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Aeromonas spp. and their association with human diarrheal disease

L P Deodhar1, K Saraswathi, A Varudkar

  • 1Department of Microbiology, Lokmanya Tilak Municipal Medical College and General Hospital, Sion, Bombay, India.

Journal of Clinical Microbiology
|May 1, 1991
PubMed

Insights

Aeromonas species, particularly Aeromonas hydrophila, were identified as a cause of acute gastroenteritis in young children. All isolated strains produced enterotoxin and hemolysin, suggesting their pathogenic potential.

Area of Science:

  • Microbiology
  • Infectious Diseases
  • Gastroenterology

Background:

  • Aeromonas species are increasingly recognized in waterborne illnesses.
  • Their role in acute gastroenteritis, especially in pediatric populations, requires further investigation.

Purpose of the Study:

  • To determine the prevalence and pathogenic potential of Aeromonas species in patients with acute gastroenteritis.
  • To characterize the toxin production of isolated Aeromonas strains.

Main Methods:

  • Prospective study of patients with acute gastroenteritis from January 1988 to December 1989.
  • Isolation and identification of bacterial pathogens from stool samples.
  • Detection of enterotoxin and hemolysin production in Aeromonas isolates using rabbit models.

Main Results:

  • Aeromonas species were isolated from 1.8% of 2,480 patients with acute gastroenteritis.
  • Aeromonas hydrophila was the predominant species (77.8%), followed by Aeromonas sobria (15.5%) and Aeromonas caviae (6.7%).
  • All isolated Aeromonas strains tested positive for enterotoxin and hemolysin production.

Conclusions:

  • Aeromonas species are a significant cause of acute gastroenteritis in children under 5 years old.
  • The enterotoxigenic and hemolysin-producing capabilities of these strains support their role as enteric pathogens.

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