OBJECTIVES

This study aimed to identify the bacterial composition in the pancreatic fluid of severe and critical acute pancreatitis (SAP and CAP) patients.

METHODS

A total of 78 pancreatic fluid samples were collected from 56 SAP and CAP patients and analyze using aerobic culture and gene next-generation sequencing. The clinical data of the patients were obtained from the electronic medical records.

RESULTS

Among the total 78 samples, gene NGS identified a total of 660 bacterial taxa, belonging to 216 species in 123 genera. The dominant aerobic bacteria included , , and , while the dominant anaerobic bacteria included , , and . As compared to aerobic culturing, 95.96% (95/99) of the aerobic cultured bacteria were detected using the gene NGS.

CONCLUSION

The pancreatic infections in SAP and CAP patients might originate not only from the gut but also from the oral cavity and airways as well as related environments. Dynamic analysis of bacterial profile and abundance showed that some bacteria with low abundance might become the main pathogenic bacteria. There were no significant differences in the bacterial diversity between SAP and CAP.