Submitted on: 22 May 1999.
Revised on: 10 June 1999.
Accepted on: 07 July 1999.
Microbiology Spectrum
http://reply.papertrans.cn/3/220/21916/21916-32.png
Submitted on: 19 May 2003.
Revised on: 22 June 2003.
Accepted on: 01 July 2003.
Microbiology Spectrum
http://reply.papertrans.cn/3/220/21916/21916-34.png
http://reply.papertrans.cn/3/220/21916/21916-35.png
http://reply.papertrans.cn/3/220/21916/21916-36.png