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Microbiology of human and animal bite wounds in children

I Brook

    The Pediatric Infectious Disease Journal
    |January 1, 1987
    PubMed

    Insights

    Bite wounds in children commonly contain both aerobic and anaerobic bacteria. Human bites had more bacteria than animal bites, with Staphylococcus aureus being a frequent cause.

    Area of Science:

    • Microbiology
    • Infectious Diseases
    • Pediatrics

    Background:

    • Bite wounds are a significant cause of infection in children.
    • Understanding the microbial flora of bite wounds is crucial for effective treatment.

    Purpose of the Study:

    • To characterize the aerobic and anaerobic bacterial isolates from pediatric bite wounds.
    • To compare the microbial composition of animal versus human bites.

    Main Methods:

    • Aspirates from 39 children's bite wounds (21 animal, 18 human) were cultured.
    • Aerobic and anaerobic bacteria were identified and quantified.
    • Beta-lactamase production was assessed.

    Main Results:

    • Mixed aerobic and anaerobic bacteria were found in 74% of wounds.
    • Human bites yielded more isolates (5.4/specimen) than animal bites (2.8/specimen).
    • Staphylococcus aureus, anaerobic cocci, and Bacteroides spp. were common in both; Group A streptococci were unique to human bites.

    Conclusions:

    • Pediatric bite wounds are polymicrobial, involving both aerobic and anaerobic bacteria.
    • Human bites present a more complex microbial profile than animal bites.
    • The presence of beta-lactamase-producing organisms highlights the need for careful antibiotic selection.

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