Abstract: Objective To analyze the results of tuberculosis(TB) screening for undergraduate freshmen in Grade 1 classes of 2005 and 2006.Capital Medical University and to discuss the preventive measures of TB infection in undergraduates.Methods Chest X-ray(with 500 mA X-ray machine) and Purified Protein Derivative(PPD) tests were carried out among 2410 undergraduate freshmen in Grade 1 classes of 2005 and 2006 of Capital Medical University.Results PPD tests were carried out among 1504 undergraduate freshmen in Grade 1 class of 2005 with 20 positive cases accounting for 1.33% and among 906 undergraduate freshmen in Grade 1 class of 2006 with 11 positive cases accounting for 1.21%.Chest X-ray for TB was carried out among 1504 undergraduate freshmen in Grade 1 class of 2005 with 6 cases infected with TB accounting for 0.399% and among 906 undergraduate freshmen in Grade 1 class of 2006 with 3 cases infected accounting for 0.331%.Conclusion The prevalence rates of TB among undergraduate freshmen are not lower than that of the national basic TB control index.PPD test is an effective screening method.College students are highly vulnerable to TB.Measures should be taken to improve the resistance to TB and to prevent and reduce the infection of TB,by strengthening health education,building up constitution and developing good personal hygienic habits.Regular physical checkup should be carried out among college students on campus in order to detect early TB cases and take active preventive and control measures.

Key words: undergraduates, tuberculin test of TB, screening