Related Experiment Video
Updated: Jul 13, 2026

10:19
A Murine Model of Group B Streptococcus Vaginal Colonization
Published on: November 16, 2016
Group B streptococcal infections in the postgenomic era
Future Microbiology
|July 31, 2007
Summary
Group B streptococci (GBS) invade host cells, causing neonatal infections. Research uses molecular methods to understand GBS virulence and develop new treatments for bacterial pneumonia.
Area of Science:
- Pediatric Infectious Diseases
- Microbiology
- Molecular Pathogenesis
Background:
- Group B streptococci (GBS) invade eukaryotic cells, a key mechanism for neonatal disease.
- Research focuses on molecular virulence factors of Gram-positive bacteria, including GBS.
Discussion:
- Investigating GBS cell entry, immune evasion (complement inhibition, phagocytosis resistance), and survival in host environments.
- Utilizing genetic techniques to identify GBS virulence genes and biosynthetic pathways for capsular polysaccharide.
- Exploring host-pathogen interactions in bacterial pneumonia using Staphylococcus aureus and advanced genomic/proteomic methods.
Key Insights:
- Molecular approaches reveal GBS virulence mechanisms and genetic basis for traits like cell invasion.
- Understanding GBS pathogenesis is crucial for combating neonatal infections.
Outlook:
- Characterizing bacterial persistence mechanisms in lung infections.
- Identifying host airway proteins involved in innate immunity against bacterial pneumonia.
Related Concept Videos
Streptococcal Pharyngitis
Streptococcal pharyngitis, commonly known as “strep throat,” is an acute infection of the oropharyngeal tissues caused by the Gram‑positive Group A Streptococcus (Streptococcus pyogenes). Transmission occurs primarily through respiratory droplets expelled during coughing, sneezing, or talking.Mechanisms of Host Entry and Immune EvasionUpon entering the host, S. pyogenes adheres to the mucosal epithelial cells of the pharynx via surface proteins, notably lipoteichoic acid and the antiphagocytic...
Clinical Significance of Antibiotic Resistance
Methicillin-resistant Staphylococcus aureus (MRSA) presents a critical public health threat, arising from its capacity to resist β-lactam antibiotics due to acquisition of the mecA gene within the staphylococcal cassette chromosome mec (SCCmec). This gene encodes penicillin-binding protein 2a (PBP2a), which impairs binding efficacy of methicillin and other β-lactams. MRSA has evolved into distinct clonal lineages impacting humans and animals alike, reinforcing its significance within the One...
Modern Molecular Taxonomy
Advancements in molecular biology have revolutionized the identification and characterization of bacteria, with multiple methods leveraging DNA sequencing for enhanced precision. As sequencing technologies improve and costs decline, these approaches are increasingly used in clinical, environmental, and evolutionary studies.Multilocus Sequence Typing (MLST) examines several housekeeping genes, essential chromosomal genes encoding cellular functions, to distinguish strains. Approximately...
Evolution of Microbial Genome
Microbial genome evolution is a highly dynamic process shaped by continual gene gain and loss across species and strains. This genomic flexibility allows microorganisms to adapt rapidly to environmental pressures and interactions with other organisms. Central to understanding this diversity is the distinction between the core and pan genomes.The core genome comprises the genes shared by all sampled strains of a species, representing essential functions needed for fundamental cellular processes.
Genomic DNA in Prokaryotes
The genome of most prokaryotic organisms consists of double-stranded DNA organized into one circular chromosome in a region of cytoplasm called the nucleoid. The chromosome is tightly wound, or supercoiled, for efficient storage. Prokaryotes also contain other circular pieces of DNA called plasmids. These plasmids are smaller than the chromosome and often carry genes that confer adaptive functions, such as antibiotic resistance.
Genomic Diversity in Bacteria
Although bacterial genomes are much...
Genomic Diversity in Bacteria
Although bacterial genomes are much...
Bacterial Meningitis I: Introduction
Bacterial meningitis is a severe, life-threatening inflammation of the meninges, particularly the pia mater and arachnoid mater, affecting the subarachnoid space, ventricles, and cerebrospinal fluid (CSF). If untreated, it can lead to significant neurological complications or death.Causative AgentsCommon pathogens vary with age and immune status. In adults, major organisms include Streptococcus pneumoniae, Neisseria meningitidis, and Haemophilus influenzae. Streptococcus agalactiae (group B...
