Objective:To investigate the distribution of Mycobacterium in water source in Beijing,and to compare phenotype method and PCR-based technique in identification of Mycobacteria.

• 目的:研究北京水源中分枝杆菌的分布,应用表型鉴定方法和分子生物学方法进行分枝杆菌鉴定,并比较两种方法的准确性和优缺点。