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  1. Development Resources

Cefazolin – Injection products

Exceptions to the recognized standard of CLSI M100

  Minimum Inhibitory
Concentrations
(mcg/mL)
Disk Diffusion
(zone diameter in mm)
Pathogen S I R S I R
Enterobacteriaceae ≤1 2 ≥4 - - -

S = Susceptible; I = Intermediate; R = Resistant
Interpretive criteria are based on a dose of 1 g every 8 hr.

Separate susceptibility test interpretive criteria for Enterobacteriaceae for therapy of uncomplicated urinary tract infections are not recognized at this time.