Among the 3992 strains of Gram negative Bacillus, the most common organisms were E. coli 980 (24.6%), P.aeruginosa 774 (19.4%), K. pneumoniae 408 (10.2%).

• 受检的 3992株革兰阴性杆菌中 ；大肠埃希菌980株 ；占 2 4 .；6%25；铜绿假单胞菌 774株；占 19