Following a mysterious outbreak of salmonella in 2007 linked to pot pies from ConAgra Foods, corporations have moved to place the responsibility for "food safety" on the consumer through warnings and instructions on how to prepare processed food items. The New York Times reports, "Increasingly, the corporations that supply Americans with processed foods are unable to guarantee the safety of their ingredients. In this case, ConAgra could not pinpoint which of the more than 25 ingredients in its pies was carrying salmonella. Other companies do not even know who is supplying their ingredients, let alone if those suppliers are screening the items for microbes and other potential dangers, interviews and documents show." Consumers are directed to cook foods to temperatures hot enough to kill off lingering microbes.