Which two states were involved in the initial identification of E.coli 0157:H7 as a pathogen?

The initial identification of E. coli O157:H7 as a significant foodborne pathogen can be traced back to an outbreak that occurred in the early 1980s. This outbreak specifically involved the state of Washington, where a cluster of cases was reported, leading to a detailed investigation. The researchers identified the strain E. coli O157:H7 in association with undercooked hamburger meat served at a fast-food restaurant.

Additionally, the state of Michigan was involved in the subsequent findings related to this pathogen as cases spread wider. The collaborative efforts of health departments in these states were pivotal in elucidating the connection between the contaminated food source and the associated illness.

By focusing on the outbreak and the investigation that took place in Washington and Michigan, we see why this pairing is particularly significant in the history of food safety and public health related to E. coli.