Clostridium innocuum Bacteremia: Case Report and Systematic Review

Area of Science:

• Microbiology
• Human Gut Microbiome Research
• Infectious Diseases

Background:

• Clostridium innocuum is an anaerobic, gram-positive, spore-forming bacterium.
• It is a common commensal organism in the human gut microbiome.
• While generally benign, it can cause infections in specific clinical contexts.

Purpose of the Study:

• To report a case of Clostridium innocuum bacteremia secondary to a diabetic foot ulcer.
• To systematically review previously reported cases of C. innocuum bacteremia.
• To provide a narrative review of C. innocuum's association with various diseases.

Main Methods:

• Case report of a patient with diabetes, end-stage renal disease, and malnutrition.
• Systematic literature review of C. innocuum bacteremia cases.
• Narrative review of C. innocuum's role in other pathologies.

Main Results:

• A case of C. innocuum bacteremia was identified as a complication of a diabetic foot ulcer in a patient with multiple comorbidities.
• The systematic review identified a limited number of prior C. innocuum bacteremia cases.
• C. innocuum has been implicated in conditions including diarrhea, local infections, inflammatory bowel disease, and kidney disease.

Conclusions:

• Clostridium innocuum can be an opportunistic pathogen causing bacteremia, particularly in immunocompromised individuals or those with severe comorbidities.
• Further research is needed to fully understand the pathogenic potential and clinical significance of C. innocuum.
• This review highlights the importance of considering C. innocuum in the differential diagnosis of infections in at-risk patient populations.