Hi tinav,
To my knowledge, the deaths related to romaine lettuce grown in the Yuma (Arizona) region. I don't think experts have as yet determined the underlying cause.
Again, to my knowledge, this is growing region specific and mostly not limited to a specific brand. Also understand that most of the deaths were determined to have resulted from consumption of the romaine, but "The
CDC said that some of the affected people had not eaten lettuce, but had contact with others who had fallen ill."
See also "
FDA Investigating Multistate Outbreak of E. coli ...." 1 June 2018,
FDA.gov. Article includes statement (emphasis added), 'The FDA is investigating a multistate outbreak of E. coli O157:H7 illnesses likely linked to romaine lettuce sourced from the winter growing areas in and around the Yuma growing region.
Product is no longer being harvested or distributed from this area and is no longer available in stores or restaurants, due to its 21-day shelf life."