Twenty-five-year changing pattern of gonococcal antimicrobial susceptibility in Shanghai: surveillance and its impact on treatment guidelines

Table 2 Susceptibility of N. gonorrhoeae isolates to ceftriaxone in Shanghai

Year	N	Reduced*		Nonsusceptible**		MIC ₅₀	MIC ₉₀	MIC range
Year	N	n	%	n	%	(mg/L)	(mg/L)	(mg/L)
1995	117	0	0.00	0	0.00	0.008	0.015	0.008-0.03
1996	206	2	0.97	2	0.97	0.008	0.03	0.002-0.25
1997	208	7	3.37	2	0.96	0.008	0.03	0.002-0.25
1998	180	29	16.11	14	7.78	0.03	0.06	0.004-0.25
1999	208	27	12.98	12	5.77	0.015	0.06	0.002-0.25
2000	225	47	20.89	15	6.67	0.03	0.06	0.004-0.25
2001	230	39	16.96	16	6.96	0.03	0.06	0.004-0.25
2002	210	30	14.29	20	9.52	0.03	0.06	0.004-0.25
2003	302	57	18.87	34	11.26	0.03	0.125	0.004-0.25
2004	166	53	31.93	20	12.05	0.03	0.125	0.004-0.25
2005	83	26	31.33	5	6.02	0.03	0.06	0.004-0.125
2006	128	51	39.84	18	14.06	0.06	0.125	0.008-0.25
2007	200	64	32.00	10	5.00	0.03	0.06	0.004-0.25
2008	71	25	35.21	14	19.72	0.06	0.125	0.008-0.125
2009	157	36	22.93	18	11.46	0.03	0.125	0.008-0.125
2010	119	34	28.57	9	7.56	0.03	0.06	0.008-0.125
2011	135	55	40.74	14	10.37	0.06	0.125	0.008-0.125
2012	99	14	14.14	7	7.07	0.03	0.06	0.004-0.125
2013	109	43	39.45	15	13.76	0.06	0.125	0.004-0.25
Total	3153	639	20.30	245	7.80

ISSN: 1471-2334