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Monthly distribution of new patients with urinary tract colonization or infection due to the three types (GEN S, GEN R, and AMG S) of E. coli with an ESBL production phenotype by unit and the long-term-care and rehabilitation subunits of the geriatric hospital over the study period (October 2001 to October 2002). Italic names indicate the rehabilitation subunits. Each symbol refers to one isolate of E. coli type GEN S (•), GEN R (▪), and AMG S (▴).
