detecting worms in websites

I want to ask a question :-

Are there network worms which leave their signatures in the source of the web page?

In other words,
Can we detect a worm by analysing the web-page (by trying to find the worm signature in the source of the webpage)?

In other words,
Can an intrusion prevention system identify worms by analysing the web pages?

In a plain words,
If you open an infected webpage (by notepad), can you find a worm signature in it?

I hobe to get an answer.

Any help is greatly appreciated.