Diarrheagenic pathogens in polymicrobial infections

Area of Science:

• Infectious Diseases
• Gastroenterology
• Microbiology

Background:

• Diarrhea remains a significant cause of morbidity worldwide.
• Identifying causative pathogens is crucial for effective treatment and control.
• Polymicrobial infections are common but their dynamics are not fully understood.

Purpose of the Study:

• To investigate the prevalence of multiple gastrointestinal pathogens in diarrhea patients.
• To analyze the associations between specific pathogens, particularly Vibrio cholerae O1 and rotavirus, and other co-infecting agents.
• To determine if these associations are influenced by patient age or season.

Main Methods:

• Systematic active surveillance of 2,748 patients admitted with diarrhea.
• Testing fecal samples for 26 known gastrointestinal pathogens.
• Statistical analysis to identify non-random associations between pathogens, stratified by age and season.

Main Results:

• Approximately 29% of patients had samples with multiple pathogens.
• Polymicrobial infections frequently involved Vibrio cholerae O1 and rotavirus.
• Significant non-random associations (both increased and decreased detection rates) were observed between V. cholerae O1/rotavirus and other pathogens, persisting after stratification.

Conclusions:

• Multiple gastrointestinal pathogen infections are common in diarrhea patients in Kolkata, India.
• The co-occurrence of Vibrio cholerae O1 and rotavirus with other pathogens is non-random.
• The underlying causes and clinical implications of these complex pathogen interactions require further investigation.