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Streptococcus group B

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https://www.readbyqxmd.com/read/28817995/intrapartum-test-for-detection-of-group-b-streptococcus-colonization-during-labor
#1
Elena Picchiassi, Giuliana Coata, Giulia Babucci, Irene Giardina, Valentina Summa, Federica Tarquini, Michela Centra, Vittorio Bini, Benito Cappuccini, Gian Carlo Di Renzo
PURPOSE: To evaluate the potential improvement of introducing an intrapartum test for the detection of Group B Streptococcus (GBS) during labor and to estimate its cost-effectiveness versus antepartum GBS screening culture. MATERIALS AND METHODS: Three hundred thirteen women at beginning of labor, with unknown GBS status or with antepartum GBS screening culture were enrolled. A vaginal-rectal specimen was collected from each woman for GBS detection by real time PCR...
August 17, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28817704/analysis-of-multidrug-resistant-group-b-streptococci-with-reduced-penicillin-susceptibility-forming-small-less-hemolytic-colonies
#2
Hirotsugu Banno, Kouji Kimura, Yosuke Tanaka, Tsuyoshi Sekizuka, Makoto Kuroda, Wanchun Jin, Jun-Ichi Wachino, Keiko Yamada, Keigo Shibayama, Yoshichika Arakawa
Group B streptococci (GBS; Streptococcus agalactiae) are the leading cause of neonatal invasive diseases and are also important pathogens for elderly adults. Until now, nearly all GBS with reduced penicillin susceptibility (PRGBS) have shown β-hemolytic activity and grow on sheep blood agar. However, we have previously reported three PRGBS clinical isolates harboring a CylK deletion that form small less hemolytic colonies. In this study, we examined the causes of small, less hemolytic colony formation in these clinical isolates...
2017: PloS One
https://www.readbyqxmd.com/read/28814408/intrinsic-maturational-neonatal-immune-deficiencies-and-susceptibility-to-group-b-streptococcus-infection
#3
REVIEW
Michelle L Korir, Shannon D Manning, H Dele Davies
Although a normal member of the gastrointestinal and vaginal microbiota, group B Streptococcus (GBS) can also occasionally be the cause of highly invasive neonatal disease and is an emerging pathogen in both elderly and immunocompromised adults. Neonatal GBS infections are typically transmitted from mother to baby either in utero or during passage through the birth canal and can lead to pneumonia, sepsis, and meningitis within the first few months of life. Compared to the adult immune system, the neonatal immune system has a number of deficiencies, making neonates more susceptible to infection...
October 2017: Clinical Microbiology Reviews
https://www.readbyqxmd.com/read/28813477/colonization-prevalence-and-antibiotic-susceptibility-of-group-b-streptococcus-in-pregnant-women-over-a-6-year-period-in-dongguan-china
#4
Wenjing Ji, Lihua Zhang, Zhusheng Guo, Shujin Xie, Weiqing Yang, Junjian Chen, Jiamin Wang, Zhiqin Cheng, Xin Wang, Xuehai Zhu, Jianwen Wang, Haiqing Wang, Juan Huang, Ning Liang, David J McIver
This study investigated the prevalence of recto-vaginal Group B Streptococcus (GBS) colonization, serotype distribution, and antimicrobial susceptibility patterns among pregnant women in Dongguan, China. Recto-vaginal swabs were collected from pregnant women at gestational age 35-37 weeks between January 1st 2009 and December 31st 2014. Isolates were serotyped by latex-agglutination and were tested against seven antimicrobials by disk diffusion. Of 7,726 pregnant women who completed GBS testing, 636 (8.2%) were GBS carriers...
2017: PloS One
https://www.readbyqxmd.com/read/28807000/necrotizing-streptococcal-myositis-of-the-upper-extremity-a-case-report
#5
Johannes C Reichert, Götz Habild, Paul Simon, Ulrich Nöth, Jan B Krümpelmann
BACKGROUND: Necrotizing myositis is a rare but life-threatening soft-tissue infection characterized by rapidly spreading inflammation and subsequent necrosis of the affected tissue. The myositis is often caused by toxin-producing, virulent bacteria such as group A β-hemolytic streptococcus and associated with severe systemic toxicity. It is rapidly fatal unless diagnosed promptly and treated aggressively. However, necrotizing myositis is often initially misdiagnosed as a more benign soft-tissue infection as such fulminant, invasive muscle infections are rare with no more than 30 cases reported over the last century...
August 15, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28805176/estimating-the-risk-of-invasive-group-a-streptococcus-infection-in-care-home-residents-in-england-2009-2010
#6
M Saavedra-Campos, B Simone, S Balasegaram, A Wright, M Usdin, T Lamagni
Invasive group A streptococcal (iGAS) infections cause severe disease and death, especially in residents of long-term care facilities (LTCFs). In order to inform iGAS prevention, we compared the risk of iGAS in LTCF residents and community residents. We identified LTCF residents among cases of iGAS from national surveillance (2009-2010) using postcode matching, and cases of hospital-acquired infections via hospital admission records. We used Poisson regression to calculate incidence rate ratios (IRR) and logistic regression to explore factors associated with case fatality rate (CFR)...
August 14, 2017: Epidemiology and Infection
https://www.readbyqxmd.com/read/28798146/bloody-stools-in-a-3-day-old-term-infant
#7
Amelia Bray-Aschenbrenner, L Richard Feldenberg, Amelia Kirby, Colleen M Fitzpatrick, Justin B Josephsen
A 3-day-old term, male infant presented to the emergency department for evaluation of bloody stools. The infant was born after an uncomplicated pregnancy followed by a normal spontaneous vaginal delivery. The mother was group B Streptococcus colonized, and received antenatal penicillin prophylaxis. The infant received routine delivery room care, and was given ophthalmic erythromycin and intramuscular vitamin K. Circumcision was performed without bleeding and he was discharged from the newborn nursery and the hospital after 48 hours...
August 10, 2017: Pediatrics
https://www.readbyqxmd.com/read/28783696/il-1%C3%AE-is-an-innate-immune-sensor-of-microbial-proteolysis
#8
Christopher N LaRock, Jordan Todd, Doris L LaRock, Joshua Olson, Anthony J O'Donoghue, Avril A B Robertson, Matthew A Cooper, Hal M Hoffman, Victor Nizet
Interleukin-1β (IL-1β) is a key proinflammatory cytokine that drives antimicrobial immune responses. IL-1β is aberrantly activated in autoimmune diseases, and IL-1β inhibitors are used as therapeutic agents to treat patients with certain autoimmune disorders. Review of postmarketing surveillance of patients receiving IL-1β inhibitors found a disproportionate reporting of invasive infections by group A Streptococcus (GAS). IL-1β inhibition increased mouse susceptibility to GAS infection, but IL-1β was produced independent of canonical inflammasomes...
August 19, 2016: Science Immunology
https://www.readbyqxmd.com/read/28783687/group-b-streptococcus-circumvents-neutrophils-and-neutrophil-extracellular-traps-during-amniotic-cavity-invasion-and-preterm-labor
#9
Erica Boldenow, Claire Gendrin, Lisa Ngo, Craig Bierle, Jay Vornhagen, Michelle Coleman, Sean Merillat, Blair Armistead, Christopher Whidbey, Varchita Alishetti, Veronica Santana-Ufret, Jason Ogle, Michael Gough, Sengkeo Srinouanprachanh, James W MacDonald, Theo K Bammler, Aasthaa Bansal, H Denny Liggitt, Lakshmi Rajagopal, Kristina M Adams Waldorf
Preterm birth is a leading cause of neonatal morbidity and mortality. Although microbial invasion of the amniotic cavity (MIAC) is associated with most early preterm births, the temporal events that occur during MIAC and preterm labor are not known. Group B streptococci (GBS) are β-hemolytic, Gram-positive bacteria, which commonly colonize the vagina but have been recovered from the amniotic fluid in preterm birth cases. To understand temporal events that occur during MIAC, we used a chronically catheterized nonhuman primate model that closely emulates human pregnancy...
October 14, 2016: Science Immunology
https://www.readbyqxmd.com/read/28783417/molecular-characterization-of-italian-isolates-of-fluoroquinolone-resistant-streptococcus-agalactiae-and-relationships-with-chloramphenicol-resistance
#10
Serena Simoni, Chiara Vincenzi, Andrea Brenciani, Gianluca Morroni, Patrizia Bagnarelli, Eleonora Giovanetti, Pietro E Varaldo, Marina Mingoia
A total number of 368 clinical isolates of Streptococcus agalactiae (group B Streptococcus, GBS) were collected in 2010-2016 from three hospitals in a region of central Italy. Fluoroquinolone (FQ)-resistant isolates were selected using levofloxacin. Levofloxacin-resistant (LR) strains (11/368, 2.99%) were characterized for several features, and their FQ resistance was analyzed phenotypically and genotypically using seven additional FQs. Their gyrA and parC quinolone resistance-determining regions were sequenced...
August 7, 2017: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/28779876/detection-of-streptococcus-agalactiae-by-immunochromatography-with-group-b-streptococcus-specific-surface-immunogenic-protein-in-pregnant-women
#11
Yoko Takayama, Hidehito Matsui, Yuzuru Adachi, Shin Nihonyanagi, Tatsuhiko Wada, Junko Mochizuki, Nobuya Unno, Hideaki Hanaki
BACKGROUND: Infection with Streptococcus agalactiae (Group B streptococcus: GBS) is a significant cause of morbidity and mortality in neonates. Screening for GBS is mainly done by culture-based methods, but a reliable result may take several days to obtain and culture is difficult to perform at institutions without a laboratory. We evaluated an immunochromatography method for rapid detection of GBS-specific surface immunogenic protein (Sip) using anti-Sip monoclonal antibodies. MATERIALS AND METHODS: A total of 377 cervical and vaginal swabs collected during weeks 35-37 of gestation were inoculated into GBS medium F and incubated...
August 2, 2017: Journal of Infection and Chemotherapy: Official Journal of the Japan Society of Chemotherapy
https://www.readbyqxmd.com/read/28776526/common-bacterial-isolates-clinical-outcome-and-tb-meningitis-in-children-admitted-at-morogoro-regional-referral-hospital-tanzania
#12
Ramadhani Salum Chambuso, Mkhoi Lord Mkhoi, Evelyn Kaambo
BACKGROUND: Bacterial meningitis is still one of the major causes of deaths, disabilities, and mental retardation in children in Morogoro region. To study the current meningitis burden, we evaluated the common bacterial isolates and clinical outcome of the disease in the region. METHODS: We conducted a hospital-based prospective study on 1352 children aged between 7 days and 12 years admitted in pediatric wards at Morogoro Regional Referral Hospital for 7 months...
July 2017: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28776463/prevalence-and-impact-of-sexually-transmitted-infections-in-pregnant-women-in-central-ethiopia
#13
Andreas Schönfeld, Torsten Feldt, Tafese B Tufa, Hans M Orth, André Fuchs, Million G Mesfun, Frieder Pfäfflin, Tamara Nordmann, Matthias Breuer, Monika Hampl, Dieter Häussinger
Human immunodeficiency virus (HIV) continues to be a major global public health issue and omnipresent sexually transmitted infections (STIs) increase the risk of HIV acquisition. Moreover, STIs and HIV in pregnant women can harm the unborn child. In this study, we systematically investigated the prevalence of HIV, relevant STIs and vaginal group B streptococcus colonization among pregnant women presenting at Asella Teaching Hospital in central Ethiopia and their effect on perinatal mortality. A follow-up was performed six weeks after delivery...
January 1, 2017: International Journal of STD & AIDS
https://www.readbyqxmd.com/read/28776170/viridans-group-streptococci-bloodstream-infections-in-neutropenic-adult-patients-with-hematologic-malignancy-single-center-experience
#14
J Radocha, P Paterová, A Zavřelová, B Víšek, F Gabalec, H Žemličková, P Žák
Viridans group streptococci bloodstream infections (VGS BSI) remain a significant cause of mortality and morbidity in patients with severe neutropenia. The goal of our study was to evaluate clinical course and microbiological susceptibility of VGS BSI at our center. Retrospective analysis of all microbiologically documented bloodstream infections caused by VGS during the 9-year time period (from January 2006 until December 2014) was carried out. Only patients with severe neutropenia (< 500/μL) were included in the study...
August 3, 2017: Folia Microbiologica
https://www.readbyqxmd.com/read/28767617/prevalence-of-group-b-streptococcus-in-pregnant-women-in-iran-a-systematic-review-and-meta-analysis
#15
Mohammad Emaneini, Fereshteh Jabalameli, Willem B van Leeuwen, Reza Beigverdi
BACKGROUND: Group B Streptococcus (GBS or S. agalactiae) is a major cause of severe disease in neonates. In perinatal infections or early-onset disease (EOD), GBS is transmitted vertically to the newborn from the birth canal during labor and delivery. Limited information is available on the prevalence of GBS recto-vaginal colonization among pregnant women in Iran. METHODS: We performed a systematic search by using different electronic databases including: Medline (via Pubmed), Embase, Web of Science, and Iranian Database...
July 27, 2017: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/28764569/screening-for-group-b-streptococcus-gbs-at-labour-onset-using-pcr-accuracy-and-potential-impact-a-pilot-study
#16
Sandhya Ramesh Babu, Rachel McDermott, Irum Farooq, David Le Blanc, Wendy Ferguson, Naomi McCallion, Richard Drew, Maeve Eogan
This pilot study assessed the diagnostic accuracy and potential impact of a rapid PCR-based screening test for the detection of group B Streptococcus (GBS) at the onset of labour for the purpose of optimising intrapartum antibiotic prophylaxis (IAP). Vaginal and rectal swabs from a convenience sample of 158 women were analysed by conventional broth-enriched culture and a rapid PCR test. Overall, GBS carriage was 18.98% by culture and 19.62% by PCR. PCR for the detection of GBS had a sensitivity of 93.1%, specificity of 96...
August 1, 2017: Journal of Obstetrics and Gynaecology: the Journal of the Institute of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/28763075/-group-b-streptococcal-perinatal-infection-a-global-latin-american-and-mexican-overview
#17
Gerardo C Palacios-Saucedo, Talyha Itzel Hernández-Hernández, Lydia Guadalupe Rivera-Morales, Evangelina Briones-Lara, Amílcar Caballero-Trejo, José M Vázquez-Guillén, Gustavo I Amador-Patiño, Ricardo García-Cabello, Fortino Solórzano-Santos, Cristina Rodríguez-Padillacs
Group B streptococci (Streptococcus agalactiae) cause a number of infections in women during pregnancy and postpartum, such as urinary tract infection, chorioamnionitis and endometritis, consequently may affect the newborn. Group B streptococci is the most common cause of severe infections in newborns in developed countries. Studies on the epidemiology of group B streptococci infections in Latin America are still limited. This information is also unknown in Mexico, but studies carried out in the center of the country have found high rates of vaginal colonization in pregnant women and there are case series and case reports of newborns...
May 2017: Gaceta Médica de México
https://www.readbyqxmd.com/read/28762570/streptococcal-toxic-shock-syndrome-occurring-in-the-third-trimester-of-pregnancy-a-case-report
#18
Mohamad Irani, Rodney McLaren, Richard H Savel, Oksana Bogatyryova, Fady Khoury-Collado
Group A streptococcal (GAS) toxic shock syndrome (TSS) is a rare life-threatening illness. Most reported cases have occurred in the post-partum period. Here, we report a rare case of a primigravid who developed GAS TSS in the third trimester. We also review the potential preventive measures and treatment modalities for this syndrome. A 29-year-old primigravid presented at 36 weeks' gestation with diarrhea, abdominal pain, fever, and fetal bradycardia. She underwent an emergency cesarean section and was subsequently diagnosed with GAS TSS...
August 1, 2017: Journal of Obstetrics and Gynaecology Research
https://www.readbyqxmd.com/read/28757019/genomic-comparison-of-virulent-and-non-virulent-serotype-v-st1-streptococcus-agalactiae-in-fish
#19
Rui Wang, Li-Ping Li, Ting Huang, Ai-Ying Lei, Yan Huang, Fu-Guang Luo, Dong-Ying Wang, Wei-Yi Huang, Ming Chen, Jun Huang
Streptococcus agalactiae or Group B Streptococcus (GBS) is the major pathogen causing pneumonia and meningitis in human, mastitis in dairy cows, and streptococcal disease in tilapia. Previous studies have shown that fish GBS strains are correlated with human GBS strains in evolution and might have cross-host infection ability. Although the invasive disease caused by ST1 GBS in non-pregnant adults and cows is increasing worldwide, infection of fish by ST1 GBS has not been reported. The aim of this study was to determine whether ST1 GBS was virulent in fish and to investigate the genomic characteristics of ST1 GBS strains with different pathogenicity in tilapia...
August 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28747160/adverse-events-in-women-and-children-who-have-received-intrapartum-antibiotic-prophylaxis-treatment-a-systematic-review
#20
Farah Seedat, Chris Stinton, Jacoby Patterson, Julia Geppert, Bee Tan, Esther R Robinson, Noel Denis McCarthy, Olalekan A Uthman, Karoline Freeman, Samantha Ann Johnson, Hannah Fraser, Colin Stewart Brown, Aileen Clarke, Sian Taylor-Phillips
BACKGROUND: Adverse events from intrapartum antibiotic prophylaxis (IAP) are poorly documented yet essential to inform clinical practice for neonatal group B Streptococcus (GBS) disease prevention. In this systematic review, we appraised and synthesised the evidence on the adverse events of IAP in the mother and/or her child. METHODS: We searched MEDLINE, MEDLINE In-Process & Other Non-Indexed Citations, EMBASE, Cochrane, and Science Citation Index from date of inception until October 16th 2016...
July 26, 2017: BMC Pregnancy and Childbirth
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