The world's most successful bug hits dolphins - life - 02 June 2008 - New Scientist

http://www.newscientist.com/channel/life/dn14037-the-worlds-most-successful-bug-hits-dolphins.html?feedId=online-news_rss20
--- How does a parasite found in kitty litter get into whales and
dolphins? By hitching a ride down the sewage pipe and into anchovy
guts, say researchers.