Molecular Characterization of Pathogenic Group B Streptococcus From a Tertiary Hospital in Shanxi, China, High Incidence of Sequence Type10 Strains in Infants/Pregnant Women

Publication date: Available online 11 August 2020Source: Journal of Microbiology, Immunology and InfectionAuthor(s): Li Zhang, Lan Ma, Lei Zhu, Xiang-Hong Zhou, Li-Jun Xu, Chao Guo, Jin-Hua Meng, Xin-Hua Zhang, Qing-Hua Liu, Rui Huang
Source: Journal of Microbiology, Immunology and Infection - Category: Microbiology Source Type: research

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Streptococcus agalactiae (group B streptococcus, or GBS) is a common cause of bacteremia and sepsis in newborns, pregnant women, and immunocompromised patients. The molecular mechanisms used by GBS to survive and proliferate in blood are not well understood. Here, using a highly virulent GBS strain and transposon-directed insertion site sequencing (TraDIS), we performed genome-wide screens to discover novel GBS genes required for bacterial survival in human whole blood and plasma. The screen identified 85 and 41 genes that are required for GBS growth in whole blood and plasma, respectively. A common set of 29 genes was req...
Source: Infection and Immunity - Category: Infectious Diseases Authors: Tags: Bacterial Infections Source Type: research
Abstract Streptococcus agalactiae (Group B Streptococcus, GBS) is a common commensal bacterium in adults but remains a leading source of invasive infections in newborns, pregnant women, and the elderly, and more recently, causes an increased incidence of invasive disease in nonpregnant adults. Reduced penicillin susceptibility and emerging resistance to non-β-lactams pose challenges for the development and implementation of novel, nonantimicrobial strategies to reduce the burden of GBS infections. Antimicrobial photodynamic inactivation (aPDI) via the production of singlet oxygen or other reactive oxygen spec...
Source: Free Radical Biology and Medicine - Category: Biology Authors: Tags: Free Radic Biol Med Source Type: research
DISCUSSION: A hexavalent vaccine (serotypes Ia, Ib, II, III, IV and V) might provide comprehensive cover for all at-risk populations. Surveillance of circulating, disease-causing target proteins is useful to inform vaccines not targeting capsular polysaccharide. Addressing data gaps especially by world region and some at-risk populations (notably stillbirths) is fundamental to evidence-based decision-making during vaccine design. PMID: 32888741 [PubMed - as supplied by publisher]
Source: Vaccine - Category: Allergy & Immunology Authors: Tags: Vaccine Source Type: research
CONCLUSIONS: Maternal immunization with the trivalent GBS vaccine in US women had a favorable safety profile, elicited antibodies that were transplacentally transferred and persisted in infants for a minimum of 3 months. CLINICAL TRIAL REGISTRATION:, NCT02046148. PMID: 32883555 [PubMed - as supplied by publisher]
Source: Vaccine - Category: Allergy & Immunology Authors: Tags: Vaccine Source Type: research
We describes a case of a 39-year-old Portuguese woman was seen for her second pregnancy. She had a previous normal delivery and her antenatal course was uncomplicated. She underwent a collection of vaginal and rectal exudates at 34  + 5weeks of gestation, to search for group B Streptococcus (GBS), without isolation.
Source: European Journal of Obstetrics, Gynecology, and Reproductive Biology - Category: OBGYN Authors: Source Type: research
Authors: Fitzgibbon A, Clooney L, Broderick D, Eogan M, McCallion N, Drew RJ Abstract Antimicrobial prophylaxis is widely recommended for pregnant women who have preterm premature rupture of the membranes. Erythromycin prophylaxis was used during an initial period (control) and then changed to intravenous amoxicillin for 48 h, followed by 5 days of oral amoxicillin along with a single dose of azithromycin (case). Healthcare records were reviewed retrospectively. The primary outcome was latency (between membrane rupture and delivery) and the secondary outcomes were mode of delivery, maternal high depen...
Source: Journal of Obstetrics and Gynaecology - Category: OBGYN Tags: J Obstet Gynaecol Source Type: research
This study aimed at estimating the distributions of capsular polysaccharide (CPS) types and pilus profiles, and the rates of antimicrobial resistance among GBS strains isolated from colonized pregnant women and newborns in 2010 –2011 and 2017–2018 in St. Petersburg, Russia. A total of 261 GBS isolates have been investigated. Antibiotic susceptibility testing was performed using the disc-diffusion method. CPS types and pilus profiles were determined by using PCR. Over the 9-year period, the resistance of GBS to both ery thromycin and clindamycin has significantly increased, exceeding 30% in 2017–2018. The ...
Source: European Journal of Clinical Microbiology and Infectious Diseases - Category: Microbiology Source Type: research
Conclusions: The antibiotics used as alternatives to penicillin and ampicillin for the prevention of maternal-fetal GBS disease are poorly studied, and this study indicate that cefazolin can be an optimal choice, offering safety in the use of this antibiotic in situations where penicillins are contraindicated or unavailable.
Source: The Journal of Infection in Developing Countries - Category: Infectious Diseases Source Type: research
Immunization during pregnancy has been recommended in an increasing number of countries. The aim of this strategy is to protect pregnant women and infants from severe infectious disease, morbidity and mortality and is currently limited to tetanus, inactivated influenza, and pertussis-containing vaccines. There have been recent advancements in the development of vaccines designed primarily for use in pregnant women (respiratory syncytial virus and group B Streptococcus vaccines). Although there is increasing evidence to support vaccination in pregnancy, important gaps in knowledge still exist and need to be addressed by fut...
Source: Frontiers in Immunology - Category: Allergy & Immunology Source Type: research
This article examines the role of screening and treatment, evidence-based guidelines, and practice patterns to provide clarification and resolve local practice disparities.
Source: The Nurse Practitioner - Category: Nursing Tags: Feature: WOMEN'S HEALTH: CE Connection Source Type: research
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