Microbiology of infected pilonidal sinuses

Area of Science:

• Microbiology
• Infectious Diseases
• Surgical Infections

Background:

• Pilonidal sinus disease is a common condition often complicated by infection.
• The microbial etiology of infected pilonidal sinuses is not fully elucidated.
• Understanding the bacterial spectrum is crucial for effective treatment strategies.

Purpose of the Study:

• To identify the bacterial isolates from pus aspirates of infected pilonidal sinuses.
• To determine the prevalence of aerobic and anaerobic bacteria in these infections.
• To highlight the polymicrobial nature and predominant bacterial groups involved.

Main Methods:

• Pus samples were collected from 75 patients with infected pilonidal sinuses.
• Bacterial cultures were performed to isolate and identify aerobic and anaerobic bacteria.
• Quantitative analysis of bacterial isolates per specimen was conducted.

Main Results:

• Bacterial growth was observed in all 75 specimens.
• Anaerobic bacteria were predominant, found in 77% of specimens (alone or mixed).
• Key isolates included Bacteroides sp. (81), anaerobic cocci (51), Escherichia coli (15), and Proteus sp. (9).

Conclusions:

• Infected pilonidal sinuses exhibit a polymicrobial infection pattern.
• Anaerobic bacteria, particularly Bacteroides species, are the predominant pathogens.
• Findings emphasize the importance of considering anaerobic coverage in treating pilonidal sinus infections.