Their process was relatively simple. They looked at information records focused on positive diagnoses of MRSA. They then looked for a particular strain known to be associated with livestock. They looked at over 10,000 screening records and whittled the number down based on the diagnosis, the identification of the bacterium, and the strain. They came up with a more manageable number, 373, and then started to look for signs of animal association. The hope was animal-based strains would be in the minority, but they were wrong. Of those 373 cases, 292 of them – 78 percent – were associated with livestock.