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Aeromonas species isolated from cases of acute gastroenteritis

S Vasaikar1, K Saraswathi, A De

  • 1Dept. of Microbiology, Seth GS Medical College and KEM Hospital Parel, Mumbai - 400 012, India.

Indian Journal of Medical Microbiology
|July 28, 2007
PubMed

Insights

This study identified Aeromonas strains in acute gastroenteritis patients, finding Aeromonas hydrophila predominant. Most isolates were sensitive to gentamicin and nalidixic acid but resistant to ampicillin.

Area of Science:

  • Microbiology
  • Infectious Diseases
  • Antimicrobial Resistance

Background:

  • Acute gastroenteritis is a significant global health concern.
  • Aeromonas species are recognized as emerging bacterial pathogens causing diarrheal diseases.

Purpose of the Study:

  • To investigate the prevalence and antimicrobial susceptibility patterns of Aeromonas strains isolated from patients with acute gastroenteritis.

Main Methods:

  • Bacterial isolation and identification from patient samples.
  • Antimicrobial susceptibility testing using standard antibiotic discs.
  • Determination of Minimum Inhibitory Concentration (MIC) for resistant strains.

Main Results:

  • A total of 67 Aeromonas strains were isolated from 1485 patients.
  • Aeromonas hydrophila (64.2%) was the most common species, followed by Aeromonas sobria (28.4%) and Aeromonas caviae (7.4%).
  • The majority of isolates showed sensitivity to gentamicin and nalidixic acid, but resistance to ampicillin was prevalent, with MIC values ranging from 80-1280 µg/mL.

Conclusions:

  • Aeromonas species, particularly A. hydrophila, are significant causative agents of acute gastroenteritis.
  • The observed resistance to ampicillin highlights the need for careful antibiotic selection in treating Aeromonas infections.
  • Gentamicin and nalidixic acid remain effective therapeutic options against these isolates.

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