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Bacteriology of human bite wound infections

C V Merriam1, H T Fernandez, D M Citron

  • 1R. M. Alden Research Laboratory, 2001 Santa Monica Blvd., Santa Monica, CA 90404, USA. vreni-rmarl@juno.com

Anaerobe
|August 5, 2006
PubMed

Insights

Human bite wound infections show distinct bacterial profiles compared to animal bites. Prevotella spp. and Streptococcus milleri group bacteria are key pathogens in human bites, differing significantly from animal bite flora.

Area of Science:

  • Microbiology
  • Infectious Diseases
  • Wound Care

Background:

  • Bite wound infections pose a significant clinical challenge.
  • Understanding the specific microbial etiology is crucial for effective treatment.
  • Previous studies have characterized animal bite wound bacteriology, but human bite data is less defined.

Purpose of the Study:

  • To delineate the specific bacterial pathogens involved in infected human soft-tissue bite wounds.
  • To compare the bacteriology of human bite wounds with that of animal bite wounds.

Main Methods:

  • Specimens were collected from 57 patients with infected human bite wounds across 12 emergency room locations.
  • Bacterial cultures were performed to isolate and identify aerobic and anaerobic organisms.
  • Quantitative analysis of isolated organisms was conducted.

Main Results:

  • A total of 380 organisms were isolated, averaging 6.6 per specimen.
  • Prevotella spp. were the most common anaerobes (34%).
  • Streptococci (44%) were the predominant aerobes, with the Streptococcus milleri group (particularly S. anginosus) being most frequent.

Conclusions:

  • The bacterial pathogens identified in human bite wound infections are considerably different from those found in animal bite infections.
  • This distinct microbiological profile necessitates tailored therapeutic approaches for human bite wounds.

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