Integrons and Gene Cassettes in theEnterobacteriaceae

ABSTRACT Integrons were detected in 59 of 120 (49%) urinary isolates ofEnterobacteriaceae by PCR using degenerate primers targeted to conserved regions of class 1, 2, and 3 integrase genes. PCR sequencing analysis of the cassette arrays revealed a predominance of cassettes that confer resistance to the aminoglycosides and trimethoprim.

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