1998年下半年 ,对张家口市某医院口腔科器械、医护人员手表面及室内空气细菌与乙型肝炎表面抗原 (ＨＢｓＡｇ)污染进行了调查。对室内空气用平板沉降 5ｍｉｎ采样后培养。对台、椅、器械及医护人员手 ,用浸有 0 0 3ｍｏｌ/Ｌ磷酸盐缓冲液的棉拭涂抹采样。取采样后棉拭洗脱液 , In the second half of 1998, investigations were conducted on the surface of dentistry equipment and the surface airborne bacteria and hepatitis B surface antigen (HBsAg) contamination in a hospital in Zhangjiakou City. The indoor air was plated after 5 minutes of sampling and cultured. For stools, chairs, instruments, and medical personnel’s hands, smear with a cotton swab moistened with 0 3 3mol/L phosphate buffer. After sampling, wipe the eluent,