Ceftazidime

Predictable Activity

Bordetella bronchoseptica
Citrobacter koseri
Comamonas spp
Escherichia coli
Haemophilus influenzae
Haemophilus parainfluenzae
Klebsiella oxytoca
Klebsiella pneumoniae
Proteus mirabilis
Pseudomonas aeruginosa
Raoultella spp

Unpredictable Activity

Acinetobacter spp
Aerobic Gram negative bacilli – nonfermenters
Alcaligenes spp
ß-haemolytic Streptococci (Group A,B,C,G)
Burkholderia spp
Leuconostoc spp
Moraxella catarrhalis
Pediococcus spp
Pseudomonas spp (other than P. aeruginosa)
Shingomonas spp
Streptococcus pneumoniae (Pen-S)

No/Insufficient Activity

Anaerobes (Gram positive and Gram negative)
Chlamydia spp
Chryseobacterium spp
Citrobacter freundii complex
Enterobacter spp
Enterobacterales with ESBL or carbapenemase
Enterococcus spp
Hafnia spp
Listeria monocytogenes
Morganella morganii
Mycoplasma spp
Ochrobactrum spp
Proteus vulgaris complex
Providencia spp
Ralstonia spp
Rickettsia spp
Salmonella spp
Serratia spp
Staphylococcus aureus (MSSA, MRSA)
Staphylococcus lugdunensis
Stenotrophomonas maltophilia
Streptococcus pneumoniae (Pen-I, Pen-R)
Viridans group Streptococci