. 1998 Jul;42(7):1671–1676. doi: 10.1128/aac.42.7.1671

TABLE 1.

Profiles of St. Louis isolates

Strain	Organism	Kirby-Bauer susceptibility zone diameters (mm)^a										Presence of β-lactamases with the following pIs:						Possible identity of β-lactamase(s)
Strain	Organism	AMP	AMC	SAM	PIP	PTZ	CAZ	CTX	ATM	FOX	IPM	5.4	5.6	6.1	7.6	8.7	9.0	Possible identity of β-lactamase(s)
114	K. pneumoniae	6	18	14	6	22	8	17	6	23	27	X			X		X	TEM-1 or TEM-7; SHV-1, SHV-2, SHV-4, or SHV-7; chromosomal
117	K. pneumoniae	6	14	8	6	18	6	22	6	14	26	X	X		X	X		TEM-1 or TEM-7; TEM-2, TEM-10, or TEM-26; SHV-1, SHV-2, SHV-4, SHV-6, or SHV-7; AmpC type
119	K. pneumoniae	6	18	10	6	23	8	28	13	23	30	X						TEM-7 (?)
122	K. pneumoniae	6	16	17	6	25	10	23	13	13	26		X		X	X		TEM-2, TEM-10, or TEM-26; SHV-1, SHV-2, SHV-4, SHV-6, or SHV-7; chromosomal
123	K. pneumoniae	6	15	6	6	18	6	23	10	13	28	X	X		X	X		TEM-1 or TEM-7; TEM-2, TEM-10, or TEM-26; SHV-1; AmpC type
125	K. pneumoniae	6	16	13	6	18	6	23	9	17	27		X					TEM-10 or TEM-26
149	E. coli	6	14	19	6	25	8	23	14	24	21			X				TEM-6, TEM-28, or TEM-43
154	E. coli	14	20	19	15	25	26	29	32	12	32						X	AmpC type
156	E. coli	6	15	15	6	25	6	14	6	17	30			X				TEM-43
162	Klebsiella oxytoca	6	16	14	6	22	6	23	10	23	27			X		X		TEM-6, TEM-28, or TEM-43; chromosomal
164	K. pneumoniae	6	17	10	6	19	8	16	7	15	27	X						TEM-7 (?)
166	E. coli	6	17	18	6	25	13	28	20	21	25		X					TEM-10
171	K. pneumoniae	6	16	17	6	23	9	23	16	23	24			X		X		TEM-6, TEM-28, or TEM-43; chromosomal
179	K. pneumoniae	6	15	16	6	22	6	24	11	22	26			X				TEM-6, TEM-28, or TEM-43
181	K. pneumoniae	6	17	13	6	21	10	6	14	18	26	X			X	X		TEM-1 or TEM-7; SHV-1, SHV-2, SHV-4, or SHV-6; chromosomal
185	K. pneumoniae	6	16	9	6	18	11	14	11	24	26	X			X	X		TEM-1 or TEM-7; SHV-1, SHV-2, SHV-4, SHV-6, or SHV-7; chromosomal
193	K. pneumoniae	6	20	18	6	24	10	25	17	25	25			X	X			TEM-6, TEM-28, or TEM-43; SHV-1
196	K. pneumoniae	6	15	17	6	22	6	23	13	24	27			X	X			TEM-6, TEM-28, or TEM-43; SHV-1
201	K. pneumoniae	6	16	15	6	22	6	21	15	19	28			X	X			TEM-6, TEM-28, or TEM-43; SHV-1, SHV-2, SHV-4, SHV-6, or SHV-7

Disk diffusion tests were performed by a standard method, and the results were interpreted according to the guidelines of the National Committee for Clinical Laboratory Standards (17, 18). Abbreviations: AMP, ampicillin, AMC, amoxicillin clavulanic acid; SAM, ampicillin plus sulbactam; TIC, ticarcillin, TIM, ticarcillin plus clavulanic acid; PIP, piperacillin, PTZ, piperacillin plus tazobactam; CAZ, ceftazidime; CTX, cefotaxime; ATM, aztreonam, IMP, imipenem; FOX, cefoxitin.