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Table 3 Susceptibilities of N. gonorrhoeae to Penicillin G and Tetracycline 2002–2012 (mg/L)

From: The prevalence and epidemiology of plasmid-mediated penicillin and tetracycline resistance among Neisseria gonorrhoeae isolates in Guangzhou, China, 2002–2012

Year No.of isolates Penicillin Ga Tetracycline
MIC50 MIC90 MIC range S (%) I (%) R (%) MIC50 MIC90 MIC range S (%) R (%)
2002 180 4 >32 0.03– >32 1 (0.6) 15 (8.3) 164 (91.1) 2 >16 0.125– >16 21 (11.7) 159 (88.3)
2003 115 16 >32 0.06– >32 0 (0.0) 3 (2.6) 112 (97.4) 2 >16 0.5– >16 23 (20.0) 92 (80.0)
2004 90 4 >32 0.125– >32 0 (0.0) 8 (8.9) 82 (91.1) 4 >16 0.5– >16 12 (13.3) 78 (86.7)
2005 76 16 >32 0.25– >32 0 (0.0) 5 (6.6) 71 (93.4) 4 64 <0.5– >64 15 (19.7) 64 (84.3)
2006 104 8 >32 >32–0.125 0 (0.0) 5 (4.8) 99 (95.2) 8 16 0.5– >64 20 (19.2) 84 (80.8)
2007 95 8 >32 0.06– >32 4 (4.2) 9 (9.5) 82 (86.3) 32 >32 <0.5– >32 17 (17.9) 78 (82.1)
2008 183 8 >32 <0.06– >32 2 (1.1) 16 (8.7) 165 (90.2) 16 >32 <0.25– >32 12 (6.6) 171 (93.4)
2009 151 1 >32 0.125– >32 1 (0.7) 44 (29.1) 106 (70.1) 32 >32 0.25– >32 13 (8.7) 138 (91.4)
2010 136 2 >32 0.125– >32 1 (0.7) 55 (40.4) 80 (58.9) 8 >32 <0.25– >32 17 (12.5) 119 (87.5)
2011 127 2 >32 <0.03– >32 1 (0.8) 22 (17.3) 104 (81.9) 4 >32 <0.125– >32 0 (0.0) 127 (100)
2012 121 4 >32 0.25– >32 0 11 (9.1) 110 (90.9) 4 >32 0.125– >32 13 (10.7) 108 (89.3)
  1. aMIC mg/L, S sensitivity, I intermediate sensitivity, R resistance