Spontaneous peritonitis attributed to actinomyces species

Area of Science:

• Infectious Diseases
• Microbiology
• Gastroenterology

Background:

• Abdominal actinomycosis is a rare bacterial infection caused by Actinomyces species, typically presenting as localized masses or abscesses.
• Spontaneous peritonitis due to Actinomyces is not previously described in medical literature.
• Intra-abdominal sepsis often involves polymicrobial infections, making diagnosis of rare pathogens challenging.

Observation:

• A case of symptomatic ascitic fluid infection, refractory to standard antimicrobial therapy for intra-abdominal sepsis, was observed.
• The infection was unexpectedly diagnosed through a cytology test of the ascitic fluid.
• The patient's condition was successfully treated with a penicillin regimen.

Findings:

• This case represents the first reported instance of abdominal actinomycosis presenting as spontaneous peritonitis.
• Cytology proved instrumental in diagnosing this rare form of abdominal actinomycosis, which is often overlooked.
• Microbiological diagnosis of spontaneous peritonitis caused by Actinomyces is challenging due to its rarity and atypical presentation.

Implications:

• The findings highlight the importance of considering rare pathogens in refractory intra-abdominal sepsis.
• Cytology of ascitic fluid should be considered in cases of suspected infection unresponsive to initial antimicrobial treatments.
• This case expands the known clinical spectrum of abdominal actinomycosis and emphasizes the need for broader diagnostic considerations.