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Related Concept Videos

Development of the Oral Microbiota01:28

Development of the Oral Microbiota

The establishment of the oral microbiome begins before birth, challenging the long-held belief that the fetal oral cavity is sterile. The presence of oral microbes such as Streptococcus and Fusobacterium in amniotic fluid suggests that microbial exposure may occur in utero, potentially through translocation from the maternal oral or gastrointestinal tract. This early colonization primes the neonatal immune system and sets the stage for subsequent microbial succession. Maternal health,...
Bacterial Meningitis I: Introduction01:22

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...
Streptococcal Pharyngitis01:27

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...
Sexually Transmitted Infections01:26

Sexually Transmitted Infections

Sexually transmitted infections (STIs) are diseases transmitted primarily through unsafe sexual interactions. Bacteria, viruses, or parasites cause them and can result in severe health complications if untreated.ChlamydiaThe bacterium Chlamydia trachomatis is responsible for the disease Chlamydia, the most common STI in the United States. This peculiar pathogen requires human cells to reproduce, residing intracellularly. The initial infection often goes unnoticed because it typically does not...
Bacterial Meningitis01:24

Bacterial Meningitis

Bacterial meningitis is a severe infectious disease involving inflammation of the meninges, the protective membranes surrounding the brain and spinal cord. It occurs when pathogenic bacteria cross the blood–brain barrier and enter the cerebrospinal fluid. Common causative organisms include Neisseria meningitidis, Streptococcus pneumoniae, Haemophilus influenzae type b, Listeria monocytogenes, and Escherichia coli K1. The exact route of entry varies by pathogen and host condition.Routes of Entry...
Transcytosis of IgG01:15

Transcytosis of IgG

Transcytosis is the process in which molecules are internalized by endocytosis, transported across the cell, and released through exocytosis from the opposite end of the cell. Molecules such as insulin, immunoglobulins, and certain nutrients are transferred through the recycling endosomes by recycling and transcytosis.
IgG molecules from a mother undergo transcytosis starting around 13 weeks of gestation. The amount of IgG transferred and entering the fetal blood circulation increases with...

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Related Experiment Video

Updated: Jul 12, 2026

A Murine Model of Group B Streptococcus Vaginal Colonization
10:19

A Murine Model of Group B Streptococcus Vaginal Colonization

Published on: November 16, 2016

Group B streptococcus infection in pregnancy.

Hung N Winn1

  • 1Department of Obstetrics, Gynecology and Women's Health, University of Missouri, Columbia School of Medicine, 3401 Berrywood, Suite 203, Columbia, MO 65201, USA. winnh@health.missouri.edu

Clinics in Perinatology
|September 4, 2007
PubMed
Summary

Group B Streptococcus (GBS) causes severe maternal and neonatal infections. Understanding GBS is crucial for preventing serious complications like sepsis and endometritis.

Area of Science:

  • Microbiology
  • Infectious Diseases
  • Obstetrics

Background:

  • Group B Streptococcus (GBS), or Streptococcus agalactiae, is a significant pathogen.
  • GBS is a primary cause of severe maternal and neonatal infections and sepsis.

Purpose of the Study:

  • To highlight the role of GBS in maternal and neonatal infections.
  • To detail the types of maternal infections associated with GBS.

Main Methods:

  • Literature review of GBS epidemiology and clinical manifestations.
  • Analysis of GBS-related maternal and neonatal infection case studies.

Main Results:

  • GBS is identified as a major etiological agent in severe maternal and neonatal sepsis.
  • Common maternal infections linked to GBS include acute chorioamnionitis, endometritis, and urinary tract infections.

Related Experiment Videos

Last Updated: Jul 12, 2026

A Murine Model of Group B Streptococcus Vaginal Colonization
10:19

A Murine Model of Group B Streptococcus Vaginal Colonization

Published on: November 16, 2016

Conclusions:

  • GBS poses a substantial risk for severe infections in mothers and newborns.
  • Prompt recognition and management of GBS infections are essential in obstetric care.