Objective    To understand the cognition status about preventing from blood pathogens in Chongqing nursing staff of occupational exposure to blood and to provide the evidence necessary to the education of occupational prevention.     Methods    Totally 1 270 nurses in 20 hospitals in Chongqing were investigated by self-designed Questionnaires. The contents included understanding

acquisition approaches

the knowledge that should be known etc..      Results    The knowledge of occupational exposure was inadequate. The proper answers averaged 54.59% in questionaire and there was significant difference in the cognition about occupational blood exposure among those of different education background

professional title

nursing age and types of employment (P0.05).     Conclusion    This survey suggests that the courses of occupational prevention should be carried out in medical colleges. Those nurses with low education background

inferior professional title and the staff with less understanding of occupational exposure should be further trained.