In which,the only anerobic positive were 32.3%(10/31), aerobic positive were 3.2%(1/31),both positive were 64.5%(20/31).

• 3%25。21株需氧菌中,大肠杆菌占71%25,肺炎克雷伯菌、产气肠杆菌、阴沟肠杆菌各占9。5%25。