TABLE 4.

Antimicrobial resistance of Shigella strains harboring an integron^a

Species (no. of strains)	Integrase 1 gene		Integrase 2 gene		Integrase 1 + 2 genes		Total no. of resistant strains
	No. of strains	Resistance phenotype (no. of isolates)	No. of strains	Resistance phenotype (no. of isolates)	No. of strains	Resistance phenotype (no. of isolates)
S. sonnei (31)	0		31	STR-SPT TMP (8)	0		31
				STR TET SUL TMP (1)
				STR TET SUL TMP NAL (2)
				STR-SPT TET SUL TMP (18)
				AMP STR-SPT TET SUL TMP (2)
S. flexneri (30)	12	AMP STR-SPT TET CHL (3)	0		7	AMP STR-SPT TET CHL SUL TMP (7)	19
		AMP STR-SPT TET CHL SUL TMP (9)
S. dysenteriae (4)	2	AMP STR-SPT TET	0		2	AMP TET CHL TMP (1)	4
		CHL (2)				AMP STR-SPT TET CHL SUL TMP (1)
S. boydii (3)	0		1	STR-SPT TET SUL TMP (1)	0		1
Total (68)	14		32		9		55

^aNAL, nalidixic acid.