Enterobacteriaceae: ≤ 4 µg/ ml susceptible, ≥ 32 µg/ ml resistant Staphylococcus spp.: ≤ 4 µg/ ml susceptible, ≥ 32 µg/ ml resistant Haemophilus spp.: ≤ 4 µg/ ml susceptible; ≥ 16 µg/ ml resistant Streptococcus pneumoniae: ≤ 1 µg/ ml susceptible, ≥ 4 µg/ ml resistant Streptococcus spp. other than S. pneumoniae: