Background: A multidrug-resistant (MDR) RR2 gene cluster was identified by whole-genome sequencing in several highly virulent (ST-17) Group B streptococcus (GBS) isolates, which caused neonatal invasive infections in southern China in 2016. Tracing the transmission and distribution of MDR isolates in this area is important for the effective management of future infections. The aim of this study was to obtain longitudinal data of MDR isolates to monitor epidemiological trends of general common isolates in southern China, and provide evidence for future characterization of antimicrobial resistance mechanisms.
Methods: Clinical information and antimicrobial susceptibility of GBS isolates were acquired from electronic information management system databases of the hospital under study between January 2011 and December 2017. To confirm the presence of intact RR2, the , , , and genes located upstream, midstream, and downstream of RR2 were detected by PCR and DNA sequencing.
Results: A total of 149 cases of neonatal invasive GBS infection were identified during the period 2011-2017. Among them, 119 cases (79.9%) were caused by MDR isolates, with a general increasing trend over the past 7 years. Further characterization of 11 isolates showed that six isolates causing late-onset disease (LOD) carry the , , and genes, which are located on RR2. Moreover, and consistently co-occurred in GBS isolates, which suggests their close proximity to one another in the RR2 gene cluster.
Conclusion: The MDR GBS is responsible for a large number of neonatal invasive infections and occurs with increasing frequency over time. Particularly, the MDR GBS isolates that cause LOD are more likely to carry the RR2 gene cluster, compared with those that cause early-onset disease. The rise in number of MDR GBS isolates emphasizes the pressing need for continuous surveillance to monitor their antibiotic susceptibility and epidemiology.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6292236 | PMC |
| http://dx.doi.org/10.2147/IDR.S178717 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
[Examination of Capsule Genotypes, Antibiotic Susceptibility Profiles and Biofilm Forming Abilities of Group B Streptococcus Isolates Isolated from Pregnant Women].
Mikrobiyol Bul
October 2024
Çukurova University Faculty of Medicine, Department of Medical Microbiology, Adana, Türkiye.
Group B Streptococcus (GBS) or Streptococcus agalactiae is a pathogen that causes infections during pregnancy. The aim of this study was to investigate the antibiotic sensitivity profiles, capsule genotypes and biofilm forming capabilities of GBS isolates obtained from pregnant women . The study included 252 pregnant women who applied to Adana Gynecology and Children's Hospital between 2018 and 2023.
View Article and Find Full Text PDFMolecular epidemiology of invasive group B Streptococcus in South Africa, 2019-2020.
J Infect Dis
December 2024
Centre for Respiratory Diseases and Meningitis, National Institute for Communicable Diseases, a division of the National Health Laboratory Service, Johannesburg, South Africa.
Background: Group B Streptococcus (GBS) is a leading cause of neonatal meningitis and sepsis and an important cause of disease in adults. Capsular polysaccharide and protein-based GBS vaccines are currently under development.
Methods: Through national laboratory-based surveillance, invasive GBS isolates were collected from patients of all ages between 2019 and 2020.
Bacterial meningitis in a quaternary NICU: A multiyear retrospective study.
Medicine (Baltimore)
December 2024
University of Pennsylvania, Philadelphia, PA.
Bacterial meningitis causes significant morbidity and mortality in infants. Lumbar punctures are often deferred until the results of blood cultures are known and sometimes not considered, making this population susceptible to a missed diagnosis. There are few studies describing the epidemiology of neonatal meningitis in quaternary neonatal intensive care unit settings.
View Article and Find Full Text PDFSerotype distribution and clinical characteristics of Group B Streptococcus Bacteremia in nonpregnant adults: a 15-Year Multicenter Study in Korea.
BMC Infect Dis
December 2024
Department of Infectious Diseases, Chonnam National University Hospital, Gwang-ju, Republic of Korea.
Background: Group B Streptococcus (GBS) bacteremia in nonpregnant adults is of increasing concern, particularly among the elderly in underlying conditions. This study analyzed the serotype distribution, antimicrobial resistance patterns, and clinical characteristics of GBS bacteremia in nonpregnant adults over a 15-year period in two tertiary hospitals in Korea.
Methods: From 2007 to 2021, patients aged ≥ 19 years with GBS bacteremia were identified via retrospective electronic medical record review.
Maternal group B decreases infant length and alters the early-life microbiome: a prospective cohort study.
Ann Med
December 2025
Department of Laboratory Medicine, Microbiome Medicine Center, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, China.
Background: Maternal colonization with Group B Streptococcus (GBS) disrupts the vaginal microbiota, potentially affecting infant microbiota assembly and growth. While the gut microbiota's importance in infant growth is recognized, the specific effects of maternal GBS on growth remain unclear. This study aimed to explore the effects of maternal vaginal GBS during pregnancy on early infant growth, microbiome, and metabolomics.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!