[Correlations of integrons and resistance gene cassettes in Gram-negative bacteria with multi-drug resistance].

Objective: To explore the correlations of integrons, gene cassettes and drug resistance phenotypes in 90 multi-drug resistant Gram-negative bacteria.

Methods: Class I/II/III integron and variable region of positive strains of 90 Gram-negative bacteria were amplified by PCR and types of integron variable region gene cassettes analyzed by DNA sequence. And the resistant rates of integron positive and negative strains were tested by drug susceptibility.