The Centers for Disease Control and Prevention is reporting the E. coli outbreak linked to romaine lettuce from coastal counties in California appears to be over.

Canada’s Fruit and Vegetable Dispute Resolution Corp. has received numerous calls from companies importing U.S. romaine regarding who’s responsible for losses in the E. coli outbreak in both countries.

The FDA has named Adam Bros. Farm in Santa Barbara County as one source of the E. coli outbreak linked to romaine — but it cautions that the finding does not explain all the illnesses in the outbreak.

All romaine products — and salad blends not containing romaine — exported to Canada face new standards in the wake of new labeling in the U.S.

Romaine is slowly making its way back to store shelves following the Food and Drug Administration’s six-day “purge” of all products containing the leafy green.

I visited 12 grocery stores in the Kansas City area the evening that the Centers for Disease Control and Prevention linked another E. coli outbreak to romaine, and the Nov. 20 trip was far more revealing than I expected.

The Canadian Food Inspection Agency has added to the number of cases of E. coli linked to romaine lettuce in that country.

In a trio of tweets Nov. 23, FDA Commissioner Scott Gottlieb referred to plans to allow romaine to return to the market, and a possible new labeling standard to aid in tracing products in future outbreaks.

In a Thanksgiving Day tweet, Food and Drug Administration Commissioner Scott Gottlieb said the agency believes the source of the E. coli-tainted romaine responsible for a nationwide ban on the lettuce is California.

National health authorities are telling consumers, retailers and restaurants to avoid romaine lettuce in yet another E. coli outbreak with cases in 11 states and Canada.