[The cholera syndrome - pathogenesis and pathogens (author's transl)]

Area of Science:

• Microbiology
• Pathogenesis
• Gastroenterology

Background:

• Classical cholera and certain enteritides share underlying pathomechanisms.
• Non-agglutinating (NAG) vibrios and specific E. coli strains are implicated in these enteritides.
• Understanding shared pathogenic factors is crucial for accurate diagnosis and treatment.

Purpose of the Study:

• To elucidate the common pathomechanisms between cholera and enteritides caused by NAG vibrios and E. coli.
• To highlight the role of specific virulence factors in these gastrointestinal infections.
• To re-evaluate the pathogenic potential of NAG vibrios.

Main Methods:

• Analysis of enterotoxin activity and its effect on intestinal cells.
• Investigation of the role of neuraminidase in potentiating enterotoxin effects.
• Assessment of endotoxin as a contributing pathogenetic factor.
• Microbiological differentiation of pathogens.

Main Results:

• A heat-labile enterotoxin activates adenyl cyclase, leading to ion and water secretion in the small intestine.
• Neuraminidase enhances pathogenicity by increasing enterotoxin receptor availability.
• Endotoxin acts as an additional pathogenetic factor.
• Despite microbiological differences, shared factors create a fluid transition between disease states.

Conclusions:

• The shared pathomechanisms, including heat-labile enterotoxin and endotoxin, blur the lines between cholera, NAG vibrio enteritis, and E. coli enteritis.
• NAG vibrios possess significant pathogenic potential and should not be dismissed as merely harmless water vibrios.
• A comprehensive understanding of these shared factors is essential for clinical and epidemiological perspectives.