http://reply.papertrans.cn/2/125/12488/12488-31.png
http://reply.papertrans.cn/2/125/12488/12488-32.png
http://reply.papertrans.cn/2/125/12488/12488-33.png
http://reply.papertrans.cn/2/125/12488/12488-34.png
http://reply.papertrans.cn/2/125/12488/12488-35.png
Submitted on: 13 October 2006.
Revised on: 22 December 2006.
Accepted on: 09 February 2007.
___________________INFECTION AND IMMUNITY---AMER SOC MICROBIOLOGY