Abstract: Objective To analyze the clinical features of pulmonary tuberculosis in infant. Methods Retrospective analysis of the clinical features of 67 cases with pulmonary tuberculosis in infant,including BCG vaccine,contact history with tuberculosis,clinical manifestation,laboratory examination,chest imaging and PPD test was conducted. Results Twenty cases(29.9%) were found with no BCG vaccine. Thirty-one cases(46.3%) had contact history with tuberculosis and 26 cases(38.8%) were temporary resident children.Fifty-one cases(76.1%) were found with fever,59(88.1%) with respiratory symptom,and 15(22.4%) with nerve system symptom.Fourteen cases(20.9%) were found with negative PPD test,50(74.6%) with elevatory CRP,45(67.1%) with elevatory ESR,45(67.2%) with leucocytosis.Chest x-ray was performed in 67 cases,while 16 cases(23.9%) showed increased bronchovascular shadows.CT examination was performed in 58 cases and 2 cases were normal.Finally,40 cases(59.7%) were diagnosed with primary pulmonary tuberculosis,14(20.9%) with hematogenous pulmonary tuberculosis,5(7.5%) with secondary pulmonary tuberculosis and 8(11.9%) with tuberculous pleurisy. Conclusion Pulmonary tuberculosis in infant has a certain clinical characteristics and clinical physician should attach weight to the early diagnosis.Prevention and cure with pulmonary tuberculosis in recurrent population should be strengthened and BCG vaccination in temporary resident children should be extended.

Key words: pulmonary tuberculosis/diagnosis, infant