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Test Code C Resist Stool Resistance Screen

Biohazard Infectious

Clinical System Name

Culture, Resistant Enterics Surveillance


Enteric Resistance Surveillance Screen

AmpC producer

Carbapenemase producer
Carbepenem Resistant Enterics
Extended Spectrum Beta-lactamase Producer
Metalobetalactamase Producer
Multi Drug Resistant Enterics

Vancomycin Resistant Enterococcus

Stool Culture Resistance Screen

Stool MDR Screen 


Resistant Enteric Surveillance Screen is intended as a screen for colonization of anitbiotic resistant enteric organisms (ex: VRE, ESBL, CRE, etc) which have important Infection Control implications. It is primarily used in the Hem/Onc and SCCA populations to determine if a patient is colonized with these organisms. This culture is not suitable for ruling out enteric pathogens (see Stool Culture).


Stool samples are preferred for this test, as the organisms will persist in the stool even after other sites have cleared. Specimen collection by rectal swabs, rectal e-swabs, or stool collected in diapers may significantly compromise test sensitivity. These other specimens will be accepted, but are strongly discouraged.


After a patient is determined to be colonized with a resistant organism, repeat testing will be done no more than once/month.  A patient should have 3 consecutive negative cultures (collected at least 1 week apart) to prove that they have cleared the organism.

Sample Requirements

Specimen: Stool or Lower Intestinal Tract Contents (preferred). Rectal swabs, rectal e-swabs, and samples in diapers are accepted, but are discouraged because of decreased test sensitivity.

Container: Sterile Container

Preferred Vol: 0.5 grams or mL

Minimum Vol: 0.2 grams or mL




Processing Instructions

CPA: Send sample to Microbiology for processing. If sample is shared and only one tube, syringe or other container is received, affix shared sample label and send entire sample plus requisition to Microbiology.


Off-site collection:  Off-site Children's Lab locations should send to SCH Main Campus for testing. Refrigerate sample before and during courier transport.


Other off-site locations, refrigerate sample prior to and during transport to the SCH Microbiology Laboratory. 


Temp Time
Room temp 2 hours
Refrigerated 8 hours
Frozen N



Procedure Performed Turn Around Time (TAT)
Culture 24/7 48 - 72 hour


Performing Laboratory

Seattle Children's Laboratory



Microbiology Laboratory

CPT Codes



This test is not limited to the CPT codes listed.  Others may be added as more testing is necessary and depending on the pathogens isolated (such as MIC's and ID's)

Reporting Information

Negative Final Report: 48 hours


Notifiable Result

Carbapenem-Resistant Enterobacteriaceae is considered a Notifiable Condition by Wash State law. See link below for definition and reporting information.


See Link below for Notifiable Conditions for WA state labs:


See Link below for PDF of phone numbers for Local Health jurisdictions (by County) in WA State: