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Related Experiment Videos

Surgical infections: a microbiological study.

Santosh Saini1, Naveen Gupta, Aparna

  • 1Department of Microbiology, Pt. B.D. Sharma PGIMS, Rohtak, India.

The Brazilian Journal of Infectious Diseases : an Official Publication of the Brazilian Society of Infectious Diseases
|September 14, 2004
PubMed
Summary
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Surgical infections are often polymicrobial. This study identified common bacteria and their antibiotic sensitivities, finding metronidazole highly effective against anaerobes and highlighting multidrug resistance in Gram-negatives like Pseudomonas aeruginosa.

Area of Science:

  • Microbiology
  • Infectious Diseases
  • Surgical Infections

Background:

  • Surgical infections frequently involve a mix of aerobic and anaerobic bacteria.
  • Understanding the microbial landscape and antibiotic susceptibility is crucial for effective treatment.

Purpose of the Study:

  • To characterize the microbial composition of various surgical infections.
  • To determine the in vitro antibiotic susceptibility patterns of isolated pathogens.
  • To identify effective therapeutic strategies for polymicrobial surgical infections.

Main Methods:

  • Analysis of 117 surgical infection cases, including abscesses, secondary peritonitis, necrotizing fasciitis, and wounds with devitalized tissues.
  • Isolation and identification of aerobic and anaerobic microorganisms.

Related Experiment Videos

  • In vitro antibiotic susceptibility testing for common pathogens.

    • Main Results:

    • Secondary peritonitis showed the highest number of isolates per lesion (2.32).
    • Escherichia coli, Staphylococcus aureus, Klebsiella spp., Pseudomonas aeruginosa, Bacteroides fragilis, and Peptostreptococcus spp. were commonly isolated.
    • Pseudomonas aeruginosa exhibited significant multidrug resistance (52.9%).
    • Anaerobes demonstrated 100% sensitivity to metronidazole and chloramphenicol.
    • Clindamycin and cefuroxime were effective against Staphylococcus aureus.

    Conclusions:

    • Polymicrobial infections are common in surgical settings, particularly secondary peritonitis and necrotizing fasciitis.
    • Tailored antibiotic selection based on susceptibility data is essential, with specific agents recommended for Gram-positive, Gram-negative, and anaerobic bacteria.
    • Non-antimicrobial therapies like hyperbaric oxygen and debridement are important adjuncts to antibiotic treatment.