CUPERTINO, Calif. –  Symantec, which makes anti-malware software, has identified the 100 “Dirtiest Web Sites of Summer 2009," the 100 sites with the most threats detected by site ratings service, Norton Safe Web, as of August.

Forty-eight of these sites feature adult content. But the vendor said the list ranged in subject matter from sites dedicated to deer hunting, catering, figure skating, legal services, to buying electronics. Visiting sites, even without downloading or clicking on any element, can expose a user’s computer to infection or data theft. Symantec said  75 percent of these sites have distributed malware for more than six months.