What are the diseases caused by fast food?

Most fast-food restaurants receive their bulk raw food from giant plants that service not only all of that chain's restaurants, but other chains as well. If infection occurs in one of those giant plants, it can become widespread very quickly. This event happens very rarely. These super-processors are financially and ethically very vulnerable to problems of this sort, so they know it's in their best interest to perform a ton of quality assurance all down the line. Infections, then, are VERY rare. Usually, when something does infect, it's a bacterium that's endemic -- very, very common. A few of these are: * E. coli * Salmonella sp. * Brucella sp. * Shigella sp. And many others. This kind of thing makes news, so when it happens, we all get to hear about it. This, however, is not proof positive that fast-food restaurants or their suppliers are casual about their clients' health -- they most definitely aren't.