Microbiology of polymicrobial abscesses and implications for therapy

Area of Science:

• Microbiology
• Infectious Diseases
• Clinical Science

Background:

• Abscesses can arise from normal flora entering sterile sites, often involving multiple microbial species.
• Understanding the specific microbial culprits in polymicrobial abscesses is crucial for effective treatment.
• Previous research has focused on the microbiology of these complex infections across various anatomical locations.

Purpose of the Study:

• To review and synthesize findings from our group's studies on the microbiology of polymicrobial abscesses.
• To identify the predominant aerobic and anaerobic bacteria associated with abscesses at different body sites.
• To correlate microbial findings with the anatomical location of the abscess and the origin of the involved flora.

Main Methods:

• Review of previously published studies by the research group.
• Analysis of microbiological data from polymicrobial abscesses across diverse body sites.
• Identification and characterization of aerobic and anaerobic bacterial isolates.

Main Results:

• Staphylococcus aureus and Group A beta-haemolytic streptococci are the most frequent aerobes in skin and soft tissue abscesses.
• Intra-abdominal and lower limb abscesses frequently contain enteric Gram-negative bacilli and Bacteroides fragilis group.
• Oral flora, including Prevotella, Porphyromonas, and Fusobacterium species, are common in head, neck, and finger abscesses.

Conclusions:

• The microbiology of polymicrobial abscesses is site-specific, reflecting the normal flora of adjacent or involved anatomical regions.
• Effective management requires drainage and antimicrobial therapy targeting both aerobic and anaerobic components.
• Recognizing the specific microbial profiles aids in guiding appropriate therapeutic strategies for these complex infections.