Abstract: Objective To determine the impact of immigrants on the epidemic of tuberculosis in Beijing.Methods To analysis th e trends of newly registered active and smear-positive pulmonary tuberculosis c ases in census register and immigration in Beijing.Proportion change of tubercul osis cases in immigration in Beijing was clarified.Results Numb er of newly registered active and smear-positive pulmonary tuberculosis cases d ecreased from 2?347 and 764 in 1993 to 2?205 and 703 in 2002 in Beijing reside nts,which only decreased 6% and 8% respectively during the 10 years.On the contr ary,number of newly registered active and smear-positive pulmonary tuberculosis immigrants of Beijing increased from 242 and 90 cases in 1993 to 1?075 and 304 cases in 2002,which increased by 344.2% and 237.8% respectively.If the number o f active and smear-positive cases in Beijing residents added with the cases in immigrants,the number were 3?279 and 1?007 cases in 2002,which corresponded to the levels of number of active and smear-positive cases in 1989 and 1992 respe ctively.Conclusion The trends of increasing tuberculosis cases in immigrants were gradually impact on epidemic of tuberculosis in Beijing,which should be taken effective control measures.

Key words: Pulmonary tuberculosis/epidemic, Beijing