TABLE 1.

Integron gene composition related to the phenotype of resistance found in A. baumannii clinical isolates

No. of isolates (n = 19)	Amplicon size (bp)	Resistance gene(s)	Resistance phenotypea
15	700	aadB	GEN, TOB
1	2,400b	aacA4, ORF O, blaOXA-20	AMK, TOB,
			β-Lactams
2	800b	aacA4	TOB
1	2,800b	aacC1, ORF X, ORF X′, aadA1a	GEN

^aAbbreviations: GEN, gentamicin; TOB, tobramycin; AMK, amikacin.

^bGene cassettes found in Italian isolates.