2.2.1. Sample collection and pathogen determination.
fistula
STERILE, PRESSURE SORE
A sterile cotton swab soaked with physiological saline (0.9%) was used to wipe the pressure sore surface, and secretions in the depths of the wound or fistula were collected using another swab. A sterile test tube was employed for storing the sample for inspection, after which the automatic microbial identification system was used to identify the pathogens.