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Diphtheria

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Diphtheria is an acute, toxin-mediated infectious disease that primarily affects the upper respiratory tract. It is caused by Corynebacterium diphtheriae, a Gram-positive, pleomorphic rod that lacks spore-forming capability and exhibits a characteristic club-shaped morphology under microscopic examination. While C. diphtheriae can asymptomatically colonize mucosal surfaces, clinical disease manifests only when the bacterial strain is lysogenized by a specific β-corynephage. This phage...
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Diarrhea-predominant irritable bowel syndrome (IBS-D) is a subtype of IBS characterized primarily by frequent, loose, or watery stools, abdominal pain, and abdominal discomfort. Therapeutic approaches to managing IBS-D include dietary changes, stress management techniques, and pharmaceutical interventions.
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Fecal Microbiota Transplantation via Colonoscopy for Recurrent C. difficile Infection
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Fecal Microbiota Transplantation via Colonoscopy for Recurrent C. difficile Infection

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Clostridium difficile infection.

Wiep Klaas Smits1, Dena Lyras2, D Borden Lacy3

  • 1Section Experimental Bacteriology, Department of Medical Microbiology, Leiden University Medical Center, PO Box 9600, 2300 RC Leiden, The Netherlands.

Nature Reviews. Disease Primers
|May 10, 2016
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Summary
This summary is machine-generated.

Clostridium difficile infection (CDI) causes life-threatening diarrhea, particularly in the elderly. Understanding CDI pathogenesis and developing new therapies like fecal microbiota transplants are crucial for managing this health-care-associated infection.

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Area of Science:

  • Microbiology
  • Gastroenterology
  • Infectious Diseases

Background:

  • Clostridium difficile is a Gram-positive bacterium causing potentially life-threatening colon infections, especially in the elderly and those with gut dysbiosis.
  • It is the leading cause of health-care-associated infective diarrhea, influenced by antimicrobials, host immunity, and gut microbiota.
  • Key mediators of inflammation include toxins A (TcdA), B (TcdB), and binary toxin (CDT), which trigger host responses leading to diarrhea, inflammation, and tissue necrosis.

Purpose of the Study:

  • To understand the pathogenesis of Clostridium difficile infection (CDI).
  • To explore factors contributing to the epidemic spread of certain C. difficile strains.
  • To highlight the importance of toxin detection for diagnosis, epidemiology, and management.

Main Methods:

  • The abstract does not specify methods but discusses the influence of antimicrobial agents, host immune system, and gut microbiota on C. difficile.
  • It mentions the role of toxins (TcdA, TcdB, CDT) in mediating inflammation and symptoms.
  • Diagnostic approaches like toxin detection are discussed in relation to epidemiological studies.

Main Results:

  • C. difficile infection leads to diarrhea, inflammation, and tissue necrosis.
  • Recurrent infections are common and can be debilitating.
  • Toxin detection is vital for accurate diagnosis and epidemiological studies.

Conclusions:

  • Effective management and prevention strategies for C. difficile infection rely on accurate diagnosis through toxin detection.
  • While antimicrobial agents are common treatments, fecal microbiota transplants show promise for recurrent infections.
  • Future biotherapies are expected to involve defined combinations of gut microbiota.