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Group a streptococcal

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https://www.readbyqxmd.com/read/27924597/natural-transformation-of-oral-streptococci-by-use-of-synthetic-pheromones
#1
Gabriela Salvadori, Roger Junges, Rabia Khan, Heidi A Åmdal, Donald A Morrison, Fernanda C Petersen
The discovery that Streptococcus pneumoniae uses a competence-stimulating peptide (CSP) to induce competence for natural transformation, and that other species of the mitis and the anginosus streptococcal groups use a similar system, has expanded the tools to explore gene function and regulatory pathways in streptococci. Two other classes of pheromones have been discovered since then, comprising the bacteriocin-inducing peptide class found in Streptococcus mutans (also named CSP, although different from the former) and the SigX-inducing peptides (XIP), in the mutans, salivarius, bovis, and pyogenes groups of streptococci...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27920985/the-first-case-of-recurrent-ultra-late-onset-group-b-streptococcal-sepsis-in-a-3-year-old-child
#2
Ai Hosoda, Ryohei Gatayama, Shiori Moriyama, Noriyuki Ishii, Kenichiro Yamada, Youhei Matsuzaki, Masayoshi Shinjoh
Group B streptococcus (GBS) is a commonly recognized cause of sepsis and meningitis in neonatal and young infants. Invasive GBS infection is classified into early onset GBS disease (EOD, day 0-6), late onset GBS disease (LOD, day 7-89) and ultra late onset GBS disease (ULOD, after 3 months of age). ULOD is uncommon and recurrence is especially rare. We present the first recurrent case of ULOD GBS sepsis in 3-year-old girl with a past medical history of hydrops fetalis and thoracic congenital lymphatic dysplasia...
2017: IDCases
https://www.readbyqxmd.com/read/27920580/positive-clinical-outcomes-derived-from-using-streptococcus-salivarius-k12-to-prevent-streptococcal-pharyngotonsillitis-in-children-a-pilot-investigation
#3
Francesco Di Pierro, Maria Colombo, Alberto Zanvit, Amilcare S Rottoli
BACKGROUND: Streptococcus salivarius K12 (BLIS K12(®)) is a probiotic strain producing the bacteriocins salivaricin A2 and salivaricin B, both of which strongly antagonize the growth of Streptococcus pyogenes, the most important bacterial cause of pharyngeal infections in humans. It successfully colonizes and exhibits persistence in the oral cavity and is endowed with an excellent safety profile. Previous observations of a small group of children indicated that the use of BLIS K12 could also reduce the occurrence of viral pharyngitis...
2016: Drug, Healthcare and Patient Safety
https://www.readbyqxmd.com/read/27918954/interleukin-10-role-in-increasing-susceptibility-and-pathogenesis-of-rheumatic-fever-rheumatic-heart-disease
#4
REVIEW
Neha Sharma, Devinder Toor
Streptococcus pyogenes (group A streptococcus) causes rheumatic fever (RF) which later progresses towards rheumatic heart disease (RHD) in the susceptible individuals. RF and RHD both contribute towards increasing global burden of disease, especially in developing countries. RHD is one of the most common acquired heart diseases causing permanent damage to heart valves which ultimately leads to heart failure. In RHD, heart valve lesions are formed which are mediated by autoimmune reaction between streptococcal antigens (M protein and group A carbohydrate epitope GlcNAc) and heart tissues...
December 2, 2016: Cytokine
https://www.readbyqxmd.com/read/27903001/right-in-front-of-our-eyes-evolution-of-streptococcal-toxic-shock-syndrome-with-ischemic-optic-neuropathy
#5
Salaheldin M Elhamamsy, Mazen O Al-Qadi, Taro Minami, Marguerite Neill
INTRODUCTION: Toxic shock syndrome occurs from dysregulation of host inflammatory responses. Toxin- producing strains of Group A streptococcus cause TSS. Ischemic optic neuropathy rarely complicates septic shock. We present a rare case of streptococcal pharyngitis complicated by septic arthritis and TSS with reversible blindness due to non-arteritic ischemic optic neuropathy. CASE: A 28-year-old man drove to our ED with exudative pharyngitis. A rapid streptococcal test was positive...
December 1, 2016: Rhode Island Medical Journal
https://www.readbyqxmd.com/read/27890396/structure-based-design-of-broadly-protective-group-a-streptococcal-m-protein-based-vaccines
#6
James B Dale, Pierre R Smeesters, Harry S Courtney, Thomas A Penfound, Claudia M Hohn, Jeremy C Smith, Jerome Y Baudry
BACKGROUND: A major obstacle to the development of broadly protective M protein-based group A streptococcal (GAS) vaccines is the variability within the N-terminal epitopes that evoke potent bactericidal antibodies. The concept of M type-specific protective immune responses has recently been challenged based on the observation that multivalent M protein vaccines elicited cross-reactive bactericidal antibodies against a number of non-vaccine M types of GAS. Additionally, a new "cluster-based" typing system of 175M proteins identified a limited number of clusters containing closely related M proteins...
January 3, 2017: Vaccine
https://www.readbyqxmd.com/read/27885814/trends-microbiology-and-outcomes-of-infective-endocarditis-in-children-during-2000-2010-in-the-united-states
#7
Shipra Gupta, Ankit Sakhuja, Eric McGrath, Basim Asmar
BACKGROUND: We studied the incidence, trend, underlying conditions, microbiology, and outcomes of infective endocarditis (IE) in children during 11 years using Nationwide Inpatient Sample (NIS) database. This is the largest all-payer inpatient care database in the United States containing data for more than 8 million hospital stays from over 1000 hospitals. METHODS: NIS data from 2000 to 2010 of primary discharge diagnosis of IE in children aged ≤19 years old were studied...
November 25, 2016: Congenital Heart Disease
https://www.readbyqxmd.com/read/27874935/effect-of-administration-of-streptococcus-salivarius-k12-on-the-occurrence-of-streptococcal-pharyngo-tonsillitis-scarlet-fever-and-acute-otitis-media-in-3-years-old-children
#8
F Di Pierro, M Colombo, M G Giuliani, M L Danza, I Basile, T Bollani, A M Conti, A Zanvit, A S Rottoli
OBJECTIVE: Streptococcus salivarius K12 (BLIS K12) is a probiotic strain strongly antagonistic to the growth of Streptococcus pyogenes, the most important bacterial cause of pharyngeal infections in humans. Shown to colonize the oral cavity and to be safe for human use, BLIS K12 has previously been reported to reduce pharyngo-tonsillitis episodes in children or adults known to have experienced recurrent streptococcal infection. The present study was focussed upon evaluating the role of BLIS K12 in the control of streptococcal disease and acute otitis media in children attending the first year of kindergarten...
November 2016: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/27870815/the-cape-town-clinical-decision-rule-for-streptococcal-pharyngitis-in-children
#9
Mark Emmanuel Engel, Karen Cohen, Ronald Gounden, Andre P Kengne, Dylan Dominic Barth, Andrew C Whitelaw, Veronica Francis, Motasim Badri, Annemie Stewart, James B Dale, Bongani M Mayosi, Gary Maartens
BACKGROUND: Existing clinical decision rules (CDR) to diagnose group A streptococcal (GAS) pharyngitis have not been validated in sub-Saharan Africa. We developed a locally applicable CDR while evaluating existing CDRs for diagnosing GAS pharyngitis in South African children. METHODS: We conducted a prospective cohort study and enrolled 997 children aged 3-15 years presenting to primary care clinics with a complaint of sore throat, and whose parents provided consent...
November 18, 2016: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/27867430/evaluation-in-mouse-model-of-combined-virus-bacterial-vaccine-based-on-attenuated-influenza-a-h7n3-virus-and-the-group-b-streptococcus-recombinant-polypeptides
#10
Yulia A Desheva, Galina F Leontieva, Tatiana A Kramskaya, Tatiana A Smolonogina, Kornelia B Grabovskaya, Irina V Kiseleva, Larisa G Rudenko, Alexander N Suvorov
BACKGROUND: Secondary bacterial influenza complications are a common cause of excesses morbidity and mortality, which determines the need to develop means for specific prophylaxis. Group B streptococcal infection is especially common cause of pneumonia among children and the elderly with underlying conditions. Here we investigate in a mouse model the effects of combined intranasal immunization using live attenuated influenza vaccine and recombinant polypeptides based on group B Streptococcus surface proteins...
2016: Open Microbiology Journal
https://www.readbyqxmd.com/read/27862152/cutaneous-polyarteritis-nodosa-localized-to-a-region-of-lymphedema-secondary-to-streptococcus-viridans-cellulitis-and-multiple-surgeries
#11
Andrew Matsumoto, Rami N Al-Rohil, Marina Bravin, Lori Anderson, Danielle Wroblewski, J Andrew Carlson
Cutaneous polyarteritis nodosa (CPAN) is a chronic, indolent, single organ arteritis that generally presents with lower extremity nodules and/or livedo racemosa, accompanied by malaise and arthralgias. CPAN is often triggered by infection, commonly Group A streptococcal species, and is considered an autoimmune reaction. Scarring from surgery and obliterative lymphangiitis from bacterial cellulitis are causes of lymphedema. Lymphedematous skin is predisposed to autoimmune disorders. Herein we report a 53yo woman who developed CPAN restricted to a localized area of the right upper arm-shoulder that had undergone multiple surgeries, complicated by episodes of Streptococcus viridans cellulitis...
November 10, 2016: Journal of Cutaneous Pathology
https://www.readbyqxmd.com/read/27853322/risk-factors-for-group-b-streptococcal-disease-in-neonates-of-mothers-with-negative-antenatal-testing
#12
V Parente, R H Clark, L Ku, C Fennell, M Johnson, E Morris, A Romaine, U Utin, D K Benjamin, J A Messina, P B Smith, R G Greenberg
OBJECTIVE: The aim of this study was to identify risk factors for early-onset group B Streptococcus (EOGBS) disease in neonates of mothers with negative antenatal screening. STUDY DESIGN: We performed a retrospective cohort study of neonates born to mothers with negative antenatal GBS screening between 2002 and 2012. Our primary outcome was EOGBS infection. We used multivariable logistic regression to assess factors associated with EOGBS. RESULTS: EOGBS was confirmed in 492 of the 179 818 neonates that met the study inclusion criteria...
November 17, 2016: Journal of Perinatology: Official Journal of the California Perinatal Association
https://www.readbyqxmd.com/read/27851652/2018-isolated-necrotizing-anterior-tibialis-myositis-from-group-a-streptococcal-infection
#13
Alisha Jiwani, Reinaldo Morales, Kevin Chung
No abstract text is available yet for this article.
December 2016: Critical Care Medicine
https://www.readbyqxmd.com/read/27851616/1982-group-a-streptococcal-bacteremia-from-necrotizing-pneumonia-in-a-healthy-adult-a-rare-case
#14
Komal Patel, Vishad Sheth, Kruthika Reddy, Ana Maheshwari, Junad Chowdhury, Nicolas Castellano
No abstract text is available yet for this article.
December 2016: Critical Care Medicine
https://www.readbyqxmd.com/read/27848904/-a-postpartum-woman-with-toxic-shock-syndrome-group-a-streptococcal-infection-a-much-feared-postpartum-complication
#15
K Abbink, J C Kortekaas, M P Buise, J Dokter, S M I Kuppens, T H M Hasaart
BACKGROUND: The development of toxic shock syndrome (TSS) after an invasive group A streptococcal (GAS) infection in the postpartum period is a much feared complication. The mortality rate of TSS with necrotizing fasciitis is 30 to 50%. CASE DESCRIPTION: We present the case of a woman with atypical pelvic pain which was the first symptom of toxic shock syndrome as a consequence of a GAS infection. Clinical deterioration necessitated a hysterectomy. Also a fasciotomy was performed as consequence of lower extremity compartment syndrome...
2016: Nederlands Tijdschrift Voor Geneeskunde
https://www.readbyqxmd.com/read/27832918/changes-in-empyema-among-u-s-children-in-the-pneumococcal-conjugate-vaccine-era
#16
Andrew D Wiese, Marie R Griffin, Yuwei Zhu, Edward F Mitchel, Carlos G Grijalva
BACKGROUND: Parapneumonic empyema, a serious complication of pneumonia, started increasing among U.S. children before the introduction of the 7-valent pneumococcal conjugate vaccine (PCV7) in 2000, and continued afterwards. This increase was due in part to pneumococcal serotypes not included in PCV7 that were included in the new 13-valent (PCV13) vaccine introduced in 2010. We assessed changes in the incidence of empyema hospitalizations among U.S. children after PCV13 introduction. METHODS: We calculated annualized empyema hospitalization rates among U...
December 7, 2016: Vaccine
https://www.readbyqxmd.com/read/27819714/patient-reported-outcomes-and-clinical-response-in-patients-with-moderate-to-severe-plaque-psoriasis-treated-with-tonsillectomy-a-randomized-controlled-trial
#17
Ragna Hlin Thorleifsdottir, Sigrun Laufey Sigurdardottir, Bardur Sigurgeirsson, Jón Hjaltalin Olafsson, Martin Ingi Sigurdsson, Hannes Petersen, Johann Eli Gudjonsson, Andrew Johnston, Helgi Valdimarsson
Psoriasis is a chronic inflammatory skin disease with profound effects on patients' health-related quality of life (HRQoL). Twenty-nine patients with plaque psoriasis and a history of streptococcal-associated psoriasis exacerbations were randomly assigned to tonsillectomy (n = 15) or control (n = 14) groups and followed for 24 months. Patients were evaluated with the Psoriasis Disability Index, Psoriasis Life Stress Inventory and Psoriasis Area and Severity Index. HRQoL and psoriasis-related stress improved significantly in the tonsillectomy group compared with the control group (p = 0...
November 7, 2016: Acta Dermato-venereologica
https://www.readbyqxmd.com/read/27803422/recurrent-streptococcus-agalactiae-toxic-shock-syndrome-triggered-by-a-tumor-necrosis-factor-%C3%AE-inhibitor
#18
Masataka Yoshida, Takahiro Takazono, Masato Tashiro, Tomomi Saijo, Yoshitomo Morinaga, Kazuko Yamamoto, Shigeki Nakamura, Yoshifumi Imamura, Taiga Miyazaki, Toyomitsu Sawai, Tomoya Nishino, Koichi Izumikawa, Katsunori Yanagihara, Hiroshi Mukae, Shigeru Kohno
Streptococcal toxic shock syndrome caused by group B streptococcus (GBS) is a rare, but lethal disease. We experienced a 45-year-old woman with pustular psoriasis who developed toxic shock-like syndrome during infliximab treatment. Surprisingly, similar episodes recurred three times in one year with restarting of infliximab treatments. In the third episode, GBS were detected in blood, urine, and vaginal secretion cultures. These episodes of shock syndrome were possibly due to GBS. To the best of our knowledge, this is the first case report of recurrent streptococcal toxic shock syndrome possibly caused by GBS which was induced by anti-TNF-α inhibitor therapy...
2016: Internal Medicine
https://www.readbyqxmd.com/read/27803183/a-two-component-regulatory-system-impacts-extracellular-membrane-derived-vesicle-production-in-group-a-streptococcus
#19
Ulrike Resch, James Anthony Tsatsaronis, Anaïs Le Rhun, Gerald Stübiger, Manfred Rohde, Sergo Kasvandik, Susanne Holzmeister, Philip Tinnefeld, Sun Nyunt Wai, Emmanuelle Charpentier
: Export of macromolecules via extracellular membrane-derived vesicles (MVs) plays an important role in the biology of Gram-negative bacteria. Gram-positive bacteria have also recently been reported to produce MVs; however, the composition and mechanisms governing vesiculogenesis in Gram-positive bacteria remain undefined. Here, we describe MV production in the Gram-positive human pathogen group A streptococcus (GAS), the etiological agent of necrotizing fasciitis and streptococcal toxic shock syndrome...
November 1, 2016: MBio
https://www.readbyqxmd.com/read/27803084/severe-soft-tissue-infection-masquerading-as-necrotising-fasciitis-in-a-31-year-old-woman-with-a-background-of-right-thigh-arteriovenous-malformation
#20
Pennylouise Hever, Naveen Cavale, Paul Harnett
A 31-year-old woman with a history of a right thigh arteriovenous malformation presented with an acute history of right thigh pain and swelling. This rapidly progressed to gross sepsis. She was intubated, requiring inotropic support and renal replacement therapy. She was considered disproportionately unwell, with the impression one of necrotising fasciitis (NF). She was taken to theatre for emergency exploration and debridement. There was no evidence of NF to note in theatre. Tissue samples cultured group C Streptococcus, with histopathological examination confirming group C Streptococcal soft tissue infection...
November 1, 2016: BMJ Case Reports
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