A novel gene, aac(3)-Ic, encoding an AAC(3)-I aminoglycoside 3-N-acetyltransferase, was identified on a gene cassette inserted into a Pseudomonas aeruginosa integron that also carries a bla(VIM-2) and a cmlA7 gene cassette. The aac(3)-Ic gene product is 59 and 57% identical to AAC(3)-Ia and AAC(3)-Ib, respectively, and confers resistance to gentamicin and sisomicin.

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BACKGROUND AND OBJECTIVES Cystic fibrosis (CF) is an autosomal recessive genetic disease. Infections in these patients are mostly caused by three bacteria: Staphylococcus aureus, Haemophilus influenza and particularly Pseudomonas aeruginosa. Carbapenems including antibiotics are used to combat infections with Pseudomonas aeruginosa. In recent years, carbapenems resistant strains of P. aeruginos...