1. Submission Criteria

Isolates that meet the criteria identified in the table below should be submitted to DSHS for further testing. 





Recommended Isolates(s)

P. aeruginosa that are resistant to at least one imipenem, meropenem, or doripenem AND Nonsusceptible (intermediate or resistant) to cefepime or ceftazidime

Escherichia coli, Klebsiella oxytoca, Klebsiella pneumoniae and Enterobacter spp. that are resistant to any imipenem, meropenem, doripenem, or ertapenem.
Providenicia, Proteus, Morganella, Citrobacter and Serratia that are resistant to any meropenem, doripenem, or ertapenem.

Acinetobacter baumanii that are resistant to imipenem, meropenem, or doripenem by standard susceptibility testing methods.

CLSI breakpoints

(Minimum Inhibitory Concentrations) 

New left Antibiotic chart green

NewAntibiotic chart middle


CRAB New Antibiotic Chart Green



Specimen type

Any non-inhibitory, non-selective agar plate or slant (e.g. Sheep Blood Agar, Tryptic Soy Agar, etc.), or broth    

Lab testing offered

MALDI-TOF mass spectrometry

Antimicrobial susceptibility testing (AST)

Modified Carbapenem Inactivation Method (mCIM) Note: For CRE and CRPA only

Real-time polymerase chain reaction (PCR) 


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