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Related Concept Videos

Rheumatic Heart Disease I: Introduction01:23

Rheumatic Heart Disease I: Introduction

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Rheumatic heart disease or RHD is a chronic condition that results from rheumatic fever, causing permanent damage to the heart valves.Etiology and Risk FactorsIt primarily arises from rheumatic fever, an inflammatory disease that can develop after untreated or inadequately treated group A streptococcal (GAS) pharyngitis. Streptococcus spreads through direct contact with oral or respiratory secretions. While the bacteria are the causative agents, factors like malnutrition, overcrowding, poor...
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Rheumatic heart disease (RHD) management can be divided into two main strategies: prevention and long-term management.Primary PreventionPrimary prevention focuses on timely diagnosis and management of group A streptococcal pharyngitis to prevent acute rheumatic fever. The most widely used antibiotic for treating this condition is intramuscular benzathine penicillin G.Acute Rheumatic Fever TreatmentThe primary treatment goal for a patient diagnosed with acute rheumatic fever is to suppress the...
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Spirochetes, unique bacteria in the phylum Spirochaetes, are gram-negative, motile, tightly coiled, slender, and flexible. They inhabit aquatic sediments and animals, with some causing diseases like syphilis. Spirochetes are classified into eight genera based on habitat, pathogenicity, phylogeny, and characteristics.Their distinctive motility arises from endoflagella, located within the cell’s periplasm. These endoflagella anchor at the cell poles and extend along the cell length, encased...
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Proteobacteria, one of the largest and most diverse bacterial phyla, encompasses a wide range of Gram-negative bacteria distinguished by their outer membrane composed of lipopolysaccharides. These microorganisms exhibit various metabolic capabilities, including phototrophy, chemolithotrophy, and heterotrophy, and thrive in diverse environments from soil to aquatic systems and host-associated niches. The phylum is divided into six classes: Alphaproteobacteria, Betaproteobacteria,...
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Introduction:Endocarditis is the infection of the endocardium, the inner lining of the heart and its valves. When the heart muscle is involved, the condition is termed myocarditis, while an infection of the outer lining is called pericarditis. Infective endocarditis (IE) primarily affects the endocardium, where pathogens adhere to the valves or lining, forming vegetation that can lead to severe complications. Infective endocarditis occurs when microorganisms, usually bacteria from other body...
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A Murine Model of Group B Streptococcus Vaginal Colonization
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Group B Streptococcal Disease.

Karen M Puopolo1,2,3

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The New England Journal of Medicine
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Group B Streptococcus (GBS) causes invasive infections in newborns. Vaccines are in development to prevent GBS disease in all at-risk populations, including infants and adults.

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Area of Science:

  • Bacteriology
  • Immunology
  • Vaccinology

Background:

  • Group B Streptococcus (GBS) is a common colonizer of the gastrointestinal and genitourinary tracts.
  • GBS is the leading bacterial cause of invasive infections in U.S. newborns.
  • Current prevention strategies like intrapartum antibiotic prophylaxis are limited to pregnant individuals and newborns.

Purpose of the Study:

  • To review the current landscape of Group B Streptococcus (GBS) disease.
  • To highlight the unmet need for prevention strategies beyond the neonatal period.
  • To discuss the potential of GBS vaccines for broader population protection.

Main Methods:

  • Literature review of GBS epidemiology and prevention strategies.
  • Analysis of current vaccine development approaches for GBS.
  • Assessment of GBS vaccine candidates targeting capsular polysaccharides conjugated to protein antigens.

Main Results:

  • GBS remains a significant threat to newborns, with limited prevention options for later infancy and nonpregnant adults.
  • Vaccines composed of GBS capsular polysaccharides conjugated to protein carriers are under development.
  • These novel vaccines show promise for preventing GBS disease across diverse at-risk groups.

Conclusions:

  • There is a critical need for GBS prevention strategies applicable to all age groups.
  • Developing GBS vaccines is a promising approach to address this public health challenge.
  • GBS vaccines may offer a comprehensive solution for preventing invasive GBS disease in vulnerable populations.