Bacteria Co-colonizing with Clostridioides Difficile in Two Asymptomatic Patients

Area of Science:

• Microbiology
• Gastroenterology
• Infectious Diseases

Background:

• Clostridium difficile infection (CDI) is a major cause of hospital-acquired diarrhea.
• Asymptomatic C. difficile colonization may be influenced by co-colonizing bacterial taxa.
• Limited data exists on the specific bacterial compositions in asymptomatic C. difficile carriers.

Purpose of the Study:

• To investigate the fecal microbiota composition in asymptomatic C. difficile carriers.
• To identify key bacterial taxa associated with asymptomatic colonization.
• To explore potential co-infections in asymptomatic carriers.

Main Methods:

• Culture-based methods were employed to analyze stool microbiota.
• Phylogenetic relationships were determined using 16S ribosomal gene sequencing.
• Molecular Evolutionary Genetics Analysis (MEGA) version 7 was utilized.

Main Results:

• Escherichia (33.3%), Clostridium (24.3%), and Enterococcus (11.7%) were abundant in asymptomatic patients.
• The dominant phyla identified were Firmicutes (51.3%) and Proteobacteria (44.1%).
• Co-colonization with human pathogens including Klebsiella pneumoniae and Fusobacterium nucleatum was observed alongside C. difficile.

Conclusions:

• The study characterized the fecal microbiota of two asymptomatic C. difficile carriers in Guizhou, China.
• These findings suggest that co-infections with human pathogens might be prevalent during the progression of CDI.
• Understanding asymptomatic microbiota composition is crucial for predicting CDI development.