Table 2: Antibiotic resistance rates of β-lactamase-positive and β-lactamase-negative isolates of Haemophilus influenzae.

Antibioticβ-Lactamase (+)β-Lactamase (−)
nR (%)I (%)S (%)nR (%)I (%)S (%)

Ampicillin104297.03.00.0103118.76.375.0
Ampicillin-sulbactam104215.40.084.6103119.90.080.1
Cefuroxime104241.60.051.4103120.83.375.9
Cefotaxime10396.40.093.610305.50.094.5
Meropenem10420.20.099.810310.00.0100
Chloramphenicol10196.32.691.29902.63.793.7
SXT104279.81.218.9103162.22.035.8
Levofloxacin10420.90.099.110310.90.099.1
Azithromycin81555.20.044.88028.50.091.5

Note. SXT, sulfamethoxazole-trimethoprim. . S, susceptible; I, intermediate; R, resistant.