There isn’t a whole lot of botulism in the U.S. every year, and not all of it is foodborne – infant and wound botulism is more common. Of the bot cases linked to food, canning low acid foods without a pressure canner is a common theme.
Last year over 20 folks in Ohio got sick after home canned potatoes were made into potato salad. Home canned carrots were also linked to a case in Ashe County, North Carolina. 
Home canned stuff, if not preserved correctly, can lead to the devastating illness.
According to AP home canned foods may be linked to two tragic deaths in Moses Lake, Washington.
Health officials say two deaths in Washington state this month appear to be linked to botulism — apparently from home-canned foods.
The Grant County Health District said Friday the cause of the deaths has not been confirmed. The victims were in their 80s and lived together, but health officials say the disease can affect people of any age.