TABLE 1

Antimicrobial and susceptibility categories identified in 866 Neisseria meningitidis strains by year, 2006 to 2016

Susceptibility category (MIC) by antimicrobial (μg/ml)aNo. of strains by yr (n)
2006 (88)2007 (80)2008 (101)2009 (104)2010 (69)2011 (66)2012 (62)2013 (69)2014 (60)2015 (72)2016 (95)Total (866)
Ceftriaxone
    S ≤ 0.125888010110469666269607295866
Cefotaxime
    S ≤ 0.125NAbNANANANANANANA607295227
Ciprofloxacin
    S ≤ 0.03888010110368666269607295864
    R > 0.03000110000002
Rifampin
    S ≤ 0.25887910110169666069607295860
    R > 0.25010300200006
Penicillin G
    S ≤ 0.064954696938392534223241472
    0.094 < I < 0.253426323431273735384054388
    R > 0.25500100000006
  • a S, susceptible; R, resistant; I, intermediate.

  • b NA, not applicable; antimicrobial susceptibility testing for cefotaxime was evaluated starting from 2014.