Abstract
A nonconjugative and nontypable plasmid of a clinical Escherichia coli isolate expressing resistance to extended-spectrum cephalosporins (ESCs) was isolated and sequenced. The plasmid pECOH89 contains a CTX-M-15 resistance cassette and comprises 111,741 bp, with strong homology to bacteriophage-like plasmids and to the Salmonella-specific bacteriophage SSU5.