Table 1

Antibiotic susceptibility of 31 Neisseria gonorrhoeae isolates from Bissau, Guinea-Bissau

Antibiotic (breakpoints)Susceptible (%)Intermediate (%)Resistant (%)
Penicillin G (S≤0.064/R>1.0)*5 (16)5 (16)21 (68)
Ampicillin (S≤0.125/R>3.0)10 (32)021 (68)
Cefixime (S≤0.125/R>0.125)*31 (100)00
Ceftriaxone (S≤0.125/R>0.125)*31 (100)00
Cefuroxime (S≤0.064/R>1.0)5 (16)26 (84)0
Azithromycin (S≤0.25/R>0.5)*31 (100)00
Erythromycin (S≤0.25/R>0.5)26 (84)3 (10)2 (6)
Ciprofloxacin (S≤0.032/R>0.064)*28 (90)03 (10)
Spectinomycin (S≤64/R>64)*31 (100)00
Tetracycline (S≤0.5/R>1.0)*8 (26)023 (74)
Rifampicin (S≤0.125/R>32)24 (77)3 (10)4 (13)
GentamicinMIC range: 0.75–6 mg/l
KanamycinMIC range: 8–32 mg/l
  • * Breakpoints (for susceptible (S≤x mg/l) and resistant (R>y mg/l)) according to the European Committee on Antimicrobial Susceptibility Testing (EUCAST; http://www.eucast.org) were used, when available.

  • All were β-lactamase producing.

  • MIC, minimum inhibitory concentration.