The majority was H.influenzae(18.18%),Pseudomanas(13.64%) and Acinetobacter(8.33%) in Gram negative and Streptococcus pneumoniae( 15.91%), Streptococcus viridans( 11.3 6%), Staphylococcus edidermidis(9.09%) in Gram positive.

• G~-菌中以流感嗜血杆菌(18.；18%25)、假单胞菌属(13