, 2017: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/28920845/modified-use-of-real-time-pcr-detection-of-group-b-streptococcus-in-pregnancy
#6
Ali A Rabaan, Justin V Saunar, Ali M Bazzi, Joan L Soriano
The CDC recommends antenatal screening of vaginal/rectal samples for Streptococcus agalactiae at 35-37 weeks' gestation, with intra-partum antibiotic prophylaxis for positive cases. We tested a modified use of the Cepheid Xpert GBS real-time PCR kit on enrichment cultures from 554 vaginal/rectal swabs compared to the current subculturing gold standard method. Swabs were inoculated on polymyxin nalidixic acid agar plates, and Todd-Hewitt enrichment broth cultures were examined daily for growth. Todd-Hewitt broth culture was also used for Xpert GBS...
September 18, 2017: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/28918144/short-communication-molecular-epidemiology-of-streptococcus-agalactiae-differs-between-countries
#7
J Reyes, M Chaffer, Juan Carlos Rodriguez-Lecompte, Javier Sánchez, Ruth N Zadoks, Natasha Robinson, Ximena Cardona, N Ramírez, G P Keefe
Group B Streptococcus or Streptococcus agalactiae continue to be challenging for milk quality programs in countries with emerging dairy industries, such as Colombia, where high prevalence has been reported. Molecular typing of isolates is needed to understand the variability and epidemiology of this pathogen and to develop effective control and eradication programs. We characterized the molecular profile of Strep. agalactiae isolated from cows with subclinical mastitis in 21 Colombian dairy herds and measured diversity within and between herds using multilocus sequence typing...
September 13, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28916188/mast-cell-chymase-decreases-the-severity-of-group-b-streptococcus-infections
#8
Claire Gendrin, Nicholas J Shubin, Erica Boldenow, Sean Merillat, Morgan Clauson, Danny Power, Kelly S Doran, Magnus Abrink, Gunnar Pejler, Lakshmi Rajagopal, Adrian M Piliponsky
BACKGROUND: Group B Streptococcus (GBS) or Streptococcus agalactiae are ß-hemolytic, Gram-positive bacteria that colonize the lower genital tract of women and are frequently associated with infections during pregnancy. Innate immune defenses are critical for controlling GBS dissemination and systemic infection. Mast cells are resident sentinel cells that come into contact with pathogens early during colonization and infection. OBJECTIVE: We aimed to investigate the contribution of chymase to systemic GBS infection and rates of preterm birth...
September 12, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28914240/comparison-of-candida-species-isolated-from-children-with-and-without-early-childhood-caries-a-descriptive-cross-sectional-study
#9
M S Beena, Faizal C Peedikayil, M B GufranAfmed, T P Chandru, K Soni, N Dhanesh
BACKGROUND: Early childhood caries (ECC) is characterized by the presence of one or more decayed, missing (due to caries), or filled teeth surfaces in any primary tooth, in a child below 6 years of age. Although ECC is primarily associated with high levels of maternal Streptococcus mutans, there has been an increased interest in finding the relationship between oral fungal flora and dental caries. OBJECTIVE: The aim of the study is to identify and characterize the Candida species and to compare the candidal isolates in children with ECC and without ECC...
October 2017: Journal of the Indian Society of Pedodontics and Preventive Dentistry
https://www.readbyqxmd.com/read/28910279/longitudinal-multiparameter-single-cell-analysis-of-macaques-immunized-with-pneumococcal-protein-conjugated-or-unconjugated-polysaccharide-vaccines-reveals-distinct-antigen-specific-memory-b-cell-repertoires
#10
Bin Jia, Lisa K McNeil, Christopher D Dupont, Konstantinos Tsioris, Rachel M Barry, Ingrid L Scully, Adebola O Ogunniyi, Christopher Gonzalez, Michael W Pride, Todd M Gierahn, Paul A Liberator, Kathrin U Jansen, J Christopher Love
BACKGROUND: The efficacy of protein-conjugated pneumococcal polysaccharide vaccines has been well characterized for children. The level of protection conferred by unconjugated polysaccharide vaccines remains less clear, particularly for elderly individuals who have had prior antigenic experience through immunization with unconjugated polysaccharide vaccines or natural exposure to Streptococcus pneumoniae. METHODS: We compared the magnitude, diversity and genetic biases of antigen-specific memory B cells in two groups of adult cynomolgus macaques that were immunized with a 7-valent conjugated vaccine and boosted after five years with either a 13-valent pneumococcal polysaccharide conjugate vaccine (13vPnC) or a 23-valent unconjugated pneumococcal polysaccharide vaccine (23vPS) using microengraving (a single-cell analysis method) and single-cell RT-PCR...
2017: PloS One
https://www.readbyqxmd.com/read/28904998/parallel-evolution-of-group-b-streptococcus-hypervirulent-clonal-complex-17-unveils-new-pathoadaptive-mutations
#11
Alexandre Almeida, Isabelle Rosinski-Chupin, Céline Plainvert, Pierre-Emmanuel Douarre, Maria J Borrego, Claire Poyart, Philippe Glaser
Group B Streptococcus (GBS) is a commensal of the gastrointestinal and genitourinary tracts, while a prevailing cause of neonatal disease worldwide. Of the various clonal complexes (CCs), CC17 is overrepresented in GBS-infected newborns for reasons that are still largely unknown. Here, we report a comprehensive genomic analysis of 626 CC17 isolates collected worldwide, identifying the genetic traits behind their successful adaptation to humans and the underlying differences between carriage and clinical strains...
September 2017: MSystems
https://www.readbyqxmd.com/read/28895708/-deep-neck-infections-report-of-three-pediatric-cases
#12
Roxana Spini, Elena Arias, Lucas Bordino, Daniela Cohen, Julián Michalski
Retropharyngeal and parapharyngeal abscesses are rare but associated with significant morbidity and potential mortality. In recent years, there has been an increase in the incidence of these infections, mainly due to a greater availability of computed tomography scan and a greater virulence of the germs (Group A b-hemolytic Streptococcus and methicillin-resistant Staphylococcus aureus). They predominate in children younger than 5 years. Treatment of retropharyngeal and parapharyngeal abscesses consists of an intravenous antibiotic and eventually surgical drainage...
October 1, 2017: Archivos Argentinos de Pediatría
https://www.readbyqxmd.com/read/28888762/probiotic-supplementation-in-chronic-kidney-disease-a-double-blind-randomized-placebo-controlled-trial
#13
Natália A Borges, Flávia L Carmo, Milena B Stockler-Pinto, Jessyca S de Brito, Carla J Dolenga, Dennis C Ferreira, Lia S Nakao, Alexandre Rosado, Denis Fouque, Denise Mafra
OBJECTIVE: The objective of the study was to evaluate the effects of probiotic supplementation on the gut microbiota profile and inflammatory markers in chronic kidney disease patients undergoing maintenance hemodialysis (HD). DESIGN AND METHODS: This was a randomized, double-blind, placebo-controlled study. Forty-six HD patients were assigned to receive 1 of 2 treatments: probiotic (n = 23; Streptococcus thermophilus, Lactobacillus acidophilus e Bifidobacterialongum, 90 billion colony-forming units per day) or placebo (n = 23) daily for 3 months...
September 6, 2017: Journal of Renal Nutrition
https://www.readbyqxmd.com/read/28884055/a-biofunctionalizable-ink-platform-composed-of-catechol-modified-chitosan-and-reduced-graphene-oxide-platinum-nanocomposite
#14
Peter Sobolewski, Agata Goszczyńska, Małgorzata Aleksandrzak, Karolina Urbaś, Joanna Derkowska, Agnieszka Bartoszewska, Jacek Podolski, Ewa Mijowska, Mirosława El Fray
We present an ink platform for a printable polymer-graphene nanocomposite that is intended for the development of modular biosensors. The ink consists of catechol-modified chitosan and reduced graphene oxide decorated with platinum nanoparticles (rGO-Pt). We modified the chitosan with catechol groups, in order to obtain adhesive properties and improve solubility. Dispersions of rGO-Pt in ethylene glycol were admixed with an aqueous solution of modified chitosan to yield an ink that is suitable for non-contact piezoelectric printing using a commercial microplotter (Sonoplot GIX Microplotter Desktop)...
2017: Beilstein Journal of Nanotechnology
https://www.readbyqxmd.com/read/28883971/vaccination-of-hiv-infected-pregnant-women-implications-for-protection-of-their-young-infants
#15
REVIEW
Ziyaad Dangor, Marta C Nunes, Gaurav Kwatra, Sanjay G Lala, Shabir A Madhi
BACKGROUND: The prevention of mother to child transmission of HIV has resulted in reduced burden of pediatric HIV-infection, but the prevalence of maternal HIV infection remains high in sub-Saharan African countries. HIV-exposed-uninfected infants have an increased risk of morbidity and mortality due to infectious diseases than HIV-unexposed infants, particularly during the first six months of life, which in part might be due to lower levels of pathogen-specific protective antibodies acquired transplacentally from their mothers...
2017: Tropical Diseases, Travel Medicine and Vaccines
https://www.readbyqxmd.com/read/28882582/group-b-streptococcal-infection-in-neonates-and-colonization-in-pregnant-women-an-epidemiological-retrospective-analysis
#16
Ching-Yi Cho, Yi-Hsuan Tang, Yu-Hsuan Chen, Szu-Yao Wang, Yi-Hsin Yang, Ting-Hao Wang, Chang-Ching Yeh, Keh-Gong Wu, Mei-Jy Jeng
BACKGROUND: Group B Streptococcus (GBS) infection is one of the major causes of neonatal morbidity and mortality. Universal GBS screening with intrapartum antibiotic prophylaxis (IAP) in pregnant women were initiated in 2012 in Taiwan. This study aimed to analyze the most recent maternal GBS colonization rate and the changes in neonatal GBS infection rate from 2011 to 2016. METHODS: All pregnant women and their live born neonates between January 2011 and June 2016 were retrospectively reviewed...
August 23, 2017: Journal of Microbiology, Immunology, and Infection, Wei Mian Yu Gan Ran za Zhi
https://www.readbyqxmd.com/read/28870726/analysis-of-the-prophages-carried-by-human-infecting-isolates-provides-new-insight-into-the-evolution-of-group-b-streptococcus-species
#17
Nathalie van der Mee-Marquet, Seydina M Diene, Laurie Barbera, Luka Courtier-Martinez, Louise Lafont, Alice Ouachée, Anne-Sophie Valentin, Sandra Dos Santos, Roland Quentin, Patrice François
OBJECTIVES: Group B Streptococcus (GBS) emerged in the 1970s as a major cause of neonatal infections, and has been increasingly associated with infections in adults since the 1990s. Prophages have been suspected to have driven these epidemiological trends. We have characterized the prophages harboured by 275 human GBS isolates belonging to the major lineages. METHODS: We applied whole genome sequencing (WGS) to 14 isolates representative of the diversity within GBS species, located and identified their prophages...
September 1, 2017: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/28869231/how-a-mild-influenza-b-infection-can-kill-a-case-of-pulmonary-hemorrhage
#18
Nathalie Abi Hatem, Sabrina Campbell, Deepa Kuchelan, Jennifer Bowers, Edmundo Rubio
Viral influenza is a seasonal infection associated with significant morbidity and mortality. Rapidly fatal hemorrhagic pneumonia has been described in previously healthy individuals with β-hemolytic Streptococcus pneumoniae in a small series of patients, but it is not common in patients coinfected with influenza B and β-hemolytic Streptococcus, particularly since influenza B is considered less pathogenic than influenza A. However, despite being uncommon, this coinfection seems to be associated with high morbidity and mortality, particularly in healthy individuals...
September 2017: Lung India: Official Organ of Indian Chest Society
https://www.readbyqxmd.com/read/28859955/human-placentophagy-a-review
#19
REVIEW
Alex Farr, Frank A Chervenak, Laurence B McCullough, Rebecca N Baergen, Amos Grünebaum
Placentophagy or placentophagia, the postpartum ingestion of the placenta, is widespread among mammals; however, no contemporary human culture incorporates eating placenta postpartum as part of its traditions. At present, there is an increasing interest in placentophagy among postpartum women, especially in the United States. The placenta can be eaten raw, cooked, roasted, dehydrated, or encapsulated or through smoothies and tinctures. The most frequently used preparation appears to be placenta encapsulation after steaming and dehydration...
August 30, 2017: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28842640/cross-sectional-evaluation-of-the-gut-microbiome-metabolome-axis-in-an-italian-cohort-of-ibd-patients
#20
Maria Laura Santoru, Cristina Piras, Antonio Murgia, Vanessa Palmas, Tania Camboni, Sonia Liggi, Ivan Ibba, Maria Antonia Lai, Sandro Orrù, Anna Lisa Loizedda, Julian Leether Griffin, Paolo Usai, Pierluigi Caboni, Luigi Atzori, Aldo Manzin
Inflammatory bowel disease (IBD) is a chronic inflammatory disease of the gastrointestinal tract of uncertain origin, which includes ulcerative colitis (UC) and Crohn's disease (CD). The composition of gut microbiota may change in IBD affected individuals, but whether dysbiosis is the cause or the consequence of inflammatory processes in the intestinal tissue is still unclear. Here, the composition of the microbiota and the metabolites in stool of 183 subjects (82 UC, 50 CD, and 51 healthy controls) were determined...
August 25, 2017: Scientific Reports
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