26 cases (76, 47%) were caused by anaerobic bacteria (Pseudomonas aeruginosa, Serratia spp, Acinetobacter spp, Enterobacter spp).
26 trường hợp (76,47%) do vi trùng kỵ khí gây nên (Pseudomonas aeruginosa, Serratia spp., Acinetobacter spp.