Table 6.

Gene cassette arrays in class 1 integrons from Shigella sonnei, 2002–2011.

Approximate length (kb)	No. of isolates	Gene cassette array
0.15	22	5′CS and 3′CS
1.5	5	dfrA1–aadA1
1.6	4	dfrA17–aadA5
2.2	42	aacA4–cmlA1
0.15 + 1.5	1	5′CS and 3′CS, dfrA1–aadA1
0.15 + 2.2	52	5′CS and 3′CS, aacA4–cmlA1
0.75 + 2.2	1	dfrA5, aacA4–cmlA1
1.5 + 2.2	13	dfrA1–aadA1, aacA4–cmlA1
1.6 + 2.2	1	dfrA17–aadA5, aacA4–cmlA1
0.15 + 0.75 + 2.2	1	5′CS and 3′CS, dfrA5, aacA4–cmlA1
0.15 + 1.5 + 2.2	4	5′CS and 3′CS, dfrA1–aadA1, aacA4–cmlA1