Abstract: Objective To know the situation of tuberculosis infection and prevalence among freshman from primary school to college in Baoding from 2009 to 2011, providing scientific basis for the tuberculosis prevention and control. Methods Selecting 10 primary schools, 5 junior high schools, 4 high schools, 4 universities by means of cluster random sampling, which were half of the schools in Baoding, having the freshman done with special exam in tuberculosis, and doing statistical analysis of the results according to the years and grade. Results Freshmen mycobacterial infection rate and total prevalence rates were increasing from 2009 to 2011 (P<0.005). PPD positive rate and strong positive rate of freshman in every grade from primary school to university were increasing gradually (P<0.001). Conclusion Mycobacterial infection and the prevalence of freshman are increasing in recent years. We should pay attention to and strengthen the screening and prevention of tuberculosis among freshmen in university and secondary school.

Key words: freshmen, tuberculosis infection, PPD test