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April 27, 2018

UA Cooperative Extension Experts Available for Comment on E. coli

TUCSON, Ariz. — Two University of Arizona Cooperative Extension scientists are available for comment on the recent report of E. coli bacteria found in romaine lettuce. 

As a safety precaution, the Centers for Disease Control is advising consumers not to eat romaine lettuce from the Yuma, Arizona, growing region. This includes whole heads and hearts of romaine, chopped romaine, baby romaine, organic romaine, and salads and salad mixes containing romaine lettuce.

The CDC also recommends restaurants and retailers should not serve or sell romaine lettuce from the Yuma, Arizona, growing region.

Cooperative Extension Associate Specialist Channah Rock and Assistant Specialist Paula Rivadeneira work in the areas of food safety, water quality and microbiology. They recently released a new publication "E. coli, Water Quality, Food Safety and Human Health," which is available for download at

Rock and Rivadeneira are available to talk about the stringent food safety regulations followed in agricultural fields, as well as extra food safety precautions for consumers.


Extension contact:
Channah Rock, Ph.D.
Cooperative Extension Associate Specialist, Water Quality
UA Department of Soil, Water and Environmental Science
480-628-9794 (cell)
520-374-6258 (office)

Extension contact:
Paula Rivadeneira, Ph.D.
Cooperative Extension Assistant Specialist, Food Safety and Wildlife
UA Department of Soil, Water and Environmental Science
928-919-2611 (cell)
928-782-5893 (office)

Media contact:
Faith Schwartz
UA Arizona Cooperative Extension

Established in 1885, the University of Arizona, the state's super land-grant university with two medical schools, produces graduates who are real-world ready through its 100% Engagement initiative. Recognized as a global leader and ranked 16th for the employability of its graduates, the UA is also a leader in research, bringing more than $622 million in research investment each year, and ranking 21st among all public universities. The UA is advancing the frontiers of interdisciplinary scholarship and entrepreneurial partnerships, and is a member of the Association of American Universities, the 62 leading public and private research universities. It benefits the state with an estimated economic impact of $8.3 billion annually.