Table 3.

Drug resistance of Gram-negative bacteria.

	E. coli (+)		K. pneumoniae (+)		E. coli (-)		K. pneumoniae (-)
	n	Drug resistance rate%	n	Drug resistance rate%	n	Drug resistance rate%	n	Drug resistance rate%
Ampicillin	28	80	4	50	2	22.22	1	20
Ampicillin-sulbactam	25	71.43	2	25	8	88.89	1	20
Aztreonam	23	65.71	1	12.5	5	55.56	0	0
Cefazolin	32	91.43	1	12.5	9	100	0	0
Ceftriaxone	32	91.43	1	12.5	9	100	0	0
Ceftazidime	14	40	1	12.5	2	22.22	0	0
Cefotetan	0	0	0	0	1	11.11	0	0
Cefepime	18	51.43	0	0	1	11.11	0	0
Piperacillin/tazobactam sodium	2	5.71	0	0	1	11.11	0	0
Imipenem	0	0	0	0	0	0	0	0
Ertapenem	0	0	0	0	0	0	0	0
Ciprofloxacin	33	94.29	4	50	5	55.56	3	60
Levofloxacin	32	91.43	4	50	3	33.33	1	20
Amikacin	6	17.14	0	0	1	11.11	0	0
Gentamicin	19	54.29	3	37.5	9	100	3	60
Tobramycin	14	40	2	25	5	55.56	1	20
Trimethoprim/sulfamethoxazole	21	60	5	62.5	9	100	3	60