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E. coli Reference Center

The E. coli Reference Center is the largest repository for E. coli strains in America.

Due to personal leave, analysis of strains sent after July 13th may be slightly delayed.  Please contact us at for further information

The Reference Center is open and accepting cultures for testing.  Please continue to check the website before submitting cultures for upcoming announcements and updates.

About the Center

It is the largest repository for E. coli strains in America. It holds more than 70,000 strains collected over the last 50 years from animals, humans, birds and environment. Characteristics of each strain are well documented in our database and can be retrieved easily. The collection can be utilized for epidemiological studies, antimicrobial resistance over the years, relatedness between strains and for molecular tracking.