关键词: <, p>, 实验动物, 屏障设施, 静态, 动态, 空气落下菌<, /p>

Abstract: Abstract: Objective To understand the situation of the air borne bacteria in quiescent state and dynamic state in negative pressure barrier facility and analyze parameters changing． Method The air borne bacteria in quiescent state and dynamic state were tested according to the national standards GB 14925—2010 for laboratory animal environment and facility ． Ｒesult The air borne bacteria were 100% above standard for breeding area in barrier environment; The air borne bacteria were 92. 86% for the other area of pollution corridor and the air borne bacteria were 91. 67% for the second dressing room in barrier environment． Conclusion Although there was no national standard of the air borne bacteria in dynamic state in barrier environment，It is necessary for detecting the air borne bacteria，The accumulation of testing data of four years which will provide reliable evidences for the standardization of barrier environment．

Key words: <p>laboratory animal, barrier facility, quiescent state, dynamic state, air borne bacteria</p>