*This project was supported by grants from the National Natural Science Foundation of China (Grant No. 30901352), Innovative Research Team in University of Hunan Province (Number: [2008] 51), Hunan Provincial Innovation Foundation for Postgraduate and Hunan Provincial Training and Innovation Base for Post-graduate. #Correspondence should be addressed to WU Yi Mou. Tel: 86-734-8282907. Fax: 86-734-8282907. E-mail: yimouwu@sina.com Biographical note of the first author: ZHOU Zhou, female, born in 1980, Ph. D candidate, majoring in pathogenesis and diagnosis of Chlamydophila pneumoniae. Received: August 21, 2011; Accepted: May 31, 2012