This months MMWR contains a report on an outbreak of shiga-toxin producing E. coli O157 at a petting zoo in Florida in 2007. 
Unfortunately, this is nothing new. The "editorial note" states that between 1991-2005, the CDC received reports of 32 outbreaks of E. coli O157 that "were associated with animals in public settings." Beginning in
Setton International Foods, Inc., has just
Press accounts, as well as those from the CDC, addressing the number of sick people in the ongoing Salmonella sprouts outbreak are a little misleading if you don’t know what is actually being said. The reality of these outbreaks (whether E. coli O157, Salmonella, or anything else) is that the number of people who are actually ill, as opposed to the number who have a stool sample that tests positive, is much bigger than the reports would indicate.