Table 2. The percentages of resistance among different Shigella serotypes to various antimicrobial agents.

	Number resistant to antimicrobials (%)
Antimicrobial agents	Total (n = 535)	S. dysenteriae (n = 10)	S. flexneri (n = 407)	S. boydii (n = 17)	S. sonnei (n = 100)
Nalidixic Acid	491(91.77)	8(80)	373(91.64)	11(64.70)	99(99)
Ciprofloxacin	446(83.36)	2(20)	342(84.02)	3(17.65)	99(99)
Norfloxacin	427(79.81)	1(10)	331(81.33)	3(17.65)	92(92)
Ofloxacin	438(81.87)	1(10)	340(83.54)	2(11.76)	95(95)
Tetracycline	404(75.51)	5(50)	329(80.84)	3(17.65)	67(67)
Ampicillin	291(54.39)	5(50)	262(64.37)	11(64.70)	13(13)
Ceftriaxone	32(5.98)	0(0)	25(6.14)	1(5.88)	6(6)
Co-trimoxazole	351(65.60)	5(50)	259(63.63)	10(58.82)	77(77)
Streptomycin	374(69.90)	7(70)	271(66.58)	16(94.12)	80(80)
Chloramphenicol	248(46.35)	3(30)	240(58.97)	1(5.88)	4(4)