Table 1.

Common gene cassette arrays in types of integrons in diverse bacterial species and their role in antimicrobial resistance

References	Antibiotics associated with gene cassettes	gene cassettes	Integrons	Bacteria
(28, 30)	Aminoglycosides, Trimethoprim, Extended Spectrum Beta-Lactamase, Erythromycin.	aadA1, aadA2, aadA5 aadB, dfrA1, dfrA5, dfrA7 dfrA12, dfr14, dfrA17, dfrB2, dfrA1-gcuC, dfrA1-aadA1, dfr17-aadA5, dfr12-gcuF-aadA2, dfrA1-sat1-aadA1, dfrA1-sat2-aadA1, estX-sat2-aadA1, blaOXA-101-aac (6')–Ib, ere2.	I, II, III	Escherichia coli
(27, 32, 33)	Extended Spectrum Beta-Lactamase, Aminoglycosides, Trimethoprim.	blaCARB-2, aadA1, aadA2, aadB, dfrA1, dfrA7, dfrA1-gcuF, dfrA1- aadA1, dfr17-aadA5, dfr12-gcuF-aadA2, sat1.	I, II	Acinetobacterbaumannii
(27, 36)	Aminoglycosides, Trimethoprim, Extended Spectrum Beta-Lactamase.	aadA, aadA1a, aadA2, aadA5, aadB, dfrA1, dfrA7, dfrA12, dfrA17, dfrA1-gcuF, dfrA1-aadA1a, dfr17-aadA5, dfr12-gcuF-aadA2, blaCARB-2.	I, II	Salmonella spp.
(4, 27)	Extended Spectrum Beta-Lactamase, Trimethoprim, Aminoglycosides,	blaCARB-2 blaGES-1, aadA, aadA1, aadB, dfrA1, dfrA7, dfrA1-gcuF, dfrA1-aadA1a, dfr17-aadA5, dfr12-gcuF-aadA2.	I, II, III	Klebsiella spp.
(16)	Aminoglycosides, Trimethoprim	aadA2, aadB, dfr17-aadA5, dfr12-gcuF-aadA2.	I	Pseudomonas aeruginosa
(46)	Aminoglycosides, Trimethoprim, Chloramphenicol	aadA1, aadA2, dfr17-aadA5, dfr12-gcuF-aadA2, aacA4-cmlA1	I	Staphylococcus aureus
(43)	Aminoglycosides, Trimethoprim	aadA1a, dfr12-gcuF-aadA2, dfrA1-sat1-aadA1.	I	Enterococcus faecalis
(44)	Aminoglycosides, Trimethoprim	aadA1a, aadA2, dfrA7, dfrA1-aadA1a, dfr17-aadA5, dfr12-gcuF-aadA	I	Enterobacter spp.