HTML/FRAMER.CU Virus in wordpress

Hey guys, I need your help.
My AVG 2012 (Total Internet Security Business Edition) tells me that my wordpress blog is infected with HTML/FRAMER.CU virus. Actually, a single post (https://designstutorial.com/2011/10/html-css-beginners-guide.html) is infected.
I installed the Antivirus plugin and scanned, but nothing found.
I manually tried to find out any suspicious code in php files but found nothing.
I then scanned my whole system multiple times for virus but it was clean.
I tried to find out any suspicious HTTP request with firebug but everything was ok.
I then used AVG online scanner and they told me that my website is safe to surf(https://www.avgthreatlabs.com/sitereports/domain/designstutorial.com).

Please reply and suggest me, how to get rid of this virus. I am totally confused. I searched on the google, but most people are saying that we need to remove the current installation and database and then re-install it to get rid of such virus.

Currently, I have 98 posts in my wordpress blog and I dont want to loose data.

Please HELP !!!