As a precaution, Whole Foods Market has temporarily removed ALL fresh spinach and fresh salad mixes containing spinach from its stores.

ECONOMIST: Those healthy green leaves cause a terrible scare

Safeway stores in northern California sell 50% more fresh herbs, Asian food, fresh pasta, capers and fresh spinach than its stores elsewhere in the country.

ECONOMIST: The healthiest city

Investigators had traced it to consumption of fresh raw spinach sold in bags.

ECONOMIST: Those healthy green leaves cause a terrible scare

FDA, fresh produce from the valley, including spinach, has been the source of nine E. coli outbreaks since 1995.

ECONOMIST: Those healthy green leaves cause a terrible scare