The most commonly diagnosed cases stem from salmonella (7,800 cases and 33 deaths), which comes from the feces of chickens and other animals and contaminates water and produce. The deadliest pathogen was listeria, with 13 of 121 cases resulting in death. In 2011, an outbreak of listeriosis, caused by cantaloupe from Jensen Farms in Holly, Colorado, led to the deaths of 30 people, making it the worst food-borne outbreak in more than 25 years.
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