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Frequency of ESBL producers among E. coli and K. pneumoniae isolates in the SMART and TEST antimicrobial surveillance programs.8, 27, 28, 31, 36 *United States data only. DISN, Doripenem International Surveillance Network; ESBL, extended spectrum β-lactamase; SMART, Study for Monitoring Antimicrobial Resistance Trends; TEST, Tigecycline Evaluation and Surveillance Trial.
