Table 2. Comparison of percent of Streptococcus pneumoniae isolates nonsusceptible to third-generation cephalosporins by site: active surveillance (ABCs) versus antibiograms.

Site	Antibiogram				ABCs				Difference in % nonsusceptible (antibiograms vs. ABCs)
	No. laboratoriesa	Non-susceptible isolates	Total no. isolates tested	% non-susceptible	No. laboratories	Non-susceptible isolates	Total no. isolates tested	% non-susceptible
Tennessee	10	54	357	15.1	31	114	440	25.9	–10.8
New York	3	2	84	2.4	20	5	69	7.2	–4.8
California	4	14	412	3.4	10	15	184	8.1	–4.7
Connecticut	5	19	267	7.1	32	73	624	11.7	–4.6
Oregon	6	34	419	8.1	15	14	178	7.9	0.2
Maryland	5	53	476	11.1	27	48	557	8.6	2.5
Minnesota	7	104	543	19.2	25	60	435	13.8	5.4
Georgia	14	222	1272	17.5	39	102	850	12.0	5.5
Total	54	502	3,830	13.1	199	431	3,337	12.9	Median: –2.25

^aOnly laboratories whose antibiograms covered the calendar year in question (1997 for all sites except NY [1998]) were compared to ABCs.